Cisco IOS IP Addressing Services Command Reference
show ip masks through vrf DHCP pool
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show ip masks through vrf DHCP pool

Contents

show ip masks through vrf DHCP pool

show ip masks

To display the masks used for network addresses and the number of subnets using each mask, use the show ip masks command in EXEC mode.

show ip masks address

Syntax Description

address

Network address for which a mask is required.

Command Modes

EXEC

Command History

Release

Modification

10.0

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

The show ip masks command is useful for debugging when a variable-length subnet mask (VLSM) is used. It shows the number of masks associated with the network and the number of routes for each mask.

Examples

The following is sample output from the show ip masks command:

Router# show ip masks 172.16.0.0
Mask            Reference count
255.255.255.255 2
255.255.255.0   3
255.255.0.0     1

show ip nat limits all-host

To display the current Network Address Translation (NAT) limit entries of all configured hosts, use the show ip nat limits all-host command in user EXEC or privileged EXEC mode.

show ip nat limits all-host [ host-address host-address [ end-host-address ] | number-of-sessions { greater-than | less-than } number ] [ total ]

Syntax Description

host-address

(Optional) Displays statistics for a given address or range of addresses.

host-address

Address of the host or the starting address in a range.

end-host-address

(Optional) Ending address in a range.

number-of-sessions

(Optional) Displays statistics for limit entries with the given number of sessions.

greater-than

(Optional) Displays statistics for limit entries with more than the given number of sessions.

less-than

(Optional) Displays statistics for limit entries with less than the given number of sessions.

number

(Optional) Number of sessions for comparison. The range is from 0 to 2147483647.

total

(Optional) Displays only the total number of entries for a given query.

Command Modes

User EXEC (>)      

Privileged EXEC (#)      

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Usage Guidelines

You can use the ip nat translation max-entries all-host command to limit the all-host NAT entries.

When you specify the total keyword with the show ip nat limits all-host command, the output displays only the total entries for a given query.

Examples

The following is sample output from the show ip nat limits all-host command:

Router# show ip nat limits all-host

Host            Max Entries  Use Count   Miss Count
-------------------------------------------------

10.1.1.2         100000       1           0

Total number of limit entries: 1

The table below describes the significant fields shown in the display.

Table 1 show ip nat limits all-host Field Descriptions

Field

Description

Host

The inside local or the outside global IP address of the host. The host is the inside local IP address for inside source translations and the outside global IP address for outside source translations.

Max Entries

The configured maximum number of limit entries.

Use Count

The current number of translations for the limit entry.

Miss Count

Number of times a translation entry was not created because of the use count exceeding the configured maximum for the limit entry.

Related Commands

Command

Description

ip nat translation max-entries

Limits the number of NAT translations to a specified maximum.

show ip nat statistics

Displays NAT statistics

show ip nat limits all-vrf

To display the current Network Address Translation (NAT) limit entries for all configured VPN routing and forwarding (VRF) instances, use the show ip nat limits all-vrf command in user EXEC or privileged EXEC mode.

show ip nat limits all-vrf [ vrf-name name | number-of-sessions { greater-than | less-than } number ] [ total ]

Syntax Description

vrf-name

(Optional) Displays statistics for a specified VRF.

name

VRF name.

number-of-sessions

(Optional) Displays statistics for limit entries with the given number of sessions.

greater-than

(Optional) Displays statistics for limit entries with more than the given number of sessions.

less-than

(Optional) Displays statistics for limit entries with less than the given number of sessions.

number

(Optional) Number of sessions for comparison. The range is from 0 to 2147483647.

total

(Optional) Displays only the total number of entries for a given query.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Usage Guidelines

You can use the ip nat translation all-vrf command to limit the all-VRF NAT entries.

When you specify the total keyword with the show ip nat limits all-vrf command, the output displays only the total entries for a given query.

Examples

The following is sample output from the show ip nat limits all-vrf command:

Router# show ip nat limits all-vrf

VRF Name        Max Entries  Use Count   Miss Count
-------------------------------------------------

VRF1             100000       1           0

Total number of limit entries: 1

The table below describes the significant fields shown in the display.

Table 2 show ip nat limits all-vrf Field Descriptions

Field

Description

VRF Name

Name of the VRF instance.

Max Entries

The configured maximum number of limit entries.

Use Count

The current number of translations for the limit entry.

Miss Count

Number of times a translation entry was not created because of the use count exceeding the configured maximum for the limit entry.

Related Commands

Command

Description

ip nat translation max-entries

Limits the number of NAT translations to a specified maximum.

show ip nat statistics

Displays NAT statistics

show ip nat nvi statistics

To display NAT virtual interface (NVI) statistics, use the show ip nat nvi statisticscommand in user EXEC or privileged EXEC mode.

show ip nat nvi statistics

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>) Privileged EXEC (#)

Command History

Release

Modification

12.3(14)T

This command was introduced.

Examples

The following is sample output from the show ip nat nvi statistics command:

Router# show ip nat nvi statistics
Total active translations: 0 (0 static, 0 dynamic; 0 extended) NAT Enabled interfaces:
Hits: 0  Misses: 0
CEF Translated packets: 0, CEF Punted packets: 0 Expired translations: 0 Dynamic mappings:
-- Inside Source
[Id: 1] access-list 1 pool pool1 refcount 1213 pool pool1: netmask 255.255.255.0
         start 192.168.1.10 end 192.168.1.253
         start 192.168.2.10 end 192.168.2.253
         start 192.168.3.10 end 192.168.3.253
         start 192.168.4.10 end 192.168.4.253
         type generic, total addresses 976, allocated 222 (22%), misses 0
[Id: 2] access-list 5 pool pool2 refcount 0 pool pool2: netmask 255.255.255.0
         start 192.168.5.2 end 192.168.5.254
         type generic, total addresses 253, allocated 0 (0%), misses 0
[Id: 3] access-list 6 pool pool3 refcount 3 pool pool3: netmask 255.255.255.0
         start 192.168.6.2 end 192.168.6.254
         type generic, total addresses 253, allocated 2 (0%), misses 0
[Id: 4] access-list 7 pool pool4 refcount 0 pool pool4 netmask 255.255.255.0
         start 192.168.7.30 end 192.168.7.200
         type generic, total addresses 171, allocated 0 (0%), misses 0
[Id: 5] access-list 8 pool pool5 refcount 109195 pool pool5: netmask 255.255.255.0
         start 192.168.10.1 end 192.168.10.253
         start 192.168.11.1 end 192.168.11.253
         start 192.168.12.1 end 192.168.12.253
         start 192.168.13.1 end 192.168.13.253
         start 192.168.14.1 end 192.168.14.253
         start 192.168.15.1 end 192.168.15.253
         start 192.168.16.1 end 192.168.16.253
         start 192.168.17.1 end 192.168.17.253
         start 192.168.18.1 end 192.168.18.253
         start 192.168.19.1 end 192.168.19.253
         start 192.168.20.1 end 192.168.20.253
         start 192.168.21.1 end 192.168.21.253
         start 192.168.22.1 end 192.168.22.253
         start 192.168.23.1 end 192.168.23.253
         start 192.168.24.1 end 192.168.24.253
         start 192.168.25.1 end 192.168.25.253
         start 192.168.26.1 end 192.168.26.253
         type generic, total addresses 4301, allocated 3707 (86%),misses 0 Queued Packets:0

The table below describes the fields shown in the display.

Table 3 show ip nat nvi statistics Field Descriptions

Field

Description

Total active translations

Number of translations active in the system. This number is incremented each time a translation is created and is decremented each time a translation is cleared or timed out.

NAT enabled interfaces

List of interfaces marked as NAT enabled with the ip nat enable command.

Hits

Number of times the software does a translations table lookup and finds an entry.

Misses

Number of times the software does a translations table lookup, fails to find an entry, and must try to create one.

CEF Translated packets

Number of packets switched via Cisco Express Forwarding (CEF).

CEF Punted packets

Number of packets punted to the process switched level.

Expired translations

Cumulative count of translations that have expired since the router was booted.

Dynamic mappings

Indicates that the information that follows is about dynamic mappings.

Inside Source

The information that follows is about an inside source translation.

access-list

Access list number being used for the translation.

pool

Name of the pool.

refcount

Number of translations using this pool.

netmask

IP network mask being used in the pool.

start

Starting IP address in the pool range.

end

Ending IP address in the pool range.

type

Type of pool. Possible types are generic or rotary.

total addresses

Number of addresses in the pool available for translation.

allocated

Number of addresses being used.

misses

Number of failed allocations from the pool.

Queued Packets

Number of packets in the queue.

Related Commands

Command

Description

show ip nat nvi translations

Displays active NAT virtual interface translations.

show ip nat nvi translations

To display active NAT virtual interface (NVI) translations, use the show ip nat nvi translations command in user EXEC or privileged EXEC mode.

show ip nat nvi translations [ protocol [ global | vrf vrf-name ] | vrf vrf-name | global ] [verbose]

Syntax Description

protocol

(Optional) Displays protocol entries. The protocol argument must be replaced with one of the following keywords:

  • esp --Encapsulating Security Payload (ESP) protocol entries.

  • icmp --Internet Control Message Protocol (ICMP) entries.

  • pptp --Point-to-Point Tunneling Protocol (PPTP) entries.

  • tcp --TCP protocol entries.

  • udp --User Datagram Protocol (UDP) entries.

global

(Optional) Displays entries in the global destination table.

vrf vrf-name

(Optional) Displays VPN routing and forwarding (VRF) traffic-related information.

verbose

(Optional) Displays additional information for each translation table entry, including how long ago the entry was created and used.

Command Modes

User EXEC (>) Privileged EXEC (#)

Command History

Release

Modification

12.3(14)T

This command was introduced.

Examples

The following is sample output from the show ip nat nvi translations command:

Router# show ip nat nvi translations
Pro    Source global        Source local        Destin  local      Destin  global
icmp   172.20.0.254:25    172.20.0.130:25      172.20.1.1:25      10.199.199.100:25
icmp   172.20.0.254:26    172.20.0.130:26      172.20.1.1:26      10.199.199.100:26
icmp   172.20.0.254:27    172.20.0.130:27      172.20.1.1:27      10.199.199.100:27
icmp   172.20.0.254:28    172.20.0.130:28      172.20.1.1:28      10.199.199.100:28

The table below describes the fields shown in the display.

Table 4 show ip nat nvi translations Field Descriptions

Field

Description

Pro

Protocol of the port identifying the address.

Source global

Source global address.

Source local

Source local address.

Destin local

Destination local address.

Destin global

Destination global address.

Related Commands

Command

Description

show ip nat nvi statistics

Displays NAT virtual interface statistics.

show ip nat redundancy

To display the Network Address Translation (NAT) high-availability information, use the show ip nat redundancy command in privileged EXEC mode.

show ip nat redundancy rg-id

Syntax Description

rg-id

Redundancy group (rg) ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release Modification
15.3(2)T

This command was introduced.

Usage Guidelines

Use the show ip nat redundancy command to display information about the NAT high-availability Finite State Machine (FSM) and RG statistics.

Examples

The following is sample output from the show ip nat redundancy command. The output fields are self-explanatory.

Device1# show ip nat redundancy 1

        RG ID: 1        RG Name: RG1
        Current State: IPNAT_HA_RG_ST_ACT_BULK_DONE
        Previous State: IPNAT_HA_RG_ST_ACTIVE
        Recent Events: Curr: IPNAT_HA_RG_EVT_RF_ACT_STBY_HOT
                        Prev: IPNAT_HA_RG_EVT_RF_ACT_STBY_BULK_START

        Statistics :
                Static Mappings: 1,     Dynamic Mappings: 0
                Sync-ed Entries :
                        NAT Entries: 0, Door Entries: 0
                Mapping ID Mismatches: 0
                Forwarded Packets: 0,   Dropped Packets : 0
                Redirected Packets: 0


Device2# show ip nat redundancy 1

        RG ID: 1        RG Name: RG1
        Current State: IPNAT_HA_RG_ST_STBY_HOT
        Previous State: IPNAT_HA_RG_ST_STBY_COLD
        Recent Events: Curr: IPNAT_HA_RG_EVT_RF_STBY_COLD
                        Prev: IPNAT_HA_RG_EVT_NAT_CFG_REF

        Statistics :
                Static Mappings: 1,     Dynamic Mappings: 0
                Sync-ed Entries :
                        NAT Entries: 0, Door Entries: 0
                Mapping ID Mismatches: 0
                Forwarded Packets: 0,   Dropped Packets : 0
                Redirected Packets: 0

Related Commands

Command

Description

show ip nat translations redundancy

Displays active NAT translations.

show ip nat statistics

To display Network Address Translation (NAT) statistics, use the show ip nat statistics command in user EXEC or privileged EXEC mode.

show ip nat statistics

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

11.2

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

Cisco IOS XE Release 3.4S

This command was modified. The NAT limit statistics for all hosts and for all VPN routing and forwarding (VRF) instances were removed from the output of this command.

Examples

The following is sample output from the show ip nat statistics command:

Router# show ip nat statistics

Total translations: 2 (0 static, 2 dynamic; 0 extended)
Outside interfaces: Serial0
Inside interfaces: Ethernet1
Hits: 135  Misses: 5
Expired translations: 2
Dynamic mappings:
-- Inside Source
access-list 1 pool net-208 refcount 2
 pool net-208: netmask 255.255.255.240
        start 172.16.233.208 end 172.16.233.221
        type generic, total addresses 14, allocated 2 (14%), misses 0

The table below describes the significant fields shown in the display.

Table 5 show ip nat statistics Field Descriptions

Field

Description

Total translations

Number of translations active in the system. This number is incremented each time a translation is created and is decremented each time a translation is cleared or times out.

Outside interfaces

List of interfaces marked as outside with the ip nat outside command.

Inside interfaces

List of interfaces marked as inside with the ip nat inside command.

Hits

Number of times the software does a translations table lookup and finds an entry.

Misses

Number of times the software does a translations table lookup, fails to find an entry, and must try to create one.

Expired translations

Cumulative count of translations that have expired since the router was booted.

Dynamic mappings

Indicates that the information that follows is about dynamic mappings.

Inside Source

Indicates that the information that follows is about an inside source translation.

access-list

Access list number being used for the translation.

pool

Name of the pool (in this case, net-208).

refcount

Number of translations using this pool.

netmask

IP network mask being used in the pool.

start

Starting IP address in the pool range.

end

Ending IP address in the pool range.

type

Type of pool. Possible types are generic or rotary.

total addresses

Number of addresses in the pool available for translation.

allocated

Number of addresses being used.

misses

Number of failed allocations from the pool.

Related Commands

Command

Description

clear ip nat translation

Clears dynamic NAT translations from the translation table.

ip nat

Designates that traffic originating from or destined for the interface is subject to NAT.

ip nat inside destination

Enables NAT of the inside destination address.

ip nat inside source

Enables NAT of the inside source address.

ip nat outside source

Enables NAT of the outside source address.

ip nat pool

Defines a pool of IP addresses for NAT.

ip nat service

Changes the amount of time after which NAT translations time out.

show ip nat translations

Displays active NAT translations.

show ip nat translations

To display active Network Address Translation ( NAT) translations, use the show ip nat translationscommand inEXEC mode.

show ip nat translations [ inside global-ip ] [ outside local-ip ] [esp] [icmp] [pptp] [tcp] [udp] [verbose] [ vrf vrf-name ]

Syntax Description

esp

(Optional) Displays Encapsulating Security Payload (ESP) entries.

icmp

(Optional) Displays Internet Control Message Protocol (ICMP) entries.

inside global-ip

(Optional) Displays entries for only a specific inside global IP address.

outside local-ip

(Optional) Displays entries for only a specific outside local IP address.

pptp

(Optional) Displays Point-to-Point Tunneling Protocol (PPTP) entries.

tcp

(Optional) Displays TCP protocol entries.

udp

(Optional) Displays User Datagram Protocol (UDP) entries.

verbose

(Optional) Displays additional information for each translation table entry, including how long ago the entry was created and used.

vrf vrf-name

(Optional) Displays VPN routing and forwarding (VRF) traffic-related information.

Command Modes

EXEC

Command History

Release

Modification

11.2

This command was introduced.

12.2(13)T

The vrf vrf-namekeyword and argument combination was added.

12.2(15)T

The esp keyword was added.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

XE 2.4.2

The insideand outsidekeywords were added.

15.4(2)S

This command was implemented on the Cisco ASR 901 Series Aggregation Services Router.

Examples

The following is sample output from the show ip nat translations command. Without overloading, two inside hosts are exchanging packets with some number of outside hosts.

Router# show ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
--- 10.69.233.209     192.168.1.95       ---                ---
--- 10.69.233.210     192.168.1.89       ---                --

With overloading, a translation for a Domain Name Server (DNS) transaction is still active, and translations for two Telnet sessions (from two different hosts) are also active. Note that two different inside hosts appear on the outside with a single IP address.

Router# show ip nat translations
Pro Inside global        Inside local       Outside local      Outside global
udp 10.69.233.209:1220  192.168.1.95:1220  172.16.2.132:53    172.16.2.132:53
tcp 10.69.233.209:11012 192.168.1.89:11012 172.16.1.220:23    172.16.1.220:23
tcp 10.69.233.209:1067  192.168.1.95:1067  172.16.1.161:23    172.16.1.161:23

The following is sample output that includes the verbose keyword:

Router# show ip nat translations verbose
Pro Inside global        Inside local       Outside local      Outside global
udp 172.16.233.209:1220  192.168.1.95:1220  172.16.2.132:53    172.16.2.132:53
        create 00:00:02, use 00:00:00, flags: extended
tcp 172.16.233.209:11012 192.168.1.89:11012 172.16.1.220:23    172.16.1.220:23
        create 00:01:13, use 00:00:50, flags: extended
tcp 172.16.233.209:1067  192.168.1.95:1067  172.16.1.161:23    172.16.1.161:23
        create 00:00:02, use 00:00:00, flags: extended

The following is sample output that includes the vrf keyword:

Router# show ip nat translations vrf 
abc
Pro Inside global      Inside local       Outside local      Outside global
--- 10.2.2.1            192.168.121.113    ---                ---
--- 10.2.2.2            192.168.122.49     ---                ---
--- 10.2.2.11           192.168.11.1       ---                ---
--- 10.2.2.12           192.168.11.3       ---                ---
--- 10.2.2.13           172.16.5.20        ---                ---
Pro Inside global      Inside local       Outside local      Outside global
--- 10.2.2.3            192.168.121.113    ---                ---
--- 10.2.2.4            192.168.22.49      ---                ---

The following is sample output that includes the esp keyword:

Router# show ip nat translations esp
 
Pro Inside global         Inside local          Outside local         Outside global 
esp 192.168.22.40:0       192.168.122.20:0      192.168.22.20:0       192.168.22.20:28726CD9 
esp 192.168.22.40:0       192.168.122.20:2E59EEF5 192.168.22.20:0     192.168.22.20:0 

The following is sample output that includes the esp and verbose keywords:

Router# show ip nat translation esp verbose
 
Pro Inside global         Inside local          Outside local         Outside global 
esp 192.168.22.40:0       192.168.122.20:0      192.168.22.20:0       192.168.22.20:28726CD9 
    create 00:00:00, use 00:00:00, 
    flags:
extended, 0x100000, use_count:1, entry-id:192, lc_entries:0 
esp 192.168.22.40:0       192.168.122.20:2E59EEF5 192.168.22.20:0     192.168.22.20:0 
    create 00:00:00, use 00:00:00, left 00:04:59, Map-Id(In):20, 
    flags:
extended, use_count:0, entry-id:191, lc_entries:0 

The following is sample output that includes the insidekeyword:

Router# show ip nat translations inside 10.69.233.209
Pro Inside global        Inside local       Outside local      Outside global
udp 10.69.233.209:1220  192.168.1.95:1220  172.16.2.132:53    172.16.2.132:53

The table below describes the significant fields shown in the display.

Table 6 show ip nat translations Field Descriptions

Field

Description

Pro

Protocol of the port identifying the address.

Inside global

The legitimate IP address that represents one or more inside local IP addresses to the outside world.

Inside local

The IP address assigned to a host on the inside network; probably not a legitimate address assigned by the Network Interface Card (NIC) or service provider.

Outside local

IP address of an outside host as it appears to the inside network; probably not a legitimate address assigned by the NIC or service provider.

Outside global

The IP address assigned to a host on the outside network by its owner.

create

How long ago the entry was created (in hours:minutes:seconds).

use

How long ago the entry was last used (in hours:minutes:seconds).

flags

Indication of the type of translation. Possible flags are:

  • extended--Extended translation

  • static--Static translation

  • destination--Rotary translation

  • outside--Outside translation

  • timing out--Translation will no longer be used, due to a TCP finish (FIN) or reset (RST) flag.

Related Commands

Command

Description

clear ip nat translation

Clears dynamic NAT translations from the translation table.

ip nat

Designates that traffic originating from or destined for the interface is subject to NAT.

ip nat inside destination

Enables NAT of the inside destination address.

ip nat inside source

Enables NAT of the inside source address.

ip nat outside source

Enables NAT of the outside source address.

ip nat pool

Defines a pool of IP addresses for NAT.

ip nat service

Enables a port other than the default port.

show ip nat statistics

Displays NAT statistics.

show ip nat translations redundancy

To display active Network Address Translations (NAT) redundancy information, use the show ip nat translations redundancy command in privileged EXEC mode.

show ip nat translations redundancy rg-id [ verbose ]

Syntax Description

rg-id

Redundancy group (RG) ID. Valid values are 1 and 2.

verbose

(Optional) Displays additional information for each translation table entry, including the time period when the entry was created and the duration for which it was used.

Command Modes

Privileged EXEC (#)

Command History

Release Modification

15.3(2)T

This command was introduced.

Usage Guidelines

Use the show ip nat translations redundancy command to display information about the NAT translations that belong to a specified RG.

Examples

The following is sample output from the show ip nat translations redundancy command for RG ID 1. The output fields are self-explanatory.

Device# show ip nat translations redundancy 1 verbose
--- 10.1.1.2            192.0.2.3            ---                ---
    create 00:00:10, use 00:00:10 timeout:0,
    flags:
static, created-by-local, use_count: 0, router/rg id: 0/1 ha_entry_num: 0 mapp_id[in/out]: 120/0, entry-id: 1, lc_entries: 0



Related Commands

Command

Description

show ip nat redundancy

Displays NAT redundancy information.

show ip nhrp

To display Next Hop Resolution Protocol (NHRP) mapping information, use the show ip nhrp command in user EXEC or privileged EXEC mode.

show ip nhrp [ dynamic | incomplete | static ] [ address | interface ] [ brief | detail ] [purge] [shortcut]

Syntax Description

dynamic

(Optional) Displays dynamic (learned) IP-to-nonbroadcast multiaccess address (NBMA) mapping entries. Dynamic NHRP mapping entries are obtained from NHRP resolution/registration exchanges. See the table below for types, number ranges, and descriptions.

incomplete

(Optional) Displays information about NHRP mapping entries for which the IP-to-NBMA is not resolved. See the table below for types, number ranges, and descriptions.

static

(Optional) Displays static IP-to-NBMA address mapping entries. Static NHRP mapping entries are configured using the ip nhrp map command. See the table below for types, number ranges, and descriptions.

address

(Optional) Displays NHRP mapping entries for specified protocol addresses.

interface

(Optional) Displays NHRP mapping entries for the specified interface. See the table below for types, number ranges, and descriptions.

brief

(Optional) Displays a short output of the NHRP mapping.

detail

(Optional) Displays detailed information about NHRP mapping.

purge

(Optional) Displays NHRP purge information.

shortcut

(Optional) Displays NHRP shortcut information.

Command Modes

User EXEC (>) Privileged EXEC (#)

Command Default

Information is displayed for all NHRP mappings.

Command History

Release

Modification

10.3

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

12.4(22)T

The output of this command was extended to display the NHRP group received from the spoke.

Cisco IOS XE Release 2.5

This command was modified. Support was added for the shortcut keyword.

Usage Guidelines

The table below lists the valid types, number ranges, and descriptions for the optional interface argument.


Note


The valid types can vary according to the platform and interfaces on the platform.


Table 7 Valid Types, Number Ranges, and Interface Description

Valid Types

Number Ranges

Interface Descriptions

async

1

Async

atm

0 to 6

ATM

bvi

1 to 255

Bridge-Group Virtual Interface

cdma-ix

1

CDMA Ix

ctunnel

0 to 2147483647

C-Tunnel

dialer

0 to 20049

Dialer

ethernet

0 to 4294967295

Ethernet

fastethernet

0 to 6

FastEthernet IEEE 802.3

lex

0 to 2147483647

Lex

loopback

0 to 2147483647

Loopback

mfr

0 to 2147483647

Multilink Frame Relay bundle

multilink

0 to 2147483647

Multilink-group

null

0

Null

port-channel

1 to 64

Port channel

tunnel

0 to 2147483647

Tunnel

vif

1

PGM multicast host

virtual-ppp

0 to 2147483647

Virtual PPP

virtual-template

1 to 1000

Virtual template

virtual-tokenring

0 to 2147483647

Virtual Token Ring

xtagatm

0 to 2147483647

Extended tag ATM

Examples

The following is sample output from the show ip nhrpcommand. This output shows the NHRP group received from the spoke:

Router# show ip nhrp
10.0.0.2/32 via 10.0.0.2, Tunnel0 created 00:17:49, expire 00:01:30
  Type: dynamic, Flags: unique registered used 
  NBMA address: 172.17.0.2 
  Group: test-group-0
10.0.0.3/32 via 10.0.0.3, Tunnel0 created 00:00:11, expire 01:59:48
  Type: dynamic, Flags: unique registered used 
  NBMA address: 172.17.0.3 
  Group: test-group-0
11.0.0.2/32 via 11.0.0.2, Tunnel1 created 00:17:49, expire 00:02:10
  Type: dynamic, Flags: unique registered used 
  NBMA address: 172.17.0.2 
  Group: test-group-1

The following is sample output from the show ip nhrp shortcut command:

Router#show ip nhrp shortcut
10.1.1.1/24 via 1.1.1.22 Tunnel0 created 00:00:05, expire 00:02:24
   Type: dynamic, Flags: router rib 
   NBMA address: 10.12.1.1
10.1.1.2/24 via 1.1.1.22 Tunnel0 created 00:00:05, expire 00:02:24
   Type: dynamic, Flags: router rib nho 
   NBMA address: 10.12.1.2

The following is sample output from the show ip nhrp detailcommand:

Router# show ip nhrp detail
10.1.1.1/8 via 10.2.1.1, Tunnel1 created 00:46:29, never expire
  Type: static, Flags: used
  NBMA address: 10.12.1.1
10.1.1.2/8 via 10.2.1.2, Tunnel1 created 00:00:12, expire 01:59:47
  Type: dynamic, Flags: authoritative unique nat registered used
  NBMA address: 10.12.1.2
10.1.1.4, Tunnel1 created 00:00:07, expire 00:02:57
  Type: incomplete, Flags: negative
  Cache hits: 4

The table below describes the significant fields shown in the displays.

Table 8 show ip nhrp Field Descriptions

Field

Description

10.1.1.1/8

Target network.

via 10.2.1.1

Next Hop to reach the target network.

Tunnel1

Interface through which the target network is reached.

created 00:00:12

Length of time since the entry was created (hours:minutes:seconds).

expire 01:59:47

Time remaining until the entry expires (hours:minutes:seconds).

never expire

Indicates that static entries never expire.

Type

  • dynamic--NHRP mapping is obtained dynamically. The mapping entry is created using information from the NHRP resolution and registrations.

  • static--NHRP mapping is configured statically. Entries configured by the ip nhrp map command are marked static.

  • incomplete--The NBMA address is not known for the target network.

NBMA address

Nonbroadcast multiaccess address of the next hop. The address format is appropriate for the type of network being used: ATM, Ethernet, Switched Multimegabit Data Service (SMDS), or multipoint tunnel.

Flags

  • authoritative--Indicates that the NHRP information was obtained directly from the Next Hop Server or router that maintains and is authoritative for the NBMA-to-IP address mapping for a particular destination.

  • implicit--Indicates that the local node learned about the NHRP mapping entries from the source mapping information of an NHRP resolution request received by the local router, or from an NHRP resolution packet being forwarded through the local router.

  • local--Indicates NHRP mapping entries that are for networks local to this router (that is, serviced by this router). These flag entries are created when this router answers an NHRP resolution request that has this information and is used to store the transport (tunnel) IP address of all the other NHRP nodes to which it has sent this information. If for some reason this router loses access to this local network (that is, it can no longer service this network), it sends an NHRP purge message to all remote NHRP nodes that are listed in the “local” entry (in show ip nhrp detail command output) to tell the remote nodes to clear this information from their NHRP mapping tables. This local mapping entry times out of the local NHRP mapping database at the same time that this information (from the NHRP resolution reply) would time out of the NHRP mapping database on the remote NHRP nodes.

  • nat--Indicates that the remote node (NHS client) supports the new NHRP NAT extension type for dynamic spoke-spoke tunnels to/from spokes behind a NAT router. This marking does not indicate that the spoke (NHS client) is behind a NAT router.

Flags (continued)

  • negative--For negative caching, indicates that the requested NBMA mapping has not yet been or could not be obtained. When NHRP sends an NHRP resolution request, an incomplete (negative) NHRP mapping entry for the address is inserted in the resolution request. This insertion suppresses any more triggering of NHRP resolution requests while the resolution request is being resolved. If configured, any encryption parameters (IKE/IPsec) for the tunnel are negotiated.

  • (no socket)--Indicates that the NHRP mapping entries will not trigger IPsec to set up encryption because data traffic does not need to use this tunnel. Later, if data traffic needs to use this tunnel, the flag will change from a “(no socket)” to a “(socket)” entry and IPsec will be triggered to set up the encryption for this tunnel. Local and implicit NHRP mapping entries are always initially marked as “(no socket).” By default, NHRP caches source information from NHRP resolution request or replies as they go through the system. To allow this caching to continue, but not have the entry create an IPsec socket, they are marked as (no socket). If this was not done there would be extra IPsec sockets from the hubs to the various spokes that either were not used or were used for only one or two packets while a direct spoke-to-spoke tunnel was being built. Data packets and NHRP packets that arrive on the tunnel interface and are forwarded back out the tunnel interface are not allowed to use the (no socket) NHRP mappings for forwarding. Because, in this case, the router is an intermediate node in the path between the two endpoints and we only want to create short-cut tunnels between the initial entrance and final exit point of the DMVPN (NBMA) network and not between any intermediate nodes. If at some point the router receives a data packet that has a source interface that is not the tunnel interface and it would use the (no socket) mapping entry, the router converts the (no socket) entry to a (socket) entry. In this case, this router is the entrance (or exit) point of the NBMA (for this traffic stream).

Flags (continued)

  • (no socket) (continued)--These (no socket) mapping entries are marked (non-authoritative); only mappings from NHRP registrations are marked (authoritative). The NHRP resolution requests are also marked (authoritative), which means that the NHRP resolution request can be answered only from an (authoritative) NHRP mapping entry. A (no socket) mapping entry will not be used to answer an NHRP resolution request and the NHRP resolution request will be forwarded to the NHS of the nodes .

  • registered--Indicates that the mapping entry was created in response to an NHRP registration request. Although registered mapping entries are dynamic entries, they may not be refreshed through the “used” mechanism. Instead, these entries are refreshed by another NHRP registration request with the same transport (tunnel) IP to NBMA address mapping. The Next Hop Client (NHC) periodically sends NHRP registration requests to keep these mappings from expiring.

  • router--Indicates that NHRP mapping entries for a remote router (that is accessing a network or host behind the remote router) are marked with the router flag.

  • unique--NHRP registration requests have the unique flag set on by default. This flag indicates that an NHRP mapping entry cannot be overwritten by a mapping entry that has the same IP address and a different NBMA address. When a spoke has a statically configured outside IP (NBMA) address, this is used to keep another spoke that is mis-configured with the same transport (tunnel) IP address from overwriting this entry. If a spoke has a dynamic outside IP (NBMA) address, you can configure the ip nhrp registration no-unique command on the spoke to clear this flag. This configuration allows the registered NHRP mapping entry for that spoke on the hub to be overwritten with a new NBMA address. This is necessary in this case because the spoke's outside IP (NBMA) address can change at any time. If the “unique” flag was set, the spoke would have to wait for the mapping entry on the hub to time out before it could register its new (NBMA) mapping.

Flags (continued)

  • used--When data packets are process-switched and this mapping entry was used, the mapping entry is marked as used. The mapping database is checked every 60 seconds. If the used flag is set and more than 120 seconds remain until expire time, the used flag is cleared. If fewer than 120 seconds are left, this mapping entry is “refreshed” by the transmission of another NHRP resolution request.

Note   

When using DMVPN Phase 3 in 12.4(6)T, CEF switched packets will also set the “used” flag, and these entries will be timed out and refreshed as described in the “used” flag description above.

Related Commands

Command

Description

ip nhrp group

Configures a NHRP group on a spoke.

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

ip nhrp map group

Adds NHRP groups to QoS policy mappings on a hub.

ip nhrp shortcut

Enables shortcut switching on the tunnel interface.

show dmvpn

Displays DMVPN-specific session information.

show ip nhrp group-map

Displays the details of NHRP group mappings on a hub and the list of tunnels using each of the NHRP groups defined in the mappings.

show ip nhrp multicast

Displays NHRP multicast mapping information.

show ip nhrp nhs

Displays NHRP Next Hop Server information.

show ip nhrp summary

Displays NHRP mapping summary information.

show ip nhrp traffic

Displays NHRP traffic statistics.

show policy-map mgre

Displays statistics about a specific QoS policy as it is applied to a tunnel endpoint.

show ip nhrp group-map

To display the details of NHRP group mappings, use the show ip nhrp group-mapcommand in user EXEC or privileged EXEC mode.

show ip nhrp group-map [group-name]

Syntax Description

group-name

(Optional) Name of an NHRP group mapping for which information will be displayed.

Command Default

Information is displayed for all NHRP group mappings.

Command Modes

User EXEC (>) Privileged EXEC (#)

Command History

Release

Modification

12.4(22)T

This command was introduced.

Usage Guidelines

This command displays the details on NHRP group mappings on the hub along with the list of tunnels using each of the NHRP groups defined in the mappings. In combination with the show ip nhrp command, this command lets you easily determine which QoS policy map is applied to a specific tunnel endpoint.

This command displays the details of the specified NHRP group mapping. The details include the associated QoS policy name and the list of tunnel endpoints using the QoS policy. If no option is specified, it displays the details of all NHRP group mappings.

Examples

The following is sample output from the show ip nhrp group-mapcommand:

Router# show ip nhrp group-map
Interface: Tunnel0
 NHRP group: test-group-0
  QoS policy: queueing
  Tunnels using the QoS policy:
  Tunnel destination overlay/transport address
  10.0.0.2/172.17.0.2
  10.0.0.3/172.17.0.3
Interface: Tunnel1
 NHRP group: test-group-1
  QoS policy: queueing
  Tunnels using the QoS policy:
  Tunnel destination overlay/transport address
  11.0.0.2/172.17.0.2
 NHRP group: test-group-2
  QoS policy: p1
  Tunnels using the QoS policy: None

The following is sample output from the show ip nhrp group-mapcommand for an NHRP group named test-group-0:

Router# show ip nhrp group-map test-group-0
Interface: Tunnel0
 NHRP group: test-group-0
  QoS policy: queueing
  Tunnels using the QoS policy:
  Tunnel destination overlay/transport address
  10.0.0.2/172.17.0.2
  10.0.0.3/172.17.0.3

The table below describes the significant fields shown in the displays.

Table 9 show ip nhrp group-map Field Descriptions

Field

Description

Interface

Interface on which the policy is configured.

NHRP group

NHRP group associated with the QoS policy on the interface.

QoS policy

QoS policy configured on the interface.

Tunnels using the QoS Policy

List of tunnel endpoints using the QoS policy.

Tunnel destination overlay/transport address

Tunnel destination overlay address (such as the tunnel endpoint address).

Related Commands

Command

Description

ip nhrp group

Configures a NHRP group on a spoke.

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

ip nhrp map group

Adds NHRP groups to QoS policy mappings on a hub.

show dmvpn

Displays DMVPN-specific session information.

show ip nhrp

Displays NHRP mapping information.

show policy-map mgre

Displays statistics about a specific QoS policy as it is applied to a tunnel endpoint.

show ip nhrp multicast

To display Next Hop Resolution Protocol (NHRP) multicast mapping information, use the show ip nhrp multicast command in user EXEC or privileged EXEC mode.

show ip nhrp multicast [ nbma-address | interface ]

Syntax Description

nbma-address

(Optional) Displays multicast mapping information for the specified NBMA address.

interface

(Optional) Displays all multicast mapping entries of the NHRP network for the interface. See the table below for types, number ranges, and descriptions.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.4(7)

This command was introduced.

Usage Guidelines

The table below lists the valid types, number ranges, and descriptions for the optional interface argument.


Note


The valid types can vary according to the platform and interfaces on the platform.
Table 10 Interface Types, Valid Numbers, and Interface Descriptions

Interface Types

Valid Numbers

Interface Descriptions

async

1

Async

atm

0 to 6

ATM

bvi

1 to 255

Bridge-Group Virtual Interface

cdma-ix

1

CDMA Ix

ctunnel

0 to 2147483647

C-Tunnel

dialer

0 to 20049

Dialer

ethernet

0 to 4294967295

Ethernet

fastethernet

0 to 6

FastEthernet IEEE 802.3

lex

0 to 2147483647

Lex

loopback

0 to 2147483647

Loopback

mfr

0 to 2147483647

Multilink Frame Relay bundle

multilink

0 to 2147483647

Multilink-group

null

0

Null

port-channel

1 to 64

Port channel

tunnel

0 to 2147483647

Tunnel

vif

1

PGM multicast host

virtual-ppp

0 to 2147483647

Virtual PPP

virtual-template

1 to 1000

Virtual template

virtual-tokenring

0 to 2147483647

Virtual Token Ring

xtagatm

0 to 2147483647

Extended tag ATM

Examples

The following is sample output from the show ip nhrp multicast command:

Router# show ip nhrp multicast
  I/F     NBMA address
Tunnel1    1.1.1.1         Flags: static

The table below describes the fields shown in the display.

Table 11 show ip nhrp Field Descriptions

Field

Description

I/F

Interface associated with the multicast mapping entry.

NBMA address

Nonbroadcast Multiaccess Address to which multicast packets will be sent. The address format is appropriate for the type of network used: ATM, Ethernet, SMDS, or multipoint tunnel.

Flags

  • static—Indicates that the multicast mapping entry is configured statically by the ip nhrp map multicast command.

  • dynamic—Indicates that the multicast mapping entry is obtained dynamically. A multicast mapping entry is created for each registered Next Hop Client (NHC) when the ip nhrp map multicast dynamic command is configured.

Related Commands

Command

Description

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

show ip nhrp

Displays NHRP mapping information.

show ip nhrp nhs

Displays NHRP next-hop server information.

show ip nhrp summary

Displays NHRP mapping summary information.

show ip nhrp traffic

Displays NHRP traffic statistics.

show ip nhrp nhs

To display Next Hop Resolution Protocol (NHRP) next hop server (NHS) information, use the show ip nhrp nhscommand in user EXEC or privileged EXEC mode.

show ip nhrp nhs [interface] [detail]

Syntax Description

interface

(Optional) Displays NHS information currently configured on the interface. See the table below for types, number ranges, and descriptions.

detail

(Optional) Displays detailed NHS information.

Command Modes

User EXEC Privileged EXEC

Command History

Release

Modification

10.3

This command was introduced.

12.2(33)SRB

This command was integrated into Cisco IOS release 12.2(33)SRB.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

The table below lists the valid types, number ranges, and descriptions for the optional interfaceargument.


Note


The valid types can vary according to the platform and interfaces on the platform.


Table 12 Valid Types, Number Ranges, and Interface Descriptions

Valid Types

Number Ranges

Interface Descriptions

async

1

Async

atm

0 to 6

ATM

bvi

1 to 255

Bridge-Group Virtual Interface

cdma-ix

1

CDMA Ix

ctunnel

0 to 2147483647

C-Tunnel

dialer

0 to 20049

Dialer

ethernet

0 to 4294967295

Ethernet

fastethernet

0 to 6

FastEthernet IEEE 802.3

lex

0 to 2147483647

Lex

loopback

0 to 2147483647

Loopback

mfr

0 to 2147483647

Multilink Frame Relay bundle

multilink

0 to 2147483647

Multilink-group

null

0

Null

port-channel

1 to 64

Port channel

tunnel

0 to 2147483647

Tunnel

vif

1

PGM multicast host

virtual-ppp

0 to 2147483647

Virtual PPP

virtual-template

1 to 1000

Virtual template

virtual-tokenring

0 to 2147483647

Virtual Token Ring

xtagatm

0 to 2147483647

Extended tag ATM

Examples

The following is sample output from the show ip nhrp nhs detail command:

Router# show ip nhrp nhs detail
Legend:
  E=Expecting replies
  R=Responding
Tunnel1:
  5.1.1.1           E  req-sent 128  req-failed 1  repl-recv 0
Pending Registration Requests:
Registration Request: Reqid 1, Ret 64  NHS 5.1.1.1

The table below describes the significant field shown in the display.

Table 13 show ip nhrp nhs Field Descriptions

Field

Description

Tunnel1

Interface through which the target network is reached.

Related Commands

Command

Description

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

show ip nhrp

Displays NHRP mapping information.

show ip nhrp multicast

Displays NHRP multicast mapping information.

show ip nhrp summary

Displays NHRP mapping summary information.

show ip nhrp traffic

Displays NHRP traffic statistics.

show ip nhrp summary

To display Next Hop Resolution Protocol (NHRP) mapping summary information, use the show ip nhrp summarycommand in user EXEC or privileged EXEC mode.

show ip nhrp summary

Command Modes

User EXEC Privileged EXEC

Command History

Release

Modification

10.3

This command was introduced.

12.2(33)SRB

This command was integrated into Cisco IOS release 12.2(33)SRB.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Examples

The following is sample output from the show ip nhrp summary command:

Router# show ip nhrp summary
IP NHRP cache 1 entry, 256 bytes
    1 static  0 dynamic  0 incomplete

The table below describes the significant field shown in the display.

Table 14 show ip nhrp summary Field Descriptions

Field Output

Description

dynamic

NHRP mapping is obtained dynamically. The mapping entry is created using information from the NHRP resolution and registrations

static

NHRP mapping is configured statically. Entries configured by the ip nhrp map command are marked static.

incomplete

NBMA address is not known for the target network.

Related Commands

Command

Description

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

show ip nhrp

Displays NHRP mapping information.

show ip nhrp multicast

Displays NHRP multicast mapping information.

show ip nhrp nhs

Displays NHRP Next Hop Server information.

show ip nhrp traffic

Displays NHRP traffic statistics.

show ip nhrp traffic

To display Next Hop Resolution Protocol (NHRP) traffic statistics, use the show ip nhrp traffic command in privileged EXEC mode.

show ip nhrp traffic [ interface | { tunnel number | Virtual-Access number } ]

Syntax Description

interface

(Optional) Displays NHRP traffic information for a given interface.

tunnel number

Specifies the tunnel interface number.

Virtual-Access number

Specifies the virtual access interface number.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

10.3

This command was introduced.

12.4(6)T

This command was modified. The show output was enhanced to display information about traffic indication (redirects).

12.4(9)T

This command was modified. The interface and tunnel keywords and the number argument were added.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

15.3(2)T

This command was modified. The Virtual-Access number keyword-argument pair was added.

Usage Guidelines

Replacing ip in the command name with ipv6 clears IPv6-specific traffic.

Examples

The following example shows sample output for NHRP traffic statistics for tunnel interface 0:

Device# show ip nhrp traffic interface tunnel0
Tunnel0: Max-send limit:100Pkts/10Sec, Usage:0%
   Sent: Total 79
         18 Resolution Request  10 Resolution Reply  42 Registration Request  
         0 Registration Reply  3 Purge Request  6 Purge Reply  
         0 Error Indication  0 Traffic Indication  
   Rcvd: Total 69
         10 Resolution Request  15 Resolution Reply  0 Registration Request  
         36 Registration Reply  6 Purge Request  2 Purge Reply  
         0 Error Indication  0 Traffic Indication

The table below describes the significant fields shown in the display.

Table 15 show ip nhrp traffic Field Descriptions

Field

Description

Tunnel0

Interface type and number.

Max-send limit

Maximum number of NHRP messages that can be sent by this station in the given interval.

Resolution Request

Number of NHRP resolution request packets originated from or received by this station.

Resolution Reply

Number of NHRP resolution reply packets originated from or received by this station.

Registration Request

Number of NHRP registration request packets originated from or received by this station.

Registration Reply

Number of NHRP registration reply packets originated from or received by this station.

Purge Request

Number of NHRP purge request packets originated from or received by this station.

Purge Reply

Number of NHRP purge reply packets originated from or received by this station.

Error Indication

Number of NHRP error packets originated from or received by this station.

Traffic Indication

Number of NHRP traffic indication packets (redirects) originated from or received by this station.

Related Commands

Command

Description

debug nhrp condition

Enables NHRP conditional debugging.

debug nhrp error

Enables NHRP error level debugging.

show ip route dhcp

To display the routes added to the routing table by the Dynamic Host Configuration Protocol (DHCP) server and relay agent, use the show ip route dhcp command in privileged EXEC configuration mode.

show ip route [ vrf vrf-name ] dhcp [ip-address]

Syntax Description

vrf

(Optional) Specifies VPN routing and forwarding (VRF) instance.

vrf-name

(Optional) Name of the VRF.

ip-address

(Optional) Address about which routing information should be displayed.

Command Default

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

To display information about global routes, use the show ip route dhcp command. To display routes in the VRF routing table, use the show ip route vrf vrf-name dhcp command.

Examples

The following is sample output from the show ip route dhcpcommand when entered without an address. This command lists all routes added by the DHCP server and relay agent.

Router# show ip route dhcp 
  10.5.5.56/32 is directly connected, ATM0.2
  10.5.5.217/32 is directly connected, ATM0.2

The following is sample output from the show ip route dhcp command when an address is specified. The output shows the details of the address with the server address (who assigned it) and the lease expiration time.

Router# show ip route dhcp 10.5.5.217
 
  10.5.5.217 is directly connected, ATM0.2
    DHCP Server: 10.9.9.10   Lease expires at Nov 08 2001 01:19 PM

The following is sample output from the show ip route vrf vrf-name dhcpcommand when entered without an address:

Router# show ip route vrf abc dhcp
  10.5.5.218/32 is directly connected, ATM0.2

The following is sample output from the show ip route vrf vrf-name dhcpcommand when an address is specified. The output shows the details of the address with the server address (who assigned it) and the lease expiration time.

Router# show ip route vrf red dhcp 10.5.5.218
  10.5.5.218/32 is directly connected, ATM0.2
    DHCP Server: 10.9.9.10   Lease expires at Nov 08 2001 03:15PM

Related Commands

Command

Description

clear ip route dhcp

Removes routes from the routing table added by the DHCP server and relay agent for the DHCP clients on unnumbered interfaces.

show ip snat

To display active Stateful Network Address Translation (SNAT) translations, use the show ip snat command in EXEC mode.

show ip snat [ distributed [verbose] | peer ip-address ]

Syntax Description

distributed

(Optional) Displays information about the distributed NAT, including its peers and status.

verbose

(Optional) Displays additional information for each translation table entry, including how long ago the entry was created and used.

peer ip-address

(Optional) Displays TCP connection information between peer routers.

Command Modes

EXEC

Command History

Release

Modification

12.2(13)T

This command was introduced.

Examples

The following is sample output from the show ip snat distributed command for stateful NAT connected peers:

Router# show ip snat distributed
Stateful NAT Connected Peers
SNAT: Mode PRIMARY
:State READY
:Local Address 192.168.123.2
:Local NAT id 100
:Peer Address 192.168.123.3
:Peer NAT id 200
:Mapping List 10

The following is sample output from the show ip snat distributed verbosecommand for stateful NAT connected peers:

Router# show ip snat distributed verbose
SNAT: Mode PRIMARY
Stateful NAT Connected Peers
:State READY
:Local Address 192.168.123.2
:Local NAT id 100
:Peer Address 192.168.123.3
:Peer NAT id 200
:Mapping List 10
:InMsgs 7, OutMsgs 7, tcb 0x63EBA408, listener 0x0

show ip source binding

To display IP-source bindings configured on the system, use the show ip source command command in privileged EXEC mode.

show ip source binding [ip-address] [mac-address] [ dhcp-snooping | static ] [ vlan vlan-id ] [ interface type mod/port ]

Syntax Description

ip-address

(Optional) Binding IP address.

mac-address

(Optional) Binding MAC address.

dhcp-snooping

(Optional) Specifies DHCP snooping binding entry.

static

(Optional) Specifies a static binding entry.

vlan vlan-id

(Optional) Specifies the Layer 2 VLAN identification; valid values are from 1 to 4094.

interface type

(Optional) Interface type; possible valid values are fastethernet, gigabitethernet, tengigabitethernet, port-channel num, and vlan vlan-id.

mod / port

Module and port number.

Command Default

Both static and DHCP-snooping bindings are displayed.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2(33)SXH

This command was introduced.

Usage Guidelines

Each optional parameter is used to filter the display output.

Examples

This example shows the output without entering any keywords:

Router# show ip source binding

MacAddress             IpAddress       Lease(sec) Type          VLAN Interface
------------------     --------------- ---------- ------------- ---- --------------------
00:00:00:0A:00:0B      17.16.0.1        infinite   static        10   FastEthernet6/10
00:00:00:0A:00:0A      17.16.0.2        10000      dhcp-snooping 10   FastEthernet6/11

This example shows how to display the static IP binding entry for a specific IP address:

Router# show ip source binding 17.16.0.1 0000.000A.000B static vlan 10 interface gigabitethernet6/10
MacAddress          IpAddress        Lease(sec)  Type           VLAN  Interface 
------------------  ---------------  ----------  -------------  ----  -------------------- 
00:00:00:0A:00:0B   17.16.0.1         infinite    static         10    FastEthernet6/10 

The table below describes the significant fields in the display.

Table 16 show ip source binding Field Descriptions

Field

Description

MAC Address

Client hardware MAC address.

IP Address

Client IP address assigned from the DHCP server.

Lease (seconds)

IP address lease time.

Type

Binding type; static bindings configured from CLI to dynamic binding learned from DHCP snooping.

VLAN

VLAN number of the client interface.

Interface

Interface that connects to the DHCP client host.

Related Commands

Command

Description

ip source binding

Adds or deletes a static IP source binding entry.

ip verify source vlan dhcp-snooping

Enables or disables the per 12-port IP source guard.

show ip verify source

Displays the IP source guard configuration and filters on a particular interface.

show ip verify source

To display the IP source guard configuration and filters on a particular interface, use the show ip verify source command in EXEC mode.

show ip verify source [ interface type mod/port ] [ efp_id efp_id ]

Syntax Description

interface type

(Optional) Specifies the interface type; possible valid values are fastethernet, gigabitethernet, tengigabitethernet, port-channel num, and vlan vlan-id.

mod / port

Module and port number.

efp_id

(Optional) Specifies the Ethernet flow point (EFP) (service instance) ID.

efp_id

EFP number; range is 1 to 8000.

Command Default

This command has no default settings.

Command Modes

EXEC (#)

Command History

Release

Modification

12.2(33)SXH

This command was introduced.

12.2(33)SRD

The efp_id efp_idkeyword and argument were added.

Usage Guidelines

Enable port security first because the DHCP security MAC filter cannot apply to the port or VLAN.

Examples

This example shows the display when DHCP snooping is enabled on VLANs 10 to 20, the interface has IP source filter mode that is configured as IP, and there is an existing IP address binding 10.0.0.1 on VLAN 10:

Router# show ip verify source interface gigabitethernet6/1
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/1      ip           active       10.0.0.1                         10
gi6/1      ip           active       deny-all     			               11-20

This example shows how to display the IP source guard configuration and filters on a specific interface:

Router# show ip verify source interface gigabitethernet6/1
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/1      ip           inactive-trust-port

This example shows the display when the interface does not have a VLAN enabled for DHCP snooping:

Router# show ip verify source interface gigabitethernet6/3
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/3      ip           inactive-no-snooping-vlan

This example shows the display when the interface has an IP source filter mode that is configured as IP MAC and an existing IP MAC binds 10.0.0.2/aaaa.bbbb.cccc on VLAN 10 and 10.0.0.1/aaaa.bbbb.cccd on VLAN 11:

Router# show ip verify source interface gigabitethernet6/4
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/4      ip-mac       active       10.0.0.2         aaaa.bbbb.cccc  10
gi6/4      ip-mac       active       10.0.0.1         aaaa.bbbb.cccd  11
gi6/4      ip-mac       active       deny-all         deny-all        12-20

This example shows the display when the interface has an IP source filter mode that is configured as IP MAC and an existing IP MAC binding 10.0.0.3/aaaa.bbbb.ccce on VLAN 10, but port security is not enabled on the interface:

Router# show ip verify source interface gigabitethernet6/5
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/5      ip-mac       active       10.0.0.3         permit-all      10
gi6/5      ip-mac       active       deny-all         permit-all      11-20

This example shows the display when the interface does not have IP source filter mode configured:

Router# show ip verify source interface gigabitethernet6/6
DHCP security is not configured on the interface gi6/6.

This example shows how to display all the interfaces on the switch that have DHCP snooping security enabled:

Router# show ip verify source
 
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
gi6/1      ip           active       10.0.0.1                         10
gi6/1      ip           active       deny-all                         11-20
gi6/2      ip           inactive-trust-port
gi6/3      ip           inactive-no-snooping-vlan
gi6/4      ip-mac       active       10.0.0.2         aaaa.bbbb.cccc  10
gi6/4      ip-mac       active       11.0.0.1         aaaa.bbbb.cccd  11
gi6/4      ip-mac       active       deny-all         deny-all        12-20
gi6/5      ip-mac       active       10.0.0.3         permit-all      10
gi6/5      ip-mac       active       deny-all         permit-all      11-20
Router# 

This example shows how to display all the interfaces on the switch that have DHCP snooping security enabled:

Router# show ip verify source interface gi5/0/0 efp_id 10
Interface  Filter-type  Filter-mode  IP-address       Mac-address        Vlan        EFP ID
---------    -----------    -----------      ---------------     -----------------     ----------  ----------
Gi5/0/0    ip-mac       active          123.1.1.1        00:0A:00:0A:00:0A  100        10  
Gi5/0/0    ip-mac       active          123.1.1.2        00:0A:00:0A:00:0B  100        20  
Gi5/0/0    ip-mac       active          123.1.1.3        00:0A:00:0A:00:0C  100        30  

Related Commands

Command

Description

ip source binding

Adds or deletes a static IP source binding entry.

ip verify source vlan dhcp-snooping

Enables or disables the per l2-port IP source guard.

show ip source binding

Displays the IP-source bindings configured on the system.

show ipv6 dhcp

To display the Dynamic Host Configuration Protocol (DHCP) unique identifier (DUID) on a specified device, use the show ipv6 dhcp command in user EXEC or privileged EXEC mode.

show ipv6 dhcp

Syntax Description

This command has no arguments or keywords.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(4)T

This command was introduced.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

12.2(33)SRE

This command was modified. It was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The show ipv6 dhcp command uses the DUID based on the link-layer address for both client and server identifiers. The device uses the MAC address from the lowest-numbered interface to form the DUID. The network interface is assumed to be permanently attached to the device. Use the show ipv6 dhcp command to display the DUID of a device.

Examples

The following is sample output from the show ipv6 dhcpcommand. The output is self-explanatory:

Router# show ipv6 dhcp 
This device's DHCPv6 unique identifier(DUID): 000300010002FCA5DC1C

show ipv6 dhcp binding

To display automatic client bindings from the Dynamic Host Configuration Protocol (DHCP) for IPv6 server binding table, use the show ipv6 dhcp binding command in user EXEC or privileged EXEC mode.

show ipv6 dhcp binding [ipv6-address] [ vrf vrf-name ]

Syntax Description

ipv6-address

(Optional) The address of a DHCP for IPv6 client.

vrf vrf-name

(Optional) Specifies a virtual routing and forwarding (VRF) configuration.

Command Modes


User EXEC (>)
Privileged EXEC (#)

Command History

Release

Modification

12.3(4)T

This command was introduced.

12.4

This command was modified. Command output was updated to display a PPP username associated with a binding.

12.4(24)T

This command was modified. Command output was updated to display address bindings.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

15.1(2)S

This command was modified. The vrf vrf-name keyword and argument were added.

Cisco IOS XE Release 3.3S

This command was modified. The vrf vrf-name keyword and argument were added.

Usage Guidelines

The show ipv6 dhcp binding command displays all automatic client bindings from the DHCP for IPv6 server binding table if the ipv6-address argument is not specified. When the ipv6-address argument is specified, only the binding for the specified client is displayed.

If the vrf vrf-namekeyword and argument combination is specified, all bindings that belong to the specified VRF are displayed.

Examples

The following sample output displays all automatic client bindings from the DHCP for IPv6 server binding table:

Router# show ipv6 dhcp binding
Client: FE80::A8BB:CCFF:FE00:300 
  DUID: 00030001AABBCC000300
  Username : client_1
  Interface: Virtual-Access2.1
  IA PD: IA ID 0x000C0001, T1 75, T2 135
    Prefix: 2001:380:E00::/64
            preferred lifetime 150, valid lifetime 300
            expires at Dec 06 2007 12:57 PM (262 seconds)
Client: FE80::A8BB:CCFF:FE00:300 (Virtual-Access2.2) 
  DUID: 00030001AABBCC000300
  IA PD: IA ID 0x000D0001, T1 75, T2 135
    Prefix: 2001:0DB8:E00:1::/64
            preferred lifetime 150, valid lifetime 300
            expires at Dec 06 2007 12:58 PM (288 seconds)

The table below describes the significant fields shown in the display.

Table 17 show ipv6 dhcp binding Field Descriptions

Field

Description

Client

Address of a specified client.

DUID

DHCP unique identifier (DUID).

Virtual-Access2.1

First virtual client. When an IPv6 DHCP client requests two prefixes with the same DUID but a different identity association for prefix delegation (IAPD ) on two different interfaces, these prefixes are considered to be for two different clients, and interface information is maintained for both.

Username : client_1

The username associated with the binding.

IA PD

Collection of prefixes assigned to a client.

IA ID

Identifier for this IAPD.

Prefix

Prefixes delegated to the indicated IAPD on the specified client.

preferred lifetime, valid lifetime

The preferred lifetime and valid lifetime settings, in seconds, for the specified client.

Expires at

Date and time at which the valid lifetime expires.

Virtual-Access2.2

Second virtual client. When an IPv6 DHCP client requests two prefixes with the same DUID but different IAIDs on two different interfaces, these prefixes are considered to be for two different clients, and interface information is maintained for both.

When the DHCPv6 pool on the Cisco IOS DHCPv6 server is configured to obtain prefixes for delegation from an authentication, authorization, and accounting (AAA) server, it sends the PPP username from the incoming PPP session to the AAA server for obtaining the prefixes. The PPP username is associated with the binding is displayed in output from the show ipv6 dhcp binding command. If there is no PPP username associated with the binding, this field value is displayed as "unassigned."

The following example shows that the PPP username associated with the binding is "client_1":

Router# show ipv6 dhcp binding
Client: FE80::2AA:FF:FEBB:CC 
  DUID: 0003000100AA00BB00CC 
  Username : client_1
  Interface : Virtual-Access2
  IA PD: IA ID 0x00130001, T1 75, T2 135
    Prefix: 2001:0DB8:1:3::/80
            preferred lifetime 150, valid lifetime 300
            expires at Aug 07 2008 05:19 AM (225 seconds)

The following example shows that the PPP username associated with the binding is unassigned:

Router# show ipv6 dhcp binding 
Client: FE80::2AA:FF:FEBB:CC 
  DUID: 0003000100AA00BB00CC 
  Username : unassigned 
  Interface : Virtual-Access2 
  IA PD: IA ID 0x00130001, T1 150, T2 240 
    Prefix: 2001:0DB8:1:1::/80 
            preferred lifetime 300, valid lifetime 300 
            expires at Aug 11 2008 06:23 AM (233 seconds) 

Related Commands

Command

Description

clear ipv6 dhcp binding

Deletes automatic client bindings from the DHCP for IPv6 binding table.

show ipv6 dhcp conflict

To display address conflicts found by a Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server when addresses are offered to the client, use the show ipv6 dhcp conflict command in privileged EXEC mode.

show ipv6 dhcp conflict [ipv6-address] [ vrf vrf-name ]

Syntax Description

ipv6-address

(Optional) The address of a DHCP for IPv6 client.

vrf vrf-name

(Optional) Specifies a virtual routing and forwarding (VRF) configuration.

Command Modes


Privileged EXEC (#)

Command History

Release

Modification

12.4(24)T

This command was introduced.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

15.1(2)S

This command was modified. The vrf vrf-name keyword and argument were added.

Cisco IOS XE Release 3.3S

This command was modified. The vrf vrf-name keyword and argument were added.

Cisco IOS XE Release 3.2SE

This command was integrated into Cisco IOS XE Release 3.2SE.

Usage Guidelines

When you configure the DHCPv6 server to detect conflicts, it uses ping. The client uses neighbor discovery to detect clients and reports to the server through a DECLINE message. If an address conflict is detected, the address is removed from the pool, and the address is not assigned until the administrator removes the address from the conflict list.

Examples

The following is a sample output from the show ipv6 dhcp conflict command. This command shows the pool and prefix values for DHCP conflicts.:

Router# show ipv6 dhcp conflict
Pool 350, prefix 2001:0DB8:1005::/48
	    2001:0DB8:1005::10

Related Commands

Command

Description

clear ipv6 dhcp conflict

Clears an address conflict from the DHCPv6 server database.

show ipv6 dhcp database

To display the Dynamic Host Configuration Protocol (DHCP) for IPv6 binding database agent information, use the show ipv6 dhcp database command in user EXEC or privileged EXEC mode.

show ipv6 dhcp database [agent-URL]

Syntax Description

agent-URL

(Optional) A flash, NVRAM, FTP, TFTP, or remote copy protocol (RCP) uniform resource locator.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(4)T

This command was introduced.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

Usage Guidelines

Each permanent storage to which the binding database is saved is called the database agent. An agent can be configured using the ipv6 dhcp database command. Supported database agents include FTP and TFTP servers, RCP, Flash file system, and NVRAM.

The show ipv6 dhcp databasecommand displays DHCP for IPv6 binding database agent information. If the agent-URL argument is specified, only the specified agent is displayed. If the agent-URL argument is not specified, all database agents are shown.

Examples

The following is sample output from the show ipv6 dhcp databasecommand:

Router# show ipv6 dhcp database 
Database agent tftp://172.19.216.133/db.tftp:
  write delay: 69 seconds, transfer timeout: 300 seconds
  last written at Jan 09 2003 01:54 PM,
     write timer expires in 56 seconds
  last read at Jan 06 2003 05:41 PM
  successful read times 1
  failed read times 0
  successful write times 3172
  failed write times 2
Database agent nvram:/dhcpv6-binding:
  write delay: 60 seconds, transfer timeout: 300 seconds
  last written at Jan 09 2003 01:54 PM,
     write timer expires in 37 seconds
  last read at never
  successful read times 0
  failed read times 0
  successful write times 3325
  failed write times 0
Database agent flash:/dhcpv6-db:
  write delay: 82 seconds, transfer timeout: 3 seconds
  last written at Jan 09 2003 01:54 PM,
    write timer expires in 50 seconds
  last read at never
  successful read times 0
  failed read times 0
  successful write times 2220
  failed write times 614

The table below describes the significant fields shown in the display.

Table 18 show ipv6 dhcp database Field Descriptions

Field

Description

Database agent

Specifies the database agent.

Write delay

The amount of time (in seconds) to wait before updating the database.

transfer timeout

Specifies how long (in seconds) the DHCP server should wait before aborting a database transfer. Transfers that exceed the timeout period are aborted.

Last written

The last date and time bindings were written to the file server.

Write timer expires...

The length of time, in seconds, before the write timer expires.

Last read

The last date and time bindings were read from the file server.

Successful/failed read times

The number of successful or failed read times.

Successful/failed write times

The number of successful or failed write times.

Related Commands

Command

Description

ipv6 dhcp database

Specifies DHCP for IPv6 binding database agent parameters.

show ipv6 dhcp guard policy

To display Dynamic Host Configuration Protocol for IPv6 (DHCPv6) guard information, use the show ipv6 dhcp guard policy command in privileged EXEC mode.

show ipv6 dhcp guard policy [policy-name]

Syntax Description

policy-name

(Optional) DHCPv6 guard policy name.

Command Modes


Privileged EXEC (#)

Command History

Release

Modification

15.2(4)S

This command was introduced.

Usage Guidelines

If the policy-name argument is specified, only the specified policy information is displayed. If the policy-name argument is not specified, information is displayed for all policies.

Examples

The following is sample output from the show ipv6 dhcp guard guard command:

        
	
Router#show ipv6 dhcp guard policy

Dhcp guard policy: default
        Device Role: dhcp client
        Target: Et0/3 

Dhcp guard policy: test1
        Device Role: dhcp server
        Target: vlan 0    vlan 1    vlan 2    vlan 3    vlan 4   
        Max Preference: 200
        Min Preference: 0
        Source Address Match Access List: acl1
        Prefix List Match Prefix List: pfxlist1

Dhcp guard policy: test2
        Device Role: dhcp relay
        Target: Et0/0 Et0/1 Et0/2 


      

The table below describes the significant fields shown in the display.

Table 19 show ipv6 dhcp guard Field Descriptions

Field

Description

Device Role

The role of the device. The role is either client, server or relay.

Target

The name of the target. The target is either an interface or a VLAN.

Related Commands

Command

Description

ipv6 dhcp guard policy

Defines the DHCPv6 guard policy name.

show ipv6 dhcp-ldra

To display configuration details and statistics for a Lightweight DHCPv6 Relay Agent (LDRA), use the show ipv6 dhcp-ldra command in user EXEC or privileged EXEC mode.

show ipv6 dhcp-ldra [statistics]

Syntax Description

statistics

(Optional) Displays LDRA-related statistics.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release Modification

15.1(2)SG

This command was introduced.

Cisco IOS XE Release 3.4SG

This command was integrated into Cisco IOS XE Release 3.4SG.

Usage Guidelines

Use this command to view the number and type of DHCPv6 packets received or processed, the number and type of DHCPv6 messages dropped, error counters, and the interface state (client-facing trusted interface, server-facing interface, and so on).

You can also view LDRA configuration details, such as the type of LDRA configuration and the interface or VLAN where the LDRA is configured.

Examples

The following sample output displays LDRA configuration details before initiating a DHCP session. The fields in the example below are self-explanatory.

Device> enable
Device # show ipv6 dhcp-ldra statistics 


                DHCPv6 LDRA client facing statistics.

Messages received                0
Messages sent                    0
Messages discarded               0

                DHCPv6 LDRA server facing statistics.

Messages received                0
Messages sent                    0
Messages discarded               0

The following sample output displays LDRA configuration details after initiating a DHCP session. The fields in the example below are self-explanatory.

Device> enable

Device # show ipv6 dhcp-ldra statistics

 
                  DHCPv6 LDRA client facing statistics.

Messages received                2
Messages sent                    2
Messages discarded               0

Messages                         Received
SOLICIT                          1
REQUEST                          1

Messages                         Sent
RELAY-FORWARD                    2

                DHCPv6 LDRA server facing statistics.


Messages received                2
Messages sent                    2
Messages discarded               0

Messages                         Received
RELAY-REPLY                      2

Messages                         Sent
ADVERTISE                        1
REPLY                            1

The following sample output displays LDRA configuration details. The fields in the example below are self-explanatory.

Device> enable
Device # show ipv6 dhcp-ldra



DHCPv6 LDRA is Enabled.
DHCPv6 LDRA policy: client-facing-disable
       Target: none
DHCPv6 LDRA policy: client-facing-trusted
       Target: vlan 5
DHCPv6 LDRA policy: client-facing-untrusted
       Target: none
DHCPv6 LDRA policy: server-facing
       Target: Gi1/0/7

Related Commands

Command

Description

ipv6 dhcp-ldra

Enables LDRA functionality on an access node.

ipv6 dhcp ldra attach-policy

Enables LDRA functionality on a VLAN.

ipv6 dhcp-ldra attach-policy

Enables LDRA functionality on an interface.

show ipv6 dhcp pool

To display Dynamic Host Configuration Protocol (DHCP) for IPv6 configuration pool information, use the show ipv6 dhcp pool command in user EXEC or privileged EXEC mode.

show ipv6 dhcp pool [poolname]

Syntax Description

poolname

(Optional) User-defined name for the local prefix pool. The pool name can be a symbolic string (such as "Engineering") or an integer (such as 0).

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(4)T

This command was introduced.

12.4(24)T

Command output was updated to display address pools and prefix pools.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

12.2(33)SRE

This command was modified. It was integrated into Cisco IOS Release 12.2(33)SRE.

12.2(33)XNE

This command was modified. It was integrated into Cisco IOS Release 12.2(33)XNE.

Usage Guidelines

Use the ipv6 dhcp pool command to create a configuration pool, and use the ipv6 dhcp server command to associate the configuration pool with a server on an interface.

The show ipv6 dhcp pool command displays DHCP for IPv6 configuration pool information. If the poolname argument is specified, only information on the specified pool is displayed. If the poolname argument is not specified, information about all pools is shown.

Examples

The following sample output displays DHCP for IPv6 configuration pool information:

Router# show ipv6 dhcp pool
 
DHCPv6 pool: svr-p1
  Static bindings:
    Binding for client 000300010002FCA5C01C
      IA PD: IA ID 00040002, 
        Prefix: 3FFE:C00:C18:3::/72
                preferred lifetime 604800, valid lifetime 2592000
      IA PD: IA ID not specified; being used by 00040001
        Prefix: 3FFE:C00:C18:1::/72
                preferred lifetime 240, valid lifetime 54321
        Prefix: 3FFE:C00:C18:2::/72
                preferred lifetime 300, valid lifetime 54333
        Prefix: 3FFE:C00:C18:3::/72
                preferred lifetime 280, valid lifetime 51111
  Prefix from pool: local-p1, Valid lifetime 12345, Preferred lifetime 180
  DNS server: 1001::1
  DNS server: 1001::2
  Domain name: example1.net
  Domain name: example2.net
  Domain name: example3.net
Active clients: 2

The table below describes the significant fields shown in the display.

Table 20 show ipv6 dhcp pool Field Descriptions

Field

Description

DHCPv6 pool: svr-p1

The name of the pool.

IA PD

Identity association for prefix delegation (IAPD), which is a collection of prefixes assigned to a client.

IA ID

Identifier for this IAPD.

Prefix

Prefixes to be delegated to the indicated IAPD on the specified client.

preferred lifetime, valid lifetime

Lifetimes, in seconds, associated with the prefix statically assigned to the specified client.

DNS server

IPv6 addresses of the DNS servers.

Domain name

Displays the DNS domain search list.

Active clients

Total number of active clients.

Related Commands

Command

Description

ipv6 dhcp pool

Configures a DHCP for IPv6 configuration information pool and enters DHCP for IPv6 pool configuration mode.

ipv6 dhcp server

Enables DHCP for IPv6 service on an interface.

show ipv6 dhcp interface

To display Dynamic Host Configuration Protocol (DHCP) for IPv6 interface information, use the show ipv6 dhcp interface command in user EXEC or privileged EXEC mode.

show ipv6 dhcp interface [ type number ]

Syntax Description

type number

(Optional) Interface type and number. For more information, use the question mark (?) online help function.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(4)T

This command was introduced.

12.3(11)T

Command output was modified to allow relay agent information to be displayed on a specified interface if the relay agent feature is configured on that interface.

12.4(24)T

Command output was updated to display interface address assignments and T1 and T2 renew/rebind times.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

12.2(33)SRE

This command was modified. It was integrated into Cisco IOS Release 12.2(33)SRE.

12.2(33)XNE

This command was modified. It was integrated into Cisco IOS Release 12.2(33)XNE.

Usage Guidelines

If no interfaces are specified, all interfaces on which DHCP for IPv6 (client or server) is enabled are shown. If an interface is specified, only information about the specified interface is displayed.

Examples

The following is sample output from the show ipv6 dhcp interfacecommand. In the first example, the command is used on a router that has an interface acting as a DHCP for IPv6 server. In the second example, the command is used on a router that has an interface acting as a DHCP for IPv6 client:

Router1# show ipv6 dhcp interface
Ethernet2/1 is in server mode
  Using pool: svr-p1
  Preference value: 20
  Rapid-Commit is disabled
Router2# show ipv6 dhcp interface
Ethernet2/1 is in client mode
  State is OPEN (1)
  List of known servers:
    Address: FE80::202:FCFF:FEA1:7439, DUID 000300010002FCA17400
    Preference: 20
      IA PD: IA ID 0x00040001, T1 120, T2 192
        Prefix: 3FFE:C00:C18:1::/72
                preferred lifetime 240, valid lifetime 54321
                expires at Nov 08 2002 09:10 AM (54319 seconds)
        Prefix: 3FFE:C00:C18:2::/72
                preferred lifetime 300, valid lifetime 54333
                expires at Nov 08 2002 09:11 AM (54331 seconds)
        Prefix: 3FFE:C00:C18:3::/72
                preferred lifetime 280, valid lifetime 51111
                expires at Nov 08 2002 08:17 AM (51109 seconds)
      DNS server: 1001::1
      DNS server: 1001::2
      Domain name: domain1.net
      Domain name: domain2.net 
      Domain name: domain3.net
    Prefix name is cli-p1
    Rapid-Commit is enabled

The table below describes the significant fields shown in the display.

Table 21 show ipv6 dhcp interface Field Descriptions

Field

Description

Ethernet2/1 is in server/client mode

Displays whether the specified interface is in server or client mode.

Preference value:

The advertised (or default of 0) preference value for the indicated server.

Prefix name is cli-p1

Displays the IPv6 general prefix pool name, in which prefixes successfully acquired on this interface are stored.

Using pool: svr-p1

The name of the pool that is being used by the interface.

State is OPEN

State of the DHCP for IPv6 client on this interface. "Open" indicates that configuration information has been received.

List of known servers

Lists the servers on the interface.

Address, DUID

Address and DHCP unique identifier (DUID) of a server heard on the specified interface.

Rapid commit is disabled

Displays whether the rapid-commit keyword has been enabled on the interface.

The following example shows the DHCP for IPv6 relay agent configuration on FastEthernet interface 0/0, and use of the show ipv6 dhcp interface command displays relay agent information on FastEthernet interface 0/0:

Router(config-if)# ipv6 dhcp relay destination FE80::250:A2FF:FEBF:A056 FastEthernet0/1
Router# show ipv6 dhcp interface FastEthernet 0/0
FastEthernet0/0 is in relay mode 
  Relay destinations:
    FE80::250:A2FF:FEBF:A056 via FastEthernet0/1 

Related Commands

Command

Description

ipv6 dhcp client pd

Enables the DHCP for IPv6 client process and enables requests for prefix delegation through a specified interface.

ipv6 dhcp relay destination

Specifies a destination address to which client messages are forwarded and enables DHCP for IPv6 relay service on the interface.

ipv6 dhcp server

Enables DHCP for IPv6 service on an interface.

show ipv6 dhcp relay binding

To display DHCPv6 Internet Assigned Numbers Authority (IANA) and DHCPv6 Identity Association for Prefix Delegation (IAPD) bindings on a relay agent, use the show ipv6 dhcp relay binding command in user EXEC or privileged EXEC mode.

show ipv6 dhcp relay binding [ vrf vrf-name ]

Syntax Description

vrf vrf-name

(Optional) Specifies a virtual routing and forwarding (VRF) configuration.

Command Modes


User EXEC (>)
Privileged EXEC (#)

Command History

Release

Modification

15.1(2)S

This command was introduced.

Cisco IOS XE Release 3.3S

This command was integrated into Cisco IOS XE Release 3.3S.

15.2(1)S

This command was modified. In addition to DHCPv6 IAPD bindings, DHCPv6 IANA bindings on a relay agent can be displayed.

Cisco IOS XE Release 3.5S

This command was modified. In addition to DHCPv6 IAPD bindings, DHCPv6 IANA bindings on a relay agent can be displayed.

12.2(33)SCF4

This command was implemented on Cisco uBR10012 and Cisco uBR7200 series universal broadband devices.

15.3(3)M

This command was integrated into Cisco IOS Release 15.3(3)M.

Usage Guidelines

If the vrf vrf-name keyword-argument pair is specified, all bindings belonging to the specified VRF are displayed.


Note


Only the DHCPv6 IAPD bindings on a relay agent are displayed on the Cisco uBR10012 and Cisco uBR7200 series universal broadband devices.


Examples

The following is sample output from the show ipv6 dhcp relay binding command:

Device# show ipv6 dhcp relay binding

The following example shows output from the show ipv6 dhcp relay binding command with a specified VRF name on a Cisco uBR10012 universal broadband device:

Device# show ipv6 dhcp relay binding vrf vrf1

Prefix: 2001:DB8:0:1:/64 (Bundle100.600)
  DUID: 000300010023BED94D31
  IAID: 3201912114
  lifetime: 600

The table below describes the significant fields shown in the display.

Table 22 show ipv6 dhcp relay binding Field Descriptions

Field

Description

Prefix

IPv6 prefix for DHCP.

DUID

DHCP Unique Identifier (DUID) for the IPv6 relay binding.

IAID

Identity Association Identification (IAID) for DHCP.

lifetime

Lifetime of the prefix, in seconds.

Related Commands

Command

Description

clear ipv6 dhcp relay binding

Clears a specific IPv6 address or IPv6 prefix of a DHCP for IPv6 relay binding.

show ipv6 dhcp route

To display routes added by Dynamic Host Configuration Protocol for IPv6 (DHCPv6) on the DHCPv6 server for Internet Assigned Numbers Authority (IANA) and Identity Association for Prefix Delegation (IAPD), use the show ipv6 dhcp route command in privileged EXEC mode.

show ipv6 dhcp route { vrf vrf-name } { * | ipv6-address | ipv6-prefix }

Syntax Description

vrf vrf-name

Specifies a virtual routing and forwarding (VRF) configuration.

*

Displays all the DHCPv6 relay bindings.

ipv6-address

DHCPv6 address.

ipv6-prefix

IPv6 prefix.

Command Modes


Privileged EXEC (#)

Command History

Release

Modification

15.2(1)S

This command was introduced.

Cisco IOS XE Release 3.5S

This command was integrated into Cisco IOS XE Release 3.5S.

Examples

The following is sample output from the show ipv6 dhcp route command:

Router# show ipv6 dhcp route vrf vrfname 2001:0DB8:3333:4::5/126

Related Commands

Command

Description

ipv6 dhcp iana-route-add

Adds routes for individually assigned IPv6 addresses on a relay or server.

ipv6 dhcp iapd-route-add

Enables route addition by the DHCPv6 relay and server for the delegated prefix.

show ipv6 nat statistics

To display Network Address Translation--Protocol Translation (NAT-PT) statistics, use the show iv6 nat statisticscommand in user EXEC or privileged EXEC mode.

show ipv6 nat statistics

Syntax Description

This command has no arguments or keywords.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(13)T

This command was introduced.

Examples

The following is sample output from the show ipv6 nat statisticscommand:

Router# show ipv6 nat statistics
Total active translations: 4 (2 static, 2 dynamic; 2 extended) 
NAT-PT interfaces: 
  Ethernet3/1, Ethernet3/3 
Hits: 1  Misses: 1 
Expired translations: 0 

The table below describes the significant fields shown in the display.

Table 23 show ipv6 nat statistics Field Descriptions

Field

Description

Total active translations

Number of translations active in the system. This number increments by one each time a translation is created and is decremented each time a translation is cleared or times out. Displays the numbers for each type of translation.

NAT-PT interfaces

The interfaces, by type and number, that are configured to run NAT-PT translations.

Hits

Number of times the software does a translations table lookup and finds an entry.

Misses

Number of times the software does a translations table lookup, fails to find an entry, and must try to create one.

Expired translations

Cumulative count of translations that have expired since the router was booted.

Related Commands

Command

Description

show ipv6 nat translations

Displays active NAT-PT translations.

show ipv6 nat translations

To display active Network Address Translation--Protocol Translation (NAT-PT) translations, use the show ip nat translations command in user EXEC or privileged EXEC mode.

show ipv6 nat translations [ icmp | tcp | udp ] [verbose]

Syntax Description

icmp

(Optional) Displays detailed information about NAT-PT ICMP translation events.

tcp

(Optional) Displays detailed information about NAT-PT TCP translation events.

udp

(Optional) Displays detailed information about NAT-PT User Datagram Protocol (UDP) translation events.

verbose

(Optional) Displays additional information for each translation table entry, including how long ago the entry was created and used.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(13)T

This command was introduced.

Examples

The following is sample output from the show ip nat translations command. Two static translations have been configured between an IPv4 source address and an IPv6 destination, and vice versa.

Router# show ipv6 nat translations
Prot  IPv4 source              IPv6 source 
      IPv4 destination         IPv6 destination 
---   ---                      --- 
      192.168.123.2            2001::2 
---   ---                      --- 
      192.168.122.10           2001::10 
tcp   192.168.124.8,11047      3002::8,11047 
      192.168.123.2,23         2001::2,23 
udp   192.168.124.8,52922      3002::8,52922 
      192.168.123.2,69         2001::2,69 
udp   192.168.124.8,52922      3002::8,52922 
      192.168.123.2,52922      2001::2,52922 
---   192.168.124.8            3002::8 
      192.168.123.2            2001::2 
---   192.168.124.8            3002::8 
      ---                      --- 
---   192.168.121.4            5001::4 
      ---                      ---

The following is sample output that includes the verbose keyword:

Router# show ipv6 nat translations verbose
Prot  IPv4 source              IPv6 source 
      IPv4 destination         IPv6 destination 
---   ---                      --- 
      192.168.123.2            2001::2 
      create 00:04:24, use 00:03:24, 
---   ---                      --- 
      192.168.122.10           2001::10 
      create 00:04:24, use 00:04:24, 
tcp   192.168.124.8,11047      3002::8,11047 
      192.168.123.2,23         2001::2,23 
      create 00:03:24, use 00:03:20, left 00:16:39, 
udp   192.168.124.8,52922      3002::8,52922 
      192.168.123.2,69         2001::2,69 
      create 00:02:51, use 00:02:37, left 00:17:22, 
udp   192.168.124.8,52922      3002::8,52922 
      192.168.123.2,52922      2001::2,52922 
      create 00:02:48, use 00:02:30, left 00:17:29, 
---   192.168.124.8            3002::8 
      192.168.123.2            2001::2 
      create 00:03:24, use 00:02:34, left 00:17:25, 
---   192.168.124.8            3002::8 
      ---                      --- 
      create 00:04:24, use 00:03:24, 
---   192.168.121.4            5001::4 
      ---                      --- 
      create 00:04:25, use 00:04:25,

The table below describes the significant fields shown in the display.

Table 24 show ipv6 nat translations Field Descriptions

Field

Description

Prot

Protocol of the port identifying the address.

IPv4 source/IPv6 source

The IPv4 or IPv6 source address to be translated.

IPv4 destination/IPv6 destination

The IPv4 or IPv6 destination address.

create

How long ago the entry was created (in hours:minutes:seconds).

use

How long ago the entry was last used (in hours:minutes:seconds).

left

Time before the entry times out (in hours:minutes:seconds).

Related Commands

Command

Description

clear ipv6 nat translation

Clears dynamic NAT-PT translations from the translation state table.

show logging ip access-list

To display information about the logging IP access list, use the show logging ip access-list command in privileged EXEC mode.

show logging ip access-list { cache | config }

Syntax Description

cache

Displays information about all the entries in the Optimized ACL Logging (OAL) cache.

config

Displays information about the logging IP access-list configuration.

Command Default

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2(17d)SXB

Support for this command was introduced on the Supervisor Engine 720.

12.2(18)SXE

This command was changed to include the config keyword on the Supervisor Engine 720 only.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

Usage Guidelines

This command is supported on Cisco 7600 series routers that are configured with a Supervisor Engine 720 only.

OAL is supported on IPv4 unicast traffic only.

Examples

This example shows how to display all the entries in the OAL cache:

Router# show logging ip access-list cache
Matched flows: 
id prot src_ip dst_ip sport dport status count 
total lastlog 
--------------------------------------------------------------------------------------
1 17 10.2.1.82 10.2.12.2 111 63 Permit 0 
3906 2d02h 
2 17 10.2.1.82 10.2.12.2 1135 63 Permit 0 
3906 2d02h 
3 17 10.2.1.82 10.2.12.2 2159 63 Permit 0 
3906 2d02h 
4 17 10.2.1.82 10.2.12.2 3183 63 Permit 0 
3906 2d02h 
5 17 10.2.1.82 10.2.12.2 4207 63 Permit 0 
3906 2d02h 
6 17 10.2.1.82 10.2.12.2 5231 63 Deny 0 
3906 2d02h 
7 17 10.2.1.82 10.2.12.2 6255 63 Deny 0 
3906 2d02h 
8 17 10.2.1.82 10.2.12.2 7279 63 Permit 0 
3906 2d02h 
9 17 10.2.1.82 10.2.12.2 8303 63 Permit 0 
3906 2d02h 
10 17 10.2.1.82 10.2.12.2 9327 63 Permit 0 
3905 2d02h 
11 17 10.2.1.82 10.2.12.2 10351 63 Permit 0 
3905 2d02h 
12 17 10.2.1.82 10.2.12.2 11375 63 Permit 0 
3905 2d02h 
13 17 10.2.1.82 10.2.12.2 12399 63 Deny 0 
3905 2d02h 
14 17 10.2.1.82 10.2.12.2 13423 63 Permit 0 
3905 2d02h 
15 17 10.2.1.82 10.2.12.2 14447 63 Deny 0 
3905 2d02h 
16 17 10.2.1.82 10.2.12.2 15471 63 Permit 0 
3905 2d02h 
17 17 10.2.1.82 10.2.12.2 16495 63 Permit 0 
3905 2d02h 
18 17 10.2.1.82 10.2.12.2 17519 63 Permit 0 
3905 2d02h 
19 17 10.2.1.82 10.2.12.2 18543 63 Permit 0 
3905 2d02h 
20 17 10.2.1.82 10.2.12.2 19567 63 Permit 0 
3905 2d02h
Number of entries: 20 
Number of messages logged: 112 
Number of packets logged: 11200 
Number of packets received for logging: 11200

This example shows how to display information about the logging IP access-list configuration:

Router# show logging ip access-list config 
Logging ip access-list configuration
 Maximum number of cached entries: 8192
 Logging rate limiter: 0
 Log-update interval: 300
 Log-update threshold: 0
 Configured on input direction:
        Vlan2
        Vlan1
 Configured on output direction:
        Vlan2

Related Commands

Command

Description

clear logging ip access-list cache

Clears all the entries from the OAL cache and sends them to the syslog.

logging ip access-list cache (global configuration)

Configures the OAL parameters.

logging ip access-list cache (interface configuration)

Enables an OAL-logging cache on an interface that is based on direction.

show mdns cache

To display multicast Domain Name System (mDNS) cache information, use the show mdns cache command in user EXEC or privileged EXEC mode.

show mdns cache [ interface type number [ detail] | [ name record-name] [ type record-type] [ detail]]

Syntax Description

interface type number

(Optional) Displays mDNS cache information for the specified interface.

detail
(Optional) Displays detailed mDNS cache information for the specified interface or record.
Note   

You can use the detail keyword for a specific interface, record or type. You cannot use it independently with the show mdns cache command.

name record-name

(Optional) Displays mDNS cache information for the specified record.

type record-type

(Optional) Displays mDNS cache information for the specific record type.


Note


You can view mDNS cache information for a specific record type and record name by using the keyword-argument pair combination name record-name type record-type.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.2(1)E

This command was introduced.

Examples

The following sample output displays mDNS cache information :

Device> enable
Device# show mdns cache 


mDNS CACHE
=================================
 [<NAME>] [<TYPE>][<CLASS>] [<TTL>/Remaining] [Accessed] [If-index] [<RR Record Data>]

 _services._dns-sd._udp.local PTR IN 4500/4496 0 3 _ipp._tcp.local

 _ipp._tcp.local PTR IN 4500/4496 1 3 printer1._ipp._tcp.local

 printer1._ipp._tcp.local TXT IN 4500/4496 1 3 (1)''


 

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns requests

Displays mDNS request information.

show mdns statistics

Displays mDNS statistics for the specified service-list.

show mdns cache mac

To display multicast Domain Name System (mDNS) cache information for a specific MAC address, use the show mdns cache mac command in user EXEC or privileged EXEC mode.

show mdns cache mac mac-address [ detail]

Syntax Description

mac-address

Displays mDNS cache information for the specified MAC address.

detail

(Optional) Displays detailed mDNS cache information for the specified MAC address.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Examples

The following is sample output from the show mdns cache mac command:

Device> enable
Device# show mdns cache mac aabb.cc01.2c10

mDNS CACHE
===================================

[<NAME>]                                             [<TYPE>][<CLASS>] [<TTL>/Remaining] [Accessed] [If-name] [Mac Address] [<RR Record Data>]
_mdnsgateway._udp.local                                 PTR     IN      1200/1200         1          0                       mdnsgateway-Et0/1._mdnsgateway._udp.local


 

The table below describes the significant fields in the display.

Table 25 show mdns cache mac Field Descriptions

Field

Description

[<NAME>]

Service instance. The service instance is of the specified service type.

[<TYPE>]

Service type.

[<CLASS>]

DNS class. IN refers to the internet class resource record.

[<TTL>/Remaining]

Time to Live (TTL) value of the service.

[If-name]

Interface name.

[Mac Address]

MAC address of the device.

[<RR Record Data>]

Resource record data. The data includes service instance information and the interface name.

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns cache

Displays mDNS cache information for the device.

show mdns cache static

Displays mDNS service instance records in cache that are statically registered.

show mdns cache static

To display multicast Domain Name System (mDNS) service instance records in cache that are statically registered, use the show mdns cache static command in user EXEC or privileged EXEC mode.

show mdns cache static

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Examples

The following is sample output from the show mdns cache static command:

Device> enable
Device# show mdns cache static

mDNS CACHE
===================================

[<NAME>]                                             [<TYPE>][<CLASS>] [<TTL>/Remaining] [Accessed] [If-name] [Mac Address] [<RR Record Data>]
_mdnsgateway._udp.local                                 PTR     IN      1200/1200       1       0               mdnsgateway-Et0/1._mdnsgateway._udp.local
_mdnsgateway._udp.local                                 PTR     IN       600/600        1       0               mdnsgateway._mdnsgateway._udp.local

 

The table below describes the significant fields in the display.

Table 26 show mdns cache static Field Descriptions

Field

Description

[<NAME>]

Service instance. The service instance is of the specified service type.

[<TYPE>]

Service type.

[<CLASS>]

DNS class. IN refers to the internet class resource record.

[<TTL>/Remaining]

Time to Live (TTL) value of the service.

[If-name]

Interface name.

[Mac Address]

MAC address of the device.

[<RR Record Data>]

Resource record data. The data includes service instance information and the interface name.

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns cache

Displays mDNS cache information for the device.

show mdns cache mac

Displays mDNS cache information for a specific MAC address.

show mdns requests

To display multicast Domain Name System (mDNS) request information, use the show mdns requests command in privileged EXEC mode.

show mdns requests [ detail | [ type record-type] [ name record-name]]

Syntax Description

detail

(Optional) Displays detailed mDNS request information, including record name, record type, and record class.

name record-name

(Optional) Displays mDNS request information for the specified record.

type record-type

(Optional) Displays mDNS request information for a specific record type.
Note   

For the record-type argument, you must specify one of these record types - PTR, SRV, A, or AAAA.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

15.2(1)E

This command was introduced.

Examples

The following sample output displays detailed mDNS request information :

Device> enable
Device# show mdns requests detail


MDNS Outstanding Requests
=================================
Request name  :   _ipp._tcp.local
Request type  :   PTR
Request class :   IN

 

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns cache

Displays mDNS cache information.

show mdns statistics

Displays mDNS statistics for the specified service-list.

show mdns service-types

To display multicast Domain Name System (mDNS) service type information for device interfaces, use the show mdns service-types command in user EXEC or privileged EXEC mode.

show mdns service-types [ all | interface type number]

Syntax Description

all

(Optional) Displays mDNS service type information for all device interfaces.

interface type number

(Optional) Displays mDNS service type information for the specified interface.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Examples

The following is sample output from the show mdns service-types command:

Device> enable
Device# show mdns service-types 


mDNS SERVICES
=================================
[<NAME>]            [<TTL>/Remaining] [If-name]

_ipp._tcp.local     4500/4496    


 

The table below describes the significant fields in the display.

Table 27 show mdns service-types Field Descriptions

Field

Description

[<NAME>]

Service instance. The service instance is of the specified service type.

[<TTL>/Remaining]

Time to Live (TTL) value of the service.

[If-name]

Interface name.

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns requests

Displays mDNS request information.

show mdns statistics

Displays mDNS statistics for the specified service-list.

show mdns statistics

To display multicast Domain Name System (mDNS) statistics, use the show mdns statistics command in user EXEC or privileged EXEC mode.

show mdns statistics { all | interface type number | service-list name | [ cache | service-policy] { all | interface type number} | services orderby providers}

Syntax Description

all

Displays mDNS statistics for the device or service-policy.

interface type number

Displays mDNS statistics or service-policy statistics for the specified interface.

service-list name

Displays mDNS statistics for the specified service-list.

cache

Displays mDNS cache statistics.

service-policy

Displays mDNS service-policy statistics.

services orderby providers

Displays the number of services learnt from each client. The services are displayed in the descending order; the client from which most number of services are learnt is displayed first on the list, and so on.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.2(1)E

This command was introduced.

15.2(2)E

This command was modified. The keyword-argument pair service-list name and the option to display mDNS statistics for an interface were added. The keywords cache and services orderby providers were added.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Usage Guidelines

The all keyword can be used in two forms of the show mdns statistics command. You can view mDNS statistics for the device using the show mdns statistics all command form. To view service-policy statistics, use the show mdns statistics service-policy all command form.

The keyword-argument pair interface type number can be used in two forms of the show mdns statistics command. To display mDNS statistics for a specific interface, use the show mdns statistics interface type number command form. To display service-policy statistics for a specific interface, use the show mdns statistics service-policy interface type number command form.

Examples

The following sample output displays detailed mDNS statistics:

Device> enable
Device# show mdns statistics all


 mDNS Statistics
=================================
 mDNS packets sent : 0
 mDNS packets received : 31
 mDNS packets dropped : 8
 mDNS cache memory in use: 64264(bytes)

 

Related Commands

Command

Description

service-list mdns-sd

Creates a service-list and applies a filter on the service-list or associates a query for the service-list.

show mdns cache

Displays mDNS cache information.

show mdns requests

Displays mDNS request information.

show nat64

To display Network Address Translation 64 (NAT64) information, use the show nat64 command in user EXEC or privileged EXEC mode.

show nat64 { logging | services | timeouts | reconciliation | replications }

Syntax Description

logging

Displays NAT64 logging information.

services

Displays NAT64 services information.

timeouts

Displays statistics for a NAT64 translation session timeout.

reconciliation

Displays NAT64 reconciliation information.

replications

Displays NAT64 replication information.

Command Modes

User EXEC (>)

Privileged EXEC(#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Cisco IOS XE Release 3.7S

This command was modified. The reconciliation and replications keywords were added.

15.4(1)T

This command was integrated into Cisco IOS Release 15.4(1)T

Usage Guidelines

NAT64 supports logging of information about all NAT sessions that are created and deleted. All event entries that are logged have a time stamp. Use the output of this command verify your NAT64 configuration.

The output of the show nat64 reconciliation command displays information about Forwarding Processor (FP) switchovers. Whenever an FP does a switchover, the Route Processor (RP) and the newly active FP audit their own configuration and alias data to ensure that the RP and the newly active FP are synchronized.

Replication indicates whether the traffic to a port is replicated or not. The show nat64 replications command displays the state of any port that needs to be treated specially for replication. By default, HTTP (port 80) sessions are not synchronized.

Examples

The following is sample output from the show nat64 logging command:

Device# show nat64 logging

NAT64 Logging Type
   Method          Protocol Dst. Address    Dst. Port Src. Port

translation
   flow export     UDP      10.1.1.1         5000      60087    

      

The table below describes the significant fields shown in the display.

Table 28 show nat64 logging Field Descriptions

Field

Description

Method

Method used for logging records. Depending on your release, only flow export is supported.

Protocol

Protocol used for translation.

Dst. Address

Destination IPv4 address of the external collector that is configured for logging records.

Dst. Port

Destination port of the external collector that is configured for logging records.

Src. Port

Source port from where logging records are sent out on the network.

The following is sample output from the show nat64 services command:

Device# show nat64 services

NAT64 Services

ftp
   UDP Enabled: TRUE
   TCP Enabled: TRUE
   Service Definition
   Protocol: 6 Port: 21

      

The table below describes the significant fields shown in the display.

Table 29 show nat64 services Field Descriptions

Field

Description

UDP Enabled

Indicates whether the service translation is enabled by default for UDP packets if the protocol is supported by the service definition.

TCP Enabled

Indicates whether the service translation is enabled by default for TCP packets if the protocol is supported by the service definition.

Service Definition

Definition of the service (the Protocol and Port fields for which packets are considered a match to the given service).

The following is sample output from the show nat64 timeouts command:

Device# show nat64 timeouts

NAT64 Timeout
   Seconds     CLI Cfg Uses 'All' all flows
   86400       FALSE   FALSE      udp
   300         FALSE   TRUE       tcp
   7200        FALSE   TRUE       tcp-transient
   240         FALSE   FALSE      icmp
   60          FALSE   TRUE      


      

The table below describes the significant fields shown in the display.

Table 30 show nat64 timeouts Field Descriptions

Field

Description

Seconds

NAT64 timeout, in seconds.

CLI Cfg

Indicates whether the timeout is explicitly configured through the CLI. The timeout values configured through the CLI change the default timeout values.

The following is sample output from the show nat64 reconciliation command:

Device# show nat64 reconciliation

 Reconciliation Info

   Start updates received: 0
   End updates received: 0
   Last update received: --- (2)

The table below describes the significant fields shown in the display.

Table 31 show nat64 reconciliation Field Descriptions

Field

Description

Start updates received

Indicates the number of synchronization events that are started.

End updates received

Indicates the number of synchronization events that are completed.

Last updated received

Indicates which event was received last—the start or end event.

The following is sample output from the show nat64 replications command:

Device# show nat64 replications

 Replications configured for http: 1

 NAT64 Replications (ports not shown have replication enabled)
 Traffic Type     Port  Replication User-Configured

 http             80    disable     FALSE

The table below describes the significant fields shown in the display.

Table 32 show nat64 reconciliation Field Descriptions

Field

Description

Traffic type

Type of traffic.

Port

Layer 4 port of the traffic.

Replication

Indicates whether the traffic will be replicated or not. Valid values are enable (replicated) or disable (not replicated).

User-Configured

Indicates whether the replication is because of the default behavior (FALSE) of the traffic or user configuration (TRUE).

Related Commands

Command

Description

nat64 logging

Enables NAT64 logging.

nat64 service ftp

Enables NAT64 FTP service.

nat64 translation

Enables NAT64 translation.

show nat64 adjacency

To display information about the stateless Network Address Translation 64 (NAT64) managed adjacencies, use the show nat64 adjacency command in user EXEC or privileged EXEC mode.

show nat64 adjacency { all | count | ipv4 | ipv6 }

Syntax Description

all

Displays all adjacencies.

count

Displays the adjacency count.

ipv4

Displays IPv4 adjacencies.

ipv6

Displays IPv6 adjacencies.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.2S

This command was introduced.

15.4(1)T

This command was integrated into Cisco IOS Release 15.4(1)T.

Usage Guidelines

An adjacency is a node that can be reached by one Layer 2 hop. The stateless NAT64 adjacencies include adjacency addresses and the total number of adjacencies.

Examples

The following is sample output from the show nat64 adjacency all command:

Device# show nat64 adjacency all
 
Adjacency Counts
 IPv4 Adjacencies: 2
 IPv6 Adjacencies: 1
 Stateless Prefix Adjacency Ref Count: 1
Adjacencies
 IPv6 Adjacencies
    ::42
 IPv4 Adjacencies
    0.0.19.137 (5001)
    0.0.19.140 (5004)

The table below describes the significant fields shown in the display.

Table 33 show nat64 adjacency all Field Descriptions

Field

Description

Adjacency Counts

Count of all adjacencies.

Adjacencies

Types of adjacencies.

Related Commands

Command

Description

nat64 enable

Enables stateless NAT64 on an interface.

show nat64 aliases

To display the IP aliases created by Network Address Translation 64 (NAT64), use the show nat64 aliases command in user EXEC or privileged EXEC mode.

show nat64 aliases [ range lower-address-range upper-address-range ]

Syntax Description

range

(Optional) Displays information about the IP aliases in a given range.

lower-address-range

(Optional) IPv4 lower address range.

upper-address-range

(Optional) IPv4 upper address range.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

An alias is an address (examples of an address are pool addresses and static mapping addresses) for which the router sends an Address Resolution Protocol (ARP) request even though the address is not configured on an interface. NAT64 maintains a database of all the addresses for which an ARP request is sent. These addresses are inserted in the database as IP aliases when they exist on the subnet of an interface address.

Examples

The following is sample output from the show nat64 aliases command:

Device# show nat64 aliases

Aliases configured: 1

Address   Table ID Inserted  Flags  Send ARP Reconcilable Stale Ref-Count

10.1.1.1    0        FALSE   0x0030 FALSE    TRUE         FALSE 1  
      
      

The table below describes the significant fields shown in the display.

Table 34 show nat64 aliases Field Descriptions

Field

Description

Aliases configured

The number of NAT64 addresses for which an IP alias is configured.

Address

IPv4 address of the alias.

Table ID

VPN routing and forwarding (VRF) table ID that is associated with the alias.

Inserted

Indicates whether the alias is currently inserted as an IP alias.

Send ARP

Indicates whether an ARP request is sent. Valid values are TRUE or FALSE.

Related Commands

Command

Description

nat64 enable

Enables NAT64 on an interface.

show nat64 ha status

To display information about the stateless Network Address Translation 64 (NAT64) high availability (HA) status, use the show nat64 ha statuscommand in user EXEC or privileged EXEC mode.

show nat64 ha status

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>) Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.2S

This command was introduced.

Examples

The following is sample output from the show nat64 ha status command:

Router# show nat64 ha status
NAT64 HA Status
 Role: active
 Peer is ready: TRUE
 Peer is compatible: TRUE
 Synchronization enabled: TRUE
 Is hot (standby): FALSE
 Bulk sync PID: NO_PROCESS
 ISSU negotiation status: IPC, CF
 ISSU context IDs: IPC(198), CF(197)
 Synchronization capabilities: 0x00000001
  Adjacency mappings: TRUE
 CF info: handle(0x0000011B), peer ready(TRUE), 
  flow control(TRUE)(FALSE)(0x0)
 Initialized: HA(TRUE) ISSU(TRUE)
 Message stats:
  Adjacency mapping: rx(0) tx(5001) tx err(0)
  Bulk sync done: rx(0) tx(1) tx err(0)
 Errors:
  Bulk sync: 0
  CF tx: 0

The table below describes the significant fields shown in the display.

Table 35 show nat64 ha status Field Descriptions

Field

Description

NAT64 HA Status

Status of stateless NAT64 HA.

Message stats

Status of the messages.

Errors

Types of errors.

Related Commands

Command

Description

clear nat64 ha statistics

Clears stateless NAT64 HA statistics.

nat64 enable

Enables stateless NAT64 on an interface.

show nat64 limits

To display Network Address Translation 64 (NAT64) limits, use the show nat64 limits command in user EXEC or privileged EXEC mode.

show nat64 limits

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

The show nat64 limits command displays the configured maximum limit for the number of entries that NAT64 translates.

Examples

The following is sample output from the show nat64 limits command:

Device# show nat64 limits

NAT64 Limit     Max Entries Is Configured

global          200         TRUE         

      

The table below describes the fields shown in the display.

Table 36 show nat64 limits Field Descriptions

Field

Description

NAT64 Limit

Indicates whether the NAT64 translation limit is configured globally or on an interface.

Max Entries

The maximum number of entries that NAT64 translates.

Is Configured

Indicates whether the maximum limit is configured. Valid values are True or False.

Related Commands

Command

Description

nat64 enable

Enables NAT64 on an interface.

nat64 translation

Enables NAT64 translation.

show nat64 map-t

To display Network Address Translation 64 (NAT64) mapping of addresses and ports (MAP-T) information, use the show nat64 map-t command in privileged EXEC mode.

show nat64 map-t [ domain number ]

Syntax Description

domain number

Displays MAP-T information for a specific domain. Valid values for the number argument are from 1 to 128.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.8S

This command was introduced.

Usage Guidelines

MAP-T or Mapping of address and port (MAP) double stateless translation-based solution (MAP-T) provides IPv4 hosts connectivity to and across an IPv6 domain. MAP-T builds on existing stateless IPv4/IPv6 address translation techniques that are specified in RFC 6052, RFC 6144, and RFC 6145.

Examples

The following is sample output from the show nat64 map-t domaincommand:

Device# show nat64 map-t domain 89

MAP-T Domain 89
   Mode MAP-T
   Default-mapping-rule
      Ip-v6-prefix ::/0
   Basic-mapping-rule
      Ip-v6-prefix ::/0
      Ip-v4-prefix 10.1.1.1/32
      Port-parameters
         Share-ratio 34   Contiguous-ports 64   Start-port 3455
         Share-ratio-bits 6   Contiguous-ports-bits 6   Port-offset-bits 4
      

The

Related Commands

Command

Description

nat64 map-t

Configures NAT64 MAP-T settings

show nat64 mappings dynamic

To display the Network Address Translation 64 (NAT64) dynamic mappings, use the show nat64 mappings dynamic command in user EXEC or privileged EXEC mode.

show nat64 mappings dynamic [ list acl-name | pool pool-name ]

Syntax Description

list acl-name

(Optional) Displays the mappings of a specified access list.

pool pool-name

(Optional) Displays the mappings of a specified pool.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

Dynamic one-to-one mapping is used to map IPv6 hosts from a pool of available IPv4 addresses on a first-come first-served basis. The dynamic one-to-one configuration is deployed when the number of IPv6 hosts is few and an equal or greater number of public IPv4 addresses are available. For dynamic binds, the mapping is always between an IPv4 address and an IPv6 address.

Examples

The following is sample output from the show nat64 mappings dynamic command:

Device# show nat64 mappings dynamic
	
Dynamic mappings configured: 1

Direction       ACL         Pool        Flags

v6v4            mylist      mypool      0x00000000 (none) 

      

The table below describes the significant fields shown in the display.

Table 37 show nat64 mappings dynamic Field Descriptions

Field

Description

Dynamic mappings configured

The number of dynamic mappings configured.

Direction

The direction in which the dynamic mapping is configured.

ACL

Access list name.

Pool

Name of the pool.

Related Commands

Command

Description

nat64 v4v6

Translates an IPv4 source address to an IPv6 source address and an IPv6 destination address to an IPv4 destination address for NAT64.

nat64 v6v4

Translates an IPv6 source address to an IPv4 source address and an IPv4 destination address to an IPv6 destination address for NAT64.

show nat64 pools

To display the IPv4 address pools for dynamic Network Address Translation 64 (NAT64) mapping, use the show nat64 pools command in user EXEC or privileged EXEC mode.

show nat64 pools [ name pool-name | range lower-address-range upper-address-range ] [ routes ]

Syntax Description

name pool-name

(Optional) Displays information about the configured address pools listed by the pool name.

range

(Optional) Displays information about address pools within a provided address range.

lower-address-range

(Optional) IPv4 lower address range.

upper-address-range

(Optional) IPv4 upper address range.

routes

(Optional) Displays static routes for a given pool.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

Pools allow you to specify an IPv4 address range that is used for dynamic mapping of objects. Only IPv4 address pools and one contiguous address range per pool object is supported in Cisco IOS XE Release 3.4S. When a pool is created, a static route is installed for all addresses in the pool range.

Examples

The following is sample output from the show nat64 pools command:

Device# show nat64 pools

Pools configured: 1

Protocol Name    Is Single    Range                   Ranges

IPv4     mypool   TRUE        (10.1.1.1 - 10.1.1.10)  10.1.1.1 - 10.1.1.10

      

The table below describes the fields shown in the display.

Table 38 show nat64 pools Field Descriptions

Field

Description

Protocol

Name of the protocol.

Name

Name of the configured pool.

Is Single

Indicates whether the pool contains a single address range or multiple address ranges. The value of the range is displayed.

In Cisco IOS XE Release 3.4S only a single address range is supported.

Range

IPv4 address range.

Ranges

All address ranges for the pool.

In Cisco IOS XE Release 3.4S only a single address range is supported.

Related Commands

Command

Description

nat64 enable

Enables NAT64 on an interface.

nat64 v4

Enables NAT64 IPv4 configuration.

show nat64 prefix stateful

To display information about Network Address Translation 64 N(AT64) stateful prefixes, use the show nat64 prefix stateful command in user EXEC or privileged EXEC mode.

show nat64 prefix stateful { global | { interfaces | static-routes } [ prefix ipv6-address/prefix-length ] }

Syntax Description

global

Displays information about global prefixes.

interfaces

Displays information about the configured interfaces.

prefix

(Optional) Displays information about interfaces that use a prefix.

ipv6-address

(Optional) IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

/prefix-length

(Optional) Length of the IPv6 prefix. Prefix length is a decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). A slash mark must precede the decimal value. Valid values are from 0 to 128.

static-routes

Displays information about prefix static routes.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

A maximum of one global stateful prefix and one stateful prefix per interface is supported. NAT64 uses the configured stateful prefix to algorithmically translate the IPv4 addresses of the IPv4 hosts to and from IPv6 addresses. If a global stateful prefix or an interface stateful prefix is not configured, the Well Known Prefix (WKP) of 64:ff9b::/96 is used to translate the IPv4 address of the IPv4 host.

Examples

The following is sample output from the show nat64 prefix stateful global command:

Device# show nat64 prefix stateful global
      

Global Stateful Prefix: is valid, 2001:DB8::/96

IFs Using Global Prefix    Gi0/1/0

The following is sample output from the show nat64 prefix stateful interfaces command:

Device# show nat64 prefix stateful interfaces

Stateful Prefixes


Interface    											NAT64        Enabled 			Global Prefix

GigabitEthernet0/1/0    TRUE          TRUE      2001:DB8:1:1/96
GigabitEthernet0/1/3    TRUE          FALSE     2001:DB8:2:2/96

The following is sample output from the show nat64 prefix stateful static-routes command:

Device# show nat64 prefix stateful static-routes

Stateful Prefixes


NAT64 Prefix    Static Route  Ref-Count

2001:DB8:1:1/96   1
2001:DB8:2:1/96   1

The table below describes the significant fields shown in the display.

Table 39 show nat6 prefix stateful Field Descriptions

Field

Description

IFs Using Global Prefix

Lists the interfaces that are using the specified global prefix.

Enabled

Information on whether NAT64 is enabled on a route. TRUE if enabled and FALSE if not enabled.

Static Route

IPv6 static route that is configured to route packets.

Related Commands

Command

Description

nat64 prefix stateful

Configures a prefix and prefix length for stateful NAT64.

show nat64 prefix stateless

To display information about the configured Network Address Translation 64 (NAT64) stateless prefixes, use the show nat64 prefix statelesscommand in user EXEC or privileged EXEC mode.

show nat64 prefix stateless { global | { interfaces | static-routes } [ prefix ipv6-prefix/prefix-length ] }

Syntax Description

global

Displays the global stateless prefixes.

interfaces

Displays the interfaces and the stateless prefixes used by the interfaces.

prefix

(Optional) Displays the interfaces that are using a specific stateless prefix.

static-routes

Displays the static routes that are using the stateless prefix.

ipv6-prefix

(Optional) IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

/ prefix-length

(Optional) Length of the IPv6 prefix. Prefix length is a decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). A slash mark must precede the decimal value. Valid values are from 0 to 128.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.2S

This command was introduced.

15.4(1)T

This command was integrated into Cisco IOS Release 15.4(1)T.

Usage Guidelines

The output of the show nat64 prefix stateless command displays the interfaces that use a specific prefix and the number of prefixes that use a static route.

Examples

The following is sample output from the show nat64 prefix stateless globalcommand:

Device# show nat64 prefix stateless global
Global Prefix: is valid, 2001::/96
IFs Using Global Prefix
   Fa0/3/4
   Fa0/3/5

The table below describes the significant fields shown in the display.

Table 40 show nat64 prefix stateless global Field Descriptions

Field

Description

Global Prefix

IPv6 stateless prefix configured at the global level.

IFs Using Global Prefix

Lists the interfaces that are using the specified global prefix.

The following is sample output from the show nat64 prefix stateless interfacescommand.

Device# show nat64 prefix stateless interfaces
 
Interface           NAT64 Enabled    Global    Stateless Prefix
FastEthernet0/3/4   TRUE             FALSE     2001::/96

The table below describes the significant fields shown in the display.

Table 41 show nat64 prefix stateless interfaces Field Descriptions

Field

Description

Interface

Interface name and number.

NAT64 Enabled

Information on whether NAT64 is enabled on a route. TRUE if enabled and FALSE if not enabled.

Global

Information on whether a global prefix is used. TRUE if the global prefix is used and FALSE if the interface prefix is used.

Stateless Prefix

Stateless prefix used for NAT64 translation.

The following is sample output from the show nat64 prefix stateless static-routescommand. The output fields are self-explanatory.

Device# show nat64 prefix stateless static-routes
 
Stateless            Prefix Static Route Ref Count
2001::/96               1

Related Commands

Command

Description

nat64 prefix

Assigns a global or interface-specific NAT64 stateless prefix.

show nat64 routes

To display information about the configured Network Address Translation 64 (NAT64) routes, use the show nat64 routescommand in privileged EXEC mode.

show nat64 routes [ adjacency address | interface type number | prefix prefix-length ]

Syntax Description

adjacency

(Optional) Displays the route for an adjacency address.

address

(Optional) Adjacency address for lookup.

interface

(Optional) Displays routes pointing to an interface.

type

(Optional) Interface type. For more information, use the question mark (?) online help function.

number

(Optional) Interface or subinterface number. For more information about the numbering syntax for your networking device, use the question mark (?) online help function.

prefix

(Optional) Displays the route of an IPv4 prefix.

prefix-length

(Optional) Length of the IPv4 prefix. A decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address).

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.2S

This command was introduced.

15.4(1)T

This command was integrated into Cisco IOS Release 154(1)T.

Usage Guidelines

The output of the show nat64 routes command displays the stateless prefix and adjacency used by the routes and information on whether the routes are enabled.

Examples

The following is sample output from the show nat64 routes command:

Device# show nat64 routes
IPv4 Prefix           Adj. Address    Enabled   Output IF    Global    IPv6 Prefix
192.0.2.1/24          0.0.19.137      FALSE     Fa0/3/4
198.51.100.253/24     0.0.19.140      TRUE      Fa0/3/0      FALSE     3001::/96

The table below describes the significant fields shown in the display.

Table 42 show nat64 routes Field Descriptions

Field

Description

IPv4 Prefix

Prefix used by the IPv4 address.

Adj. Address

Adjacency address.

Enabled

Information about whether NAT64 is enabled on a route. TRUE if enabled and FALSE if not enabled.

Output IF

Output interfaces.

Global

Information about whether a global prefix is used. TRUE if the global prefix is used and FALSE if the interface prefix is used.

Related Commands

Command

Description

nat64 route

Specifies the NAT64 stateless prefix to which an IPv4 prefix should be translated.

show nat64 services

To display the Network Address Translation (NAT64) services, use the show nat64 services command in user EXEC or privileged EXEC mode.

show nat64 services

Syntax Description

This command has no arguments or keywords.

Command Default

This command has no default settings.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Usage Guidelines

Cisco IOS XE Release 3.4S supports only FTP service.

Examples

The following is sample output from the show nat64 services command:

Device# show nat64 services

NAT64 Services

ftp
   UDP Enabled: TRUE
   TCP Enabled: TRUE
   Service Definition
   Protocol: 6 Port: 21

      

The table below describes the significant fields shown in the display.

Table 43 show nat64 services Field Descriptions

Field

Description

UDP Enabled

Indicates whether service translation is enabled by default for UDP packets, if the protocol is supported by the service definition.

TCP Enabled

Indicates whether the service translation is enabled by default for TCP packets, if the protocol is supported by the service definition.

Service Definition

The definition of the service (the protocol and port fields for which packets are considered a match to the given service).

Related Commands

Command

Description

nat64 service ftp

Enables NAT64 FTP service.

show nat64 statistics

To display Network Address Translation 64 (NAT64) packet count statistics, use the show nat64 statisticscommand in user EXEC or privileged EXEC mode.

show nat64 statistics [ global | interface type number | limit | mapping dynamic [ acl acl-name pool pool-name | poolpool-name ] | prefix stateful ipv6-prefix/prefix-length | stateless ]

Syntax Description

global

(Optional) Displays global NAT64 statistics.

interface

(Optional) Displays statistics for an interface.

type

(Optional) Interface type. For more information, use the question mark (?) online help function.

number

(Optional) Interface or subinterface number. For more information about the numbering syntax for your networking device, use the question mark (?) online help function.

limit

(Optional) Clears the statistics for a specific limit. <what is the limit?>

prefix

(Optional) Displays statistics for a specified prefix.

ipv6-prefix

(Optional) IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

/ prefix-length

(Optional) Length of the IPv6 prefix. A decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). A slash mark must precede the decimal value. The valid values are from 0 to 128.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.2S

This command was introduced.

15.4(1)T

This command was integrated into Cisco IOS Release 15.4(1)T.

Usage Guidelines

The output of the show nat64 statistics command displays the interfaces configured for stateless NAT64 and the packets that were translated or dropped.

Examples

The following is sample output from the show nat64 statistics command:

Device# show nat64 statistics

NAT64 Statistics

Total active translations: 3 (1 static, 2 dynamic; 1 extended)
Sessions found: 518938
Sessions created: 2
Expired translations: 1
Global Stats:
   Packets translated (IPv4 -> IPv6)
      Stateless: 30
      Stateful: 259469
   Packets translated (IPv6 -> IPv4)
      Stateless: 30
      Stateful: 259471

Interface Statistics
   GigabitEthernet0/1/0 (IPv4 configured, IPv6 not configured):
      Packets translated (IPv4 -> IPv6)
         Stateless: 15
         Stateful: 259469
      Packets translated (IPv6 -> IPv4)
         Stateless: 0
         Stateful: 0
      Packets dropped: 0
   GigabitEthernet0/1/3 (IPv4 not configured, IPv6 configured):
      Packets translated (IPv4 -> IPv6)
         Stateless: 0
         Stateful: 0
      Packets translated (IPv6 -> IPv4)
         Stateless: 0
         Stateful: 259471
      Packets dropped: 0
Dynamic Mapping Statistics
   v6v4
      access-list mylist pool mypool refcount 2
         pool mypool:
            start 34.1.1.1 end 34.1.1.1
            total addresses 1, allocated 1 (100%)
            address exhaustion packet count 0
Limit Statistics
   max entry: max allowed 200, used 2, packets exceeded 0

The table below describes the significant fields shown in the display.

Table 44 show nat64 statistics Field Descriptions

Field

Description

Global Stats

Statistics of all the NAT64 interfaces.

Packets translated

Number of packets translated from IPv4 to IPv6 and vice versa.

Packets dropped

Number of packets dropped. The packets that are not translated are dropped.

Related Commands

Command

Description

nat64 enable

Enables stateless NAT64 on an interface.

show nat64 timeouts

To display the Network Address Translation 64 (NAT64) translation session timeout, use the show nat64 timeouts command in user EXEC or privileged EXEC mode.

show nat64 timeouts

Syntax Description

This command has no arguments or keywords.

Command Default

This command has no default settings.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Examples

The following is sample output from the show nat64 timeouts command:

Device# show nat64 timeouts

NAT64 Timeout
   Seconds     CLI Cfg Uses 'All' all flows
   86400       FALSE   FALSE      udp
   300         FALSE   TRUE       tcp
   7200        FALSE   TRUE       tcp-transient
   240         FALSE   FALSE      icmp
   60          FALSE   TRUE      


      

The table below describes the significant fields shown in the display.

Table 45 show nat64 timeouts Field Descriptions

Field

Description

Seconds

NAT64 timeout, in seconds.

CLI Cfg

Indicates whether the timeout is explicitly configured through the CLI. The timeout values configured through the CLI changes the default timeout values.

Related Commands

Command

Description

nat64 translation

Enables NAT64 translation.

show nat64 translations

To display information about Network Address Translation 64 (NAT64) translations, use the show nat64 translations port command in user EXEC or privileged EXEC mode.

show nat64 translations { port number | protocol { icmp | tcp | udp } | v4 { original ipv4-address | translated ipv6-address } | v6 { original ipv6-address | translated ipv4-address } } [ total | verbose ]

Syntax Description

port

Displays information about NAT64 translations filtered by port numbers.

number

Port number. Valid values are from 1 to 65535.

protocol

Displays information about NAT64 translations, filtered by the protocols configured.

icmp

Displays Internet Control Message Protocol (ICMP) entries.

tcp

Displays TCP entries.

udp

Displays UDP entries.

v4

Displays information about NAT64 translations based on an IPv4 address.

original

Displays translations for the original address.

ipv4-address

IPv4 address.

translated

Displays information about translations for the translated IPv4 or IPv6 address.

ipv6-address

IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

v6

Displays information about NAT64 translations based on an IPv6 address.

total

(Optional) Displays the total NAT64 translation count.

verbose

(Optional) Displays detailed NAT64 translation information.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

15.4(2)T

This command was integrated into Cisco IOS Release 15.4(2)T.

Examples

The following is sample output from the show nat64 translations port command:

Device# show nat64 translations port 23

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

tcp    192.0.2.1:23          [3001::c000:201]:23                             
       56.1.1.1:20822        [2001:db8::1]:20822  
                           
Total number of translations: 1
      

The following is sample output from the show nat64 translations v4 original command:

Device# show nat64 translations v4 original 192.0.2.1 

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

tcp    192.0.2.1:23          [3001::c000:201]:23                             
       56.1.1.1:20822        [2001:db8::1]:20822                             
icmp   192.0.2.1:2816        [3001::c000:201]:2816                           
       56.1.1.1:2816         [2001:db8::1]:2816 

Total number of translations: 2
      

The table below describes the significant fields shown in the display.

Table 46 show nat64 translations Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.
Note   

This field displays the IPv4 addresses that were translated into IPv6 addresses and the IPv4 addresses that were translated from IPv6 addresses.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.
Note   

This field displays the IPv6 addresses that were translated into IPv4 addresses and the IPv6 addresses that were translated from IPv4 addresses.

Related Commands

Command

Description

show nat64 translations entry-type

Displays information about NAT64 translations filtered by entry type.

show nat64 translations time

Displays information about NAT64 translations filtered by time.

show nat64 translations total

Displays information about the total NAT64 translation count.

show nat64 translations verbose

Displays detailed NAT64 translation information.

show nat64 translations entry-type

To display information about Network Address Translation 64 (NAT64) translations filtered by entry type, use the show nat64 translations entry-type command in user EXEC or privileged EXEC mode.

show nat64 translations entry-type { bind { all | dynamic | static } | session } [ total | verbose ]

Syntax Description

bind

Displays information about NAT64 translation mapping entries.

all

Displays information about all NAT64 translation mapping entries.

dynamic

Displays information about dynamic mapping entries.

static

Displays information about static mapping entries.

session

Displays information about NAT64 translation session entries.

total

(Optional) Displays information about the total NAT64 translation entry count.

verbose

(Optional) Displays detailed NAT64 translation information.

Command Modes

User EXEC (>)  

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from the show nat64 translations entry-type session command:

Router# show nat64 translations entry-type session

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

---    ---                   ---                                             
       56.1.1.1              2001:db8::1                                     

Total number of translations: 1

      

The table below describes the significant fields shown in the display.

Table 47 show nat64 translations entry-type session Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.
Note   

This field displays the IPv4 addresses that were translated into IPv6 addresses and the IPv4 addresses that were translated from IPv6 addresses.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.
Note   

This field displays the IPv6 addresses that were translated into IPv4 addresses and the IPv6 addresses that were translated from IPv4 addresses.

Related Commands

Command

Description

show nat64 translations

Displays information about NAT64 translations.

show nat64 translations time

Displays information about NAT64 translations filtered by time.

show nat64 translations total

Displays information about the total NAT64 translation count.

show nat64 translations verbose

Displays detailed NAT64 translation information.

show nat64 translations redundancy

To display the Network Address Translation 64 (NAT64) translations filtered by redundancy groups (RGs), use the show nat64 translations redundancy command in user EXEC or privileged EXEC mode.

show nat64 translations redundancy group-id [ total | verbose ]

Syntax Description

group-id

Redundancy group ID. Valid values are from 1 and 2.

total

(Optional) Displays information about the total NAT64 redundancy translations.

verbose

(Optional) Displays detailed NAT64 redundancy translation information.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.7S

This command was introduced.

Usage Guidelines

Use the output of the verify the redundancy groups that you have configured.

Examples

The following is sample output from the show nat64 translations redundancy command:

Device# show nat64 translations redundancy 1

  Proto  Original IPv4         Translated IPv4
        Translated IPv6       Original IPv6 
 ----------------------------------------------------------------------------

        209.165.201.2:21      [2001:DB8:1::103]:32847                                        
 tcp    10.2.1.11:32863       [2001::3201:10b]:32863                          
        10.1.1.1:80           [2001::11]:80                                   
 tcp    209.165.201.2:21      [2001:DB8:1::104]:32848                          
        10.1.1.1:80           [2001::11]:80                    

 Total number of translations: 3

The table below describes the significant fields shown in the display.

Table 48 show nat64 translations redundancy Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.
Note   

This field displays IPv4 addresses that were translated into IPv6 addresses and IPv4 addresses that were translated from IPv6 addresses.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.
Note   

This field displays IPv6 addresses that were translated into IPv4 addresses and IPv6 addresses that were translated from IPv4 addresses.

Related Commands

Command

Description

show nat64 translations

Displays information about NAT64 translations.

show nat64 translations time

To display information about Network Address Translation 64 (NAT64) translations filtered by time, use the show nat64 translations time command in user EXEC or privileged EXEC mode.

show nat64 translations time { created | last-used } { newer-than | older-than } day month year hh:mm:ss [ total | verbose ]

Syntax Description

created

Displays translation entries that were created at the specified time.

last-used

Displays the translation entries that were last used at the specified time.

newer-than

Displays translation entries that are newer than the time stamp.

older-than

Displays translation entries that are older than the time stamp.

day

Day of the month. Valid values are from 1 to 31.

month

Month of the year. Valid values are from January to December.

year

Year. Valid values are from 1993 to 2035.

hh:mm:ss

Time in hh:mm:ss format.

total

(Optional) Displays the total NAT64 translation count.

verbose

(Optional) Displays detailed NAT64 translation information.

Command Modes

User EXEC (>)  

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from the show nat64 translations time created newer-than command:

Router# show nat64 translations time created newer-than 20 June 2011 20:00:00

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------
                                           
       56.1.1.1              2001:db8::1                                     
tcp    192.0.2.1:23          [3001::c000:201]:23                             
       56.1.1.1:20822        [2001:db8::1]:20822                             
icmp   192.0.2.1:2816        [3001::c000:201]:2816                           
       56.1.1.1:2816         [2001:db8::1]:2816                              

Total number of translations: 3

      

The table below describes the significant fields shown in the display.

Table 49 show nat64 translations time created newer-than Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.
Note   

This field displays the IPv4 addresses that were translated into IPv6 addresses and the IPv4 addresses that were translated from IPv6 addresses.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.
Note   

This field displays the IPv6 addresses that were translated into IPv4 addresses and the IPv6 addresses that were translated from IPv4 addresses.

Related Commands

Command

Description

show nat64 translations

Displays information about NAT64 translations.

show nat64 translations entry-type

Displays information about NAT64 translations filtered by entry type.

show nat64 translations total

Displays information about the total NAT64 translation count.

show nat64 translations verbose

Displays the detailed NAT64 translation information.

show nat64 translations total

To display the total Network Address Translation 64 (NAT64) translation count, use the show nat64 translations total command in user EXEC or privileged EXEC mode.

show nat64 translations total [ entry-type { bind { all | dynamic | static } | session } | port number | protocol { icmp | tcp | udp } | time { created | last-used } { newer-than | older-than } day month year hh:mm:ss | v4 { original ipv4-address | translated ipv6-address } | v6 { original ipv6-address | translated ipv4-address } ]

Syntax Description

entry-type

(Optional) Displays information about NAT64 translations filtered by entry type.

bind

(Optional) Displays information about NAT64 translation mapping entries.

all

(Optional) Displays information about all NAT64 translation mapping entries.

dynamic

(Optional) Displays information about dynamic mapping entries.

static

(Optional) Displays information about static mapping entries.

session

(Optional) Displays information about NAT64 translation session entries.

port number

(Optional) Displays information about NAT64 translations filtered by port number. Valid values are from 1 to 65535.

protocol

(Optional) Displays information about NAT64 translations filtered by protocol.

icmp

(Optional) Displays information about Internet Control Message Protocol (ICMP) entries.

tcp

(Optional) Displays information about TCP entries.

udp

(Optional) Displays information about UDP entries.

time

(Optional) Displays information about NAT64 translations filtered by time.

created

(Optional) Displays translation entries created at the specified time.

last-used

(Optional) Displays the translation entries that were last used at the specified time.

newer-than

(Optional) Displays translation entries that are newer than the time stamp.

older-than

(Optional) Displays translation entries that are older than the time stamp.

day

(Optional) Day of the month. Valid values are from 1 to 31.

month

(Optional) Month of the year. Valid values are from January to December.

year

(Optional) Year. Valid values are from 1993 to 2035.

hh:mm:ss

(Optional) Time in hh:mm:ss format.

v4

(Optional) Displays information about NAT64 translations based on an IPv4 address.

original

(Optional) Displays information about translations for the original IPv4 or IPv6 address.

ipv4-address

(Optional) IPv4 address.

translated

(Optional) Displays information about translations for the translated IPv4 or IPv6 address.

ipv6-address

(Optional) IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

v6

(Optional) Displays information about NAT64 translations based on an IPv6 address.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from the show nat64 translations total command:

Router# show nat64 translations total 

Total number of translations: 3

      

The output fields are self-explanatory.

Related Commands

Command

Description

show nat64 translations

Displays information about NAT64 translations.

show nat64 translations entry-type

Displays information about NAT64 translations filtered by entry type.

show nat64 translations time

Displays information about NAT64 translations filtered by time.

show nat64 translations verbose

Displays detailed NAT64 translation information.

show nat64 translations v4

To display Network Address Translation 64 (NAT64) translations based on an IPv4 address, use the show nat64 translations v4 command in user EXEC or privileged EXEC mode.

show nat64 translation v4 { original ipv4-address | translated ipv6-address } total | verbose

Syntax Description

original

Displays translations for the original IPv4 address.

ipv4-address

IPv4-address.

translated

Displays translations for the translated address.

ipv6-address

IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

total

(Optional) Displays the total NAT64 translation count.

verbose

(Optional) Displays detailed NAT64 translation information.

Command Default

This command has no default settings.

Command Modes

User EXEC (>)  

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from theshow nat64 translation v4 original command:

Router# show nat64 translation v4 original 112.1.1.10 

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

tcp    112.1.1.10:23         [3001::7001:10a]:23                             
       56.1.1.2:12656        [2001::2]:12656                                 

Total number of translations: 1
      

The following is sample output from the show nat64 translations v4 translatedcommand:

Router# show nat64 translations v4 translated 3001::7001:10a

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

icmp   112.1.1.10:677        [3001::7001:10a]:677                            
       56.1.1.2:677          [2001::1b01:10a]:677                            

Total number of translations: 1

The table below describes the significant fields shown in the display.

Table 50 show nat64 translations v4 Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.

Related Commands

Command

Description

show nat64 translations entry-type

Displays NAT64 translations filtered by entry type.

show nat64 translations port

Displays NAT64 translations filtered by port numbers.

show nat64 translations protocol

Displays NAT64 translations filtered by protocols.

show nat64 translations time

Displays NAT64 translations filtered by time.

show nat64 translations total

Displays the total NAT64 translation count.

show nat64 translations v6

Displays NAT64 translations based on an IPv6 address.

show nat64 translations verbose

Displays detailed NAT64 translation information.

show nat64 translations v6

To display Network Address Translation 64 (NAT64) translations based on an IPv6 address, use the show nat64 translations v4 command in user EXEC or privileged EXEC mode.

show nat64 translations v6 { original ipv6-address | translated ipv4-address } [ total | verbose ]

Syntax Description

original

Displays translations for the original IPv6 address.

ipv6-address

IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

translated

Displays translations for the translated address.

ipv4-address

IPv4-address.

total

Displays the total NAT64 translation count.

verbose

Displays detailed NAT64 translation information.

Command Default

This command has no default settings.

Command Modes

User EXEC (>)  

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from the show nat64 translation v6 original command:

Router# show nat64 translations v6 original 2001::2

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

---    ---                   ---                                             
       56.1.1.1              2001::2                                         
tcp    112.1.1.10:23         [3001::7001:10a]:23                             
       56.1.1.1:38924        [2001::2]:38924                                 

Total number of translations: 2
      

The following is sample output from the show nat64 translations v6 translated command:

Router# show nat64 translations v6 translated 56.1.1.2

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------

---    ---                   ---                                             
       56.1.1.2              2001::1b01:10a                                  
icmp   112.1.1.10:2370       [3001::7001:10a]:2370                           
       56.1.1.2:2370         [2001::1b01:10a]:2370                           

Total number of translations: 2

The table below describes the significant fields shown in the display.

Table 51 show nat64 translations v6 Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.

Related Commands

Command

Description

nat64 translation

Enables NAT64 translation.

show nat64 translations entry-type

Displays NAT64 translations filtered by entry type.

show nat64 translations port

Displays NAT64 translations filtered by port numbers.

show nat64 translations protocol

Displays NAT64 translations filtered by protocols.

show nat64 translations time

Displays NAT64 translations filtered by time.

show nat64 translation total

Displays the total NAT64 translation count.

show nat64 translations v4

Displays NAT64 translations based on an IPv4 address.

show nat64 translations verbose

Displays detailed NAT64 translation information.

show nat64 translations verbose

To display the detailed Network Address Translation 64 (NAT64) translation information, use the show nat64 translations verbose command in user EXEC or privileged EXEC mode.

show nat64 translations verbose [ entry-type { bind { all | dynamic | static } | session } | port number | protocol { icmp | tcp | udp } | time { created | last-used } { newer-than | older-than } day month year hh:mm:ss | v4 { original ipv4-address | translated ipv6-address } | v6 { original ipv6-address | translated ipv4-address } ]

Syntax Description

entry-type

(Optional) Displays information about NAT64 translations filtered by entry type.

bind

(Optional) Displays information about NAT64 translation mapping entries.

all

(Optional) Displays information about all NAT64 translation mapping entries.

dynamic

(Optional) Displays information about dynamic mapping entries.

static

(Optional) Displays information about static mapping entries.

session

(Optional) Displays information about NAT64 translation session entries.

port number

(Optional) Displays information about NAT64 translations filtered by port number. Valid values are from 1 to 65535.

protocol

(Optional) Displays information about NAT64 translations filtered by protocol.

icmp

(Optional) Displays information about Internet Control Message Protocol (ICMP) entries.

tcp

(Optional) Displays information about TCP entries.

udp

(Optional) Displays information about UDP entries.

time

(Optional) Displays information about NAT64 translations filtered by time.

created

(Optional) Displays translation entries created at the specified time.

last-used

(Optional) Displays the translation entries that were last used at the specified time.

newer-than

(Optional) Displays translation entries that are newer than the time stamp.

older-than

(Optional) Displays translation entries that are older than the time stamp.

day

(Optional) Day of the month. Valid values are from 1 to 31.

month

(Optional) Month of the year. Valid values are from January to December.

year

(Optional) Year. Valid values are from 1993 to 2035.

hh:mm:ss

(Optional) Time in hh:mm:ss format.

v4

(Optional) Displays information about NAT64 translations based on an IPv4 address.

original

(Optional) Displays information about translations for the original IPv4 or IPv6 address.

ipv4-address

(Optional) IPv4 address.

translated

(Optional) Displays information about translations for the translated IPv4 or IPv6 address.

ipv6-address

(Optional) IPv6 network number to include in router advertisements. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

v6

(Optional) Displays information about NAT64 translations based on an IPv6 address.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.4S

This command was introduced.

Examples

The following is sample output from the show nat64 translations verbose command:

Router# show nat64 translations verbose 

Proto  Original IPv4         Translated IPv4
       Translated IPv6       Original IPv6 
----------------------------------------------------------------------------
                                             
       56.1.1.1              2001:db8::1                                     
         created: 01 Jul 2011 15:27:06, last-used:   ---,
           inactivity-time:     ---
         flags: none
         entry-id: 0000000000, use-count: 3
tcp    192.0.2.1:23          [3001::c000:201]:23                             
       56.1.1.1:42485        [2001:db8::1]:42485                             
         created: 01 Jul 2011 15:32:01, last-used:   01 Jul 2011 15:32:04,
           inactivity-time:     00:03:53
         flags: timing-out, syn-in
         entry-id: 0x8ca82cd0, use-count: 1
icmp   192.0.2.1:8552        [3001::c000:201]:8552                           
       56.1.1.1:8552         [2001:db8::1]:8552                              
         created: 01 Jul 2011 15:31:23, last-used:   01 Jul 2011 15:31:23,
           inactivity-time:     00:00:11
         flags: none
         entry-id: 0x8ca82c30, use-count: 1
icmp   192.0.2.1:983         [3001::c000:201]:983                            
       56.1.1.1:983          [2001:db8::1]:983                               
         created: 01 Jul 2011 15:32:06, last-used:   01 Jul 2011 15:32:06,
           inactivity-time:     00:00:54
         flags: none
         entry-id: 0x8ca82d70, use-count: 1

Total number of translations: 4

      

The table below describes the significant fields shown in the display.

Table 52 show nat64 translations verbose Field Descriptions

Field

Description

Proto

Protocol type.

Original IPv4 Translated IPv6

IPv4 address that was translated as an IPv6 address.
Note   

This field displays the IPv4 addresses that were translated into IPv6 addresses and the IPv4 addresses that were translated from IPv6 addresses.

Translated IPv4 Original IPv6

IPv6 address that was translated as an IPv4 address.
Note   

This field displays the IPv6 addresses that were translated into IPv4 addresses and the IPv6 addresses that were translated from IPv4 addresses.

created

The date and time when the entry was created.

last-used

The date and time when the entry was last used.

Related Commands

Command

Description

show nat64 translations

Displays information about NAT64 translations.

show nat64 translations entry-type

Displays NAT64 translations filtered by entry type.

show nat64 translations time

Displays NAT64 translations filtered by time.

show nat64 translations total

Displays the total NAT64 translation count.

show nhrp debug-condition

To display the Next Hop Resolution Protocol (NHRP) conditional debugging information, use the show nhrp debug-conditioncommand in privileged EXEC mode.

show nhrp debug-condition

Syntax Description

This command has no arguments or keywords.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.4(15)T

This command was introduced.

Examples

The following is sample output from the show nhrp debug-condition command:

Router# show nhrp debug-condition
Peer NBMA addresses under debug are:
1.1.1.1, 
Interfaces under debug are:
Tunnel1, Peer Tunnel addresses under debug are:
2.2.2.2, 

The output if self-explanatory. It displays the conditional debugging information for NHRP.

Related Commands

Command

Description

debug nhrp condition

Enables the NHRP conditional debugging.

show nhrp group-map

To display the details of NHRP group mappings, use the show nhrp group-map command in user EXEC or privileged EXEC mode.

show nhrp group-map [ group-name ]

Syntax Description

group-name

(Optional) Name of an NHRP group mapping for which information will be displayed.

Command Default

Information is displayed for all NHRP group mappings.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.4(1)T

This command was introduced.

Cisco IOS XE Release 3.11S

This command was integrated into Cisco IOS XE Release 3.11S.

Usage Guidelines

This command displays the details on NHRP group mappings on the hub along with the list of tunnels using each of the NHRP groups defined in the mappings. In combination with the show ip nhrp command, this command lets you easily determine which QoS policy map is applied to a specific tunnel endpoint.

This command displays the details of the specified NHRP group mapping. The details include the associated QoS policy name and the list of tunnel endpoints using the QoS policy. If no option is specified, it displays the details of all NHRP group mappings.


Note


This command will replace the show ip nhrp group-map command in a future release.

Examples

The following is sample output from the show nhrp group-map command:

Device# show nhrp group-map

Interface: Tunnel0
 NHRP group: spoke_group1
  QoS policy: group1_parent
  Transport endpoints using the qos policy: None

 NHRP group: spoke_group2
  QoS policy: group2_parent
  Transport endpoints using the qos policy: None

 NHRP group: spoke_group3
  QoS policy: group3_parent
  Transport endpoints using the qos policy: None

The following is sample output from the show nhrp group-map command for an NHRP group named test-group-0:

Device# show nhrp group-map test-group-0

Interface: Tunnel0
 NHRP group: tes-group-0
  QoS policy: group3_parent
  Transport endpoints using the qos policy:
  6001::1000:1

The table below describes the significant fields shown in the displays.

Table 53 show nhrp group-map Field Descriptions

Field

Description

Interface

Interface on which the policy is configured.

NHRP group

NHRP group associated with the QoS policy on the interface.

QoS policy

QoS policy configured on the interface.

Transport endpoints using the qos policy

List of transport endpoints using the QoS policy.

Related Commands

Command

Description

ip nhrp map

Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.

nhrp group

Configures an NHRP group on a spoke.

nhrp map group

Adds NHRP groups to QoS policy mappings on a hub.

show dmvpn

Displays DMVPN-specific session information.

show ip nhrp

Displays NHRP mapping information.

show policy-map mgre

Displays statistics about a specific QoS policy as it is applied to a tunnel endpoint.

show platform hardware qfp feature

To display feature-specific information in the Cisco Quantum Flow Processor (QFP), use the show platform hardware qfp featurecommand in privileged EXEC mode.

show platform hardware qfp { active | standby } feature alg { memory | statistics [ protocol | clear [clear] ] }

Syntax Description

active

Displays the active instance of the processor.

standby

Displays the standby instance of the processor.

alg

Displays the Application Level Gateway (ALG) information of the processor.

memory

Displays ALG memory usage information of the processor.

statistics

Displays ALG common statistics information of the processor.

protocol

Protocol name. It can be one of the following values:

  • dns --Displays Domain Name System (DNS) ALG information in the QFP datapath.

  • exec --Displays exec ALG information in the QFP datapath.

  • ftp --Displays FTP ALG information in the QFP datapath.

  • h323 --Displays H.323 ALG information in the QFP datapath.

  • http --Displays HTTP ALG information in the QFP datapath.

  • imap --Displays Internet Message Access Protocol (IMAP) ALG information in the QFP datapath.

  • ldap --Displays Lightweight Directory Access Protocol (LDAP) ALG information in the QFP datapath.

  • login --Displays login ALG information in the QFP datapath.

  • netbios --Displays Network Basic Input Output System (NetBIOS) ALG information in the QFP datapath.

  • pop3 --Displays pop3 ALG information in the QFP datapath.

  • rtsp --Displays Rapid Spanning Tree Protocol (RSTP) ALG information in the QFP datapath.

  • shell --Displays shell ALG information in the QFP datapath.

  • sip --Displays Session Initiation Protocol (SIP) ALG information in the QFP datapath.

  • skinny --Displays skinny ALG information in the QFP datapath.

  • smtp --Displays Simple Mail Transfer Protocol (SMTP) ALG information in the QFP datapath.

  • sunrpc --Displays Sun RPC ALG information in the QFP datapath.

  • tftp --Displays TFTP ALG information in the QFP datapath.

clear

(Optional) Clears ALG common counters after display.

clear

(Optional) Clears the ALG counters.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 2.2

This command was introduced.

Cisco IOS XE Release 3.1S

This command was modified. Support for the NetBIOS protocol was added.

Cisco IOS XE Release 3.2S

This command was modified. The show output was modified to display SIP statistics information.

Usage Guidelines

The show platform hardware qfp feature command when used withthe netbios keyworddisplays the NetBIOS ALG memory usage and statistics information of the processor.

Examples

The following example displays the NetBIOS ALG statistics information of the processor:

Router# show platform hardware qfp active feature alg statistics netbios 
NetBIOS ALG Statistics:
  No. of allocated chunk elements in L7 data pool:0
  No. of times L7 data is allocated:0  No. of times L7 data is freed:0
  Datagram Service statistics
    Total packets            :0
    Direct unique packets    :0
    Direct group packets     :0
    Broadcast packets        :0
    DGM Error packets        :0
    Query request packets    :0
    Positive Qry response packets :0
    Netgative Qry response packets:0
    Unknown packets          :0
    Total error packets      :0
  Name Service statistics
    Total packets            :0
    Query request packets    :0
    Query response packets   :0
    Registration req packets :0
    Registration resp packets:0
    Release request packets  :0
    Release response packets :0
    WACK packets             :0
    Refresh packets          :0
    Unknown packets          :0
    Total error packets      :0
  Session Service statistics
    Total packets            :0
    Message packets          :0
    Request packets          :0
    Positive response packets:0
    Negative response packets:0
    Retarget response packets:0
    Keepalive packets        :0
    Unknown packets          :0
    Total error packets      :0

The table below describes the significant fields shown in the display.


 
		
Table 54 show platform hardware qfp feature Field Descriptions

Field

Description

No. of allocated chunk elements in L7 data pool

Number of memory chunks allocated for processing NetBIOS packets.

No. of times L7 data is allocated:0 No. of times L7 data is freed

Number of times memory is allocated and freed for processing NetBIOS packets.

Direct unique packets

Number of direct unique NetBIOS packets processed.

Direct group packets

Number of direct group NetBIOS packets processed.

Broadcast packets

Number of broadcast NetBIOS packets processed.

DGM Error packets

Number of Datagram Error NetBIOS packets processed.

Query request packets

Number of query request NetBIOS packets processed.

Positive Qry response packets

Number of positive query response NetBIOS packets processed.

Negative Qry response packets

Number of negative query response NetBIOS packets processed.

Unknown packets

Number of unknown packets.

Total error packets

Counter tracking number of error packets.

The following example displays SIP statistics information of the processor. The field descriptions are self-explanatory.

Router# show platform hardware qfp active feature alg statistics sip 
SIP info pool used chunk entries number: 0
RECEIVE
Register: 0 -> 200-OK: 0
Invite: 0 -> 200-OK: 0 Re-invite 0
Update: 0 -> 200-OK: 0
Bye: 0 -> 200-OK: 0
Trying: 0 Ringing: 0 Ack: 0
Info: 0 Cancel: 0 Sess Prog: 0
Message: 0 Notify: 0 Prack: 0
OtherReq: 0 OtherOk: 0 
Events
Null dport: 0 Media Port Zero: 0
Malform Media: 0 No Content Length: 0
Cr Trunk Chnls: 0 Del Trunk Chnls: 0
Cr Normal Chnls: 0 Del Normal Chnls: 0
Media Addr Zero: 0 Need More Data: 0 
Errors
Create Token Err: 0 Add portlist Err: 0
Invalid Offset: 0 Invalid Pktlen: 0
Free Magic: 0 Double Free: 0
Retmem Failed: 0 Malloc Failed: 0
Bad Format: 0 Invalid Proto: 0
Add ALG state Fail: 0 No Call-id: 0
Parse SIP Hdr Fail: 0 Parse SDP Fail: 0
Error New Chnl: 0 Huge Size: 0
Create Failed: 0 
Writeback Errors
Offset Err: 0 PA Err: 0
No Info: 0

Related Commands

Command

Description

debug platform hardware qfp feature

Debugs feature-specific information in the QFP.

show platform hardware qfp feature alg statistics sip

To display Session Initiation Protocol (SIP) application layer gateway (ALG)-specific statistics information in the Cisco Quantum Flow Processor (QFP), use the show platform hardware qfp feature alg statistics sip command in privileged EXEC mode.

show platform hardware qfp feature alg statistics sip [ clear | dbl [ all | clear | entry entry-string [ clear ] ] | dblcfg | l7data { callid call-id | clear } | processor | timer ]

Syntax Description

clear

(Optional) Clears ALG counters after display.

dbl

(Optional) Displays brief information about all SIP blacklist data.

all

(Optional) Displays all dynamic blacklist entries: blacklisted and non blacklisted entries.

entry entry-string

(Optional) Clears the specified blacklist entry.

dblcfg

(Optional) Displays all SIP blacklist settings.

l7data

(Optional) Displays brief information about all SIP Layer 7 data.

callid call-id

(Optional) Displays information about the specified SIP call ID.

processor

(Optional) Displays SIP processor settings.

timer

(Optional) Displays SIP timer settings.

Command Modes

Privileged EXEC (#)

Command History

Release Modification

Cisco IOS XE Release 3.11S

This command was introduced.

Usage Guidelines

This command displays the following error details:
  • Session write lock exceeded
  • Global write lock exceeded
  • Blacklisted
This command also displays the following event details:
  • Blacklist triggered
  • Blacklist timeout

A blacklist is a list of entities that are denied a particular privilege, service, or access.

Examples

The following is sample output from the show platform hardware qfp active feature alg statistics sip command:

Device#  show platform hardware qfp active feature alg statistics sip

Events
...
Cr dbl entry:                10   Del dbl entry:                 10
Cr dbl cfg entry:             8   Del dbl cfg entry:              4
start dbl trig tmr:          10   restart dbl trig tmr:        1014
stop dbl trig tmr:           10   dbl trig timeout:            1014
start dbl blk tmr:            0   restart dbl blk tmr:            0
stop dbl blk tmr:             0   dbl blk tmr timeout:            0
start dbl idle tmr:          10   restart dbl idle tmr:         361
stop dbl idle tmr:            1   dbl idle tmr timeout:           9

DoS Errors
Dbl Retmem Failed:            0    Dbl Malloc Failed:             0
DblCfg Retm Failed:           0    DblCfg Malloc Failed:          0
Session wlock ovflw:          0    Global wlock ovflw:            0
Blacklisted:                  561   

 

The table below describes the significant fields shown in the display.

Table 55 show platform hardware qfp active feature alg statistics sip Field Descriptions

Field

Description

CR dbl entry

Number of dynamic blacklist entries.

start dbl blk tmr

Number of events that have started the dynamic blacklist timer.

stop dbl idle tmr

Number of events that have stopped the dynamic blacklist idle timer.

Del dbl entry

Number of dynamic blacklist entries deleted.

restart dbl trig tmr

Number of dynamic blacklist trigger timers restarted.

dbl trig timeout

Number of dynamic blacklist trigger timers timed out.

restart dbl blk tmr

Number of dynamic blacklist timers to be restarted.

dbl idle tmr timeout

Number of dynamic blacklist idle timers timed out.

DoS Errors

Denial of service (DoS) related errors.

Dbl Retmem Failed

Number of dynamic blacklist return memory failures.

DblCfg Retm Failed

Number of dynamic blacklist configuration return memory failures.

Session wlock ovflw

Number of packets that are dropped because the session-level write lock number is exceeded.

Blacklisted

Number of packets dropped by dynamic blacklisting.

Dbl Malloc Failed

Number of dynamic blacklist memory allocation failures.

DblCfg Malloc Failed

Number of dynamic blacklist configuration memory allocation failures.

Global wlock ovflw

Number of packets dropped because the global-level write-lock number is exceeded.

The following is sample output from the show platform hardware qfp active feature alg statistics sip dbl entry command:

Device# show platform hardware qfp active feature alg statistics sip dbl entry a4a051e0a4a1ebd

req_src_addr: 10.74.30.189             req_dst_addr: 10.74.5.30      
trigger_period:     1000(ms)           block_timeout:       30(sec)
idle_timeout:       60(sec)            dbl_flags: 0x        1
cfg_trig_cnt:        5                 cur_trig_cnt:        0

The table below describes the significant fields shown in the display.

Table 56 show platform hardware qfp active feature alg statistics sip Field Descriptions

Field

Description

req_src_addr

Source IP address of a SIP request message.

trigger_period

Dynamic blacklist trigger period.

idle_timeout

Dynamic blacklist idle timeout entry.

cfg_trig_cnt

Configured trigger counter.

req_dst_addr

Destination IP address of a SIP request message.

block_timeout

Dynamic blacklist block timeout.

dbl_flags

Dynamic blacklist entry flags.

cur_trig_cnt

Current trigger counter.

Related Commands

alg sip blacklist

Configures a dynamic SIP ALG blacklist for destinations.

alg sip processor

Configures the maximum number of backlog messages that wait for shared resources.

alg sip timer

Configures a timer that SIP ALG uses to manage SIP calls.

show platform software trace message

To display trace messages for a module, enter the show platform software trace message command in privileged EXEC mode or diagnostic mode.

show platform software trace message process hardware-module slot

Syntax Description

process

The process in which the tracing level is being set. The following keywords are available:

  • chassis-manager --The Chassis Manager process.

  • cpp-control-process --The Cisco packet processor (CPP) Control process.

  • cpp-driver --The CPP driver process.

  • cpp-ha-server --The CPP high availability (HA) server process.

  • cpp-service-process --The CPP service process.

  • forwarding-manager --The Forwarding Manager process.

  • host-manager --The Host Manager process.

  • interface-manager --The Interface Manager process.

  • ios --The Cisco IOS process.

  • logger --The logging manager process.

  • pluggable-services --The pluggable services process.

  • shell-manager --The Shell Manager process.

hardware-module

Tthe hardware module where the process whose trace level is being set is running. The following keywords are available:

  • carrier-card --The process is on an SPA Interface Processor (SIP).

  • forwarding-processor --The process is on an embedded services processor (ESP).

  • route-processor --The process is on an route processor (RP).

slot

The slot of the hardware module. Options are as follows:

  • number --The number of the SIP slot of the hardware module where the trace level is being set. For instance, if you want to specify the SIP in SIP slot 2 of the router, enter 2.

  • SIP-slot / SPA-bay --The number of the SIP router slot and the number of the shared port adapter (SPA) bay of that SIP. For instance, if you want to specify the SPA in bay 2 of the SIP in router slot 3, enter 3/2.

  • cpp active --The CPP in the active ESP.

  • cpp standby --The CPP in the standby ESP.

  • f0 --The ESP in ESP slot 0.

  • f1 --The ESP in ESP slot 1

  • fp active --The active ESP.

  • fp standby --The standby ESP.

  • r0 --The RP in RP slot 0.

  • r1 --The RP in RP slot 1.

  • rp active --The active RP.

  • rp standby --The standby RP.

  • qfp active --The active Quantum Flow Processor (QFP)

Command Modes

Privileged EXEC (#) Diagnostic (diag)

Command History

Release

Modification

Cisco IOS XE Release 2.1

This command was introduced.

12.2(33)XND

This command was modified. The command output displays the truncated traceback message also.

Cisco IOS XE Release XE 3.1S

The qfp active keywords were added.

Usage Guidelines

The show platform software trace message command is used to display trace messages from an in-memory message ring of a module’s process that keeps a condensed historical record of all messages. Although all messages are saved in a trace log file unmodified, only the first 128 bytes of a message are saved in the message ring. The size limitation does not apply to the traceback portion of a message.

Examples

The following example shows how to display the trace messages for the Host Manager process in RP slot 0 using the show platform software trace message command:

Router# show platform software trace message host-manager R0
08/23 12:09:14.408 [uipeer]: (info): Looking for a ui_req msg
08/23 12:09:14.408 [uipeer]: (info): Start of request handling for con 0x100a61c8
08/23 12:09:14.399 [uipeer]: (info): Accepted connection for 14 as 0x100a61c8
08/23 12:09:14.399 [uipeer]: (info): Received new connection 0x100a61c8 on descriptor 14
08/23 12:09:14.398 [uipeer]: (info): Accepting command connection on listen fd 7
08/23 11:53:57.440 [uipeer]: (info): Going to send a status update to the shell manager in slot 0
08/23 11:53:47.417 [uipeer]: (info): Going to send a status update to the shell manager in slot 0

The following example shows a truncated message that has a traceback. The truncated portion of the message is indicated by an ellipsis (...):

03/02 15:47:44.002 [errmsg]: (ERR): %EVENTLIB-3-TIMEHOG: read asyncon 0x100a9260: 60618ms, Traceback=1#862f8780825f93a618ecd9 ...Traceback=1#862f8780825f93a618ecd9dd48b3be96 evlib:FCAF000+CC00 evlib:FCAF000+A6A8 evutil:FFCA000+ADD0 evutil:FFCA000+5A80 evutil:FFCA000+A68C uipeer:FF49000+10AFC evlib:FCAF000+D28C evlib:FCAF000+F4C4 :10000000+1B24C c:EF44000+1D078 c:EF44000+1D220

Related Commands

Command

Description

set platform software trace

Sets the trace level for a specific module.

show platform software trace levels

Displays trace levels for a module.

show redundancy application control-interface group

To display control interface information for a redundancy group, use the show redundancy application control-interface group command in privileged EXEC mode.

show redundancy application control-interface group [group-id]

Syntax Description

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application control-interfacecommand shows information for the redundancy group control interfaces.

Examples

The following is sample output from the show redundancy application control-interface command:

Router# show redundancy application control-interface group 2
The control interface for rg[2] is GigabitEthernet0/1/0
Interface is Control interface associated with the following protocols: 2 1 
BFD Enabled
Interface Neighbors: 

Related Commands

Command

Description

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application group

Displays redundancy group information.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application protocol

Displays protocol-specific information for a redundancy group.

show redundancy application data-interface

To display data interface-specific information, use the show redundancy application data-interfacecommand in privileged EXEC mode.

show redundancy application data-interface group [group-id]

Syntax Description

group

Specifies the redundancy group.

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application data-interface command displays information about the redundancy group data interfaces.

Examples

The following is sample output from the show redundancy application data-interface command:

Router# show redundancy application data-interface group 1 
The data interface for rg[1] is GigabitEthernet0/1/1

Related Commands

Command

Description

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application group

Displays redundancy group information.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application protocol

Displays protocol-specific information for a redundancy group.

show redundancy application faults group

To display fault-specific information for a redundancy group, use the show redundancy application faults groupcommand in privileged EXEC mode.

show redundancy application faults group [group-id]

Syntax Description

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application faultscommand shows information returned by redundancy group faults.

Examples

The following is sample output from the show redundancy application faults command:

Router# show redundancy application faults group 2
Faults states Group 2 info: 
        Runtime priority: [150]
                RG Faults RG State: Up. 
                        Total # of switchovers due to faults:           2
                        Total # of down/up state changes due to faults: 2 

Related Commands

Command

Description

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application group

Displays redundancy group information.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application protocol

Displays protocol-specific information for a redundancy group.

show redundancy application group

To display the redundancy group information, use the show redundancy application group command in privileged EXEC mode.

show redundancy application group [ group-id | all ]

Syntax Description

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

all

(Optional) Display information about all redundancy groups.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

15.3(2)T

This command was integrated into Cisco IOS Release 15.3(2)T.

Usage Guidelines

Use the show redundancy application group command to display the current state of each interbox redundancy group on the device and the peer device.

Examples

The following is sample output from the show redundancy application group all command:

Device# show redundancy application group all
 
Faults states Group 1 info: 
        Runtime priority: [200]
                RG Faults RG State: Up. 
                        Total # of switchovers due to faults:           3
                        Total # of down/up state changes due to faults: 2
Group ID:1
Group Name:grp2
Administrative State: No Shutdown
Aggregate operational state : Up
My Role: ACTIVE
Peer Role: UNKNOWN
Peer Presence: No
Peer Comm: No
Peer Progression Started: No
RF Domain: btob-one
         RF state: ACTIVE
         Peer RF state: DISABLED
RG Protocol RG 1
------------------
        Role: Active
        Negotiation: Enabled
        Priority: 200
        Protocol state: Active
        Ctrl Intf(s) state: Down
        Active Peer: Local
        Standby Peer: Not exist
        Log counters:
                role change to active: 2
                role change to standby: 0
                disable events: rg down state 1, rg shut 0
                ctrl intf events: up 0, down 2, admin_down 1
                reload events: local request 3, peer request 0
RG Media Context for RG 1
--------------------------
        Ctx State: Active
        Protocol ID: 1
        Media type: Default
        Control Interface: GigabitEthernet0/1/0
        Hello timer: 5000
        Effective Hello timer: 5000, Effective Hold timer: 15000
         LAPT values: 0, 0
        Stats:
                Pkts 0, Bytes 0, HA Seq 0, Seq Number 0, Pkt Loss 0
                Authentication not configured
                Authentication Failure: 0
                Reload Peer: TX 0, RX 0
                Resign: TX 1, RX 0
        Standby Peer: Not Present. 
Faults states Group 2 info: 
        Runtime priority: [150]
                RG Faults RG State: Up. 
                        Total # of switchovers due to faults:           2
                        Total # of down/up state changes due to faults: 2
Group ID:2
Group Name:name1
Administrative State: No Shutdown
Aggregate operational state : Up
My Role: ACTIVE
Peer Role: UNKNOWN
Peer Presence: No
Peer Comm: No
Peer Progression Started: No
RF Domain: btob-two
         RF state: ACTIVE
         Peer RF state: DISABLED
RG Protocol RG 2
------------------
        Role: Active
        Negotiation: Enabled
        Priority: 150
        Protocol state: Active
        Ctrl Intf(s) state: Down
        Active Peer: Local
        Standby Peer: Not exist
        Log counters:
                role change to active: 1
                role change to standby: 0
                disable events: rg down state 1, rg shut 0
                ctrl intf events: up 0, down 2, admin_down 1
                reload events: local request 2, peer request 0
RG Media Context for RG 2
--------------------------
        Ctx State: Active
        Protocol ID: 2
        Media type: Default
        Control Interface: GigabitEthernet0/1/0
        Hello timer: 5000
        Effective Hello timer: 5000, Effective Hold timer: 15000
         LAPT values: 0, 0
        Stats:
                Pkts 0, Bytes 0, HA Seq 0, Seq Number 0, Pkt Loss 0
                Authentication not configured
                Authentication Failure: 0
                Reload Peer: TX 0, RX 0
                Resign: TX 0, RX 0
        Standby Peer: Not Present. 

The table below describes the significant fields shown in the display.

Table 57 show redundancy application group all Field Descriptions

Field

Description

Faults states Group 1 info

Redundancy group faults information for Group 1.

Runtime priority

Current priority of the redundancy group.

RG Faults RG State

Redundancy group state returned by redundancy group faults.

Total # of switchovers due to faults

Number of switchovers triggered by redundancy group fault events.

Total # of down/up state changes due to faults

Number of down and up state changes triggered by redundancy group fault events.

Group ID

Redundancy group ID.

Group Name

Redundancy group name.

Administrative State

Redundancy group state configured by users.

Aggregate operational state

Current redundancy group state.

My Role

Current role of the device.

Peer Role

Current role of the peer device.

Peer Presence

Indicates if the peer device is detected or not.

Peer Comm

Indicates the communication state with the peer device.

Peer Progression Started

Indicates if the peer device has started Redundancy Framework (RF) progression.

RF Domain

Name of the RF domain for the redundancy group.

Related Commands

Command

Description

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application protocol

Displays protocol-specific information for a redundancy group.

show redundancy application if-mgr

To display interface manager information for a redundancy group, use the show redundancy application if-mgr command in privileged EXEC mode.

show redundancy application if-mgr group [group-id]

Syntax Description

group

Specifies the redundancy group.

group-id

(Optional) Redundancy group ID. Valid values are 1 to 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application if-mgr command shows information of traffic interfaces protected by redundancy groups. When a traffic interface is functioning with the redundancy group, the state is no shut on the active device, and shut on the standby device. On the other hand, it is always shut on the standby device.

Examples

The following is sample output from the show redundancy application if-mgr command:

Router# show redundancy application if-mgr group 2 
RG ID: 2
 Interface       VIP         VMAC        Shut   Decrement
 ==========================================================
 GigabitEthernet0/1/7 10.1.1.3 0007.b422.0016  no shut    50
 GigabitEthernet0/3/1 11.1.1.3 0007.b422.0017  no shut    50 

The table below describes the significant fields shown in the display.

Table 58 show redundancy application if-mgr Field Descriptions

Field

Description

RG ID

Redundancy group ID.

Interface

Interface name.

VIP

Virtual IP address for this traffic interface.

VMAC

Virtual MAC address for this traffic interface.

Shut

The state of this interface.

Note   

It is always “shut” on the standby box.

Decrement

The decrement value for this interface. When this interface goes down, the runtime priority of its redundancy group decreases.

Related Commands

Command

Description

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application group

Displays redundancy group information.

show redundancy application protocol

Displays protocol-specific information for a redundancy group

show redundancy application protocol

To display protocol-specific information for a redundancy group, use the show redundancy application protocolcommand in privileged EXEC mode.

(explicit id )

show redundancy application protocol { protocol-id | group [group-id] }

Syntax Description

protocol-id

Protocol ID. The range is from 1 to 8.

group

Specifies the redundancy group.

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application protocolcommand shows information returned by redundancy group protocol.

Examples

The following is sample output from the show redundancy application protocol command:

Router# show redundancy application protocol 3
 
Protocol id: 3, name: 
 BFD: ENABLE
 Hello timer in msecs: 0
 Hold timer in msecs: 0 

The table below describes the significant fields shown in the display.

Table 59 show redundancy application protocol Field Descriptions

Field

Description

Protocol id

Redundancy group protocol ID.

BFD

Indicates whether the BFD protocol is enabled for the redundancy group protocol.

Hello timer in msecs

Redundancy group hello timer, in milliseconds, for the redundancy group protocol. The default is 3000 msecs.

Hold timer in msecs

Redundancy group hold timer, in milliseconds, for the redundancy group protocol. The default is 10000 msecs.

Related Commands

Command

Description

show redundancy application group

Displays redundancy group information.

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application transport

To display transport-specific information for a redundancy group, use the show redundancy application transportcommand in privileged EXEC mode.

show redundancy application transport { client | group [group-id] }

Syntax Description

client

Displays transport client-specific information.

group

Displays the redundancy group name.

group-id

(Optional) Redundancy group ID. Valid values are 1 and 2.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The show redundancy application transport command shows information for redundancy group transport.

Examples

The following is sample output from the show redundancy application transport group command:

Router# show redundancy application transport group 1
Transport Information for RG (1) 

Related Commands

Command

Description

show redundancy application control-interface

Displays control interface information for a redundancy group.

show redundancy application faults

Displays fault-specific information for a redundancy group.

show redundancy application group

Displays redundancy group information.

show redundancy application if-mgr

Displays if-mgr information for a redundancy group.

show redundancy application protocol

Displays protocol-specific information for a redundancy group.

show running-config mdns-sd policy

To display current running multicast Domain Name System (mDNS) service-policy configuration details for the device or interface, use the show running-config mdns-sd policy command in privileged EXEC mode.

show running-config mdns-sd policy { global | interface type number}

Syntax Description

global

Displays current running mDNS service-policy configuration details for the device.

interface type number

Displays current running mDNS service-policy configuration details for the specified interface.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Usage Guidelines

To view current running mDNS service-policy configuration details for the device, use the show running-config mdns-sd policy global command form.

To view current running mDNS service-policy configuration details for a specific interface, use the show running-config mdns-sd policy interface type number command form

Examples

The following is sample output for the show running-config mdns-sd policy command.

The current running configuration details for the device is displayed below. The output signifies that the mDNS gateway functionality is enabled on the device, and the designated gateway status is enabled without a Time to Live (TTL) value.

Device> enable
Device# show running-config mdns-sd policy global


service-routing mdns-sd
  designated-gateway enable
  service-type-enumeration period 16


 

The current running configuration details for the interface is displayed below. The output given below signifies that the mDNS gateway functionality is enabled on the interface, and the designated gateway status is enabled with a TTL value of 20 minutes.

Examples

Current running configuration details for a device interface

The output given below signifies that the mDNS gateway functionality is enabled on the interface, and the designated gateway status is enabled with a TTL value of 20 minutes.

Device> enable
Device# show running-config mdns-sd policy interface ethernet 0/1


service-routing mdns-sd
  designated-gateway enable ttl 20


 

Related Commands

Command

Description

show running-config mdns-sd service-instance

Displays current running mDNS service-instance configuration details.

show running-config mdns-sd service-list

Displays current running mDNS service-list configuration details.

show running-config mdns-sd service-instance

To display current running multicast Domain Name System (mDNS) service-instance configuration details, use the show running-config mdns-sd service-instance command in privileged EXEC mode.

show running-config mdns-sd service-instance { all | name service-instance-name regtype service-type domain name}

Syntax Description

all

Displays all current running mDNS service-instance configuration details.

name service-instance-name

Displays current running mDNS service-instance configuration details for the specified service instance.

regtype service-type

Specifies that the service instance is of the specified service type.

domain name

Specifies the domain with which the service-instance is being associated.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Usage Guidelines

To view current running mDNS service-instance configuration details for all services, use the show running-config mdns-sd service-instance all command form.

To view current running mDNS service-policy configuration details for a specific service-instance, use the show running-config mdns-sd service-instance name service-instance-name command form. To view specific service-instance configuration details, you need to specify the service type and domain name too.

Examples

The following is a sample output for the show running-config mdns-sd service-instance command.

The current running mDNS service-instance configuration information for all services is displayed below. The service instance names, the service type and the domain names are displayed in the output.

Device> enable
Device# show running-config mdns-sd service-instance all


service-instance mdns-sd service serv2 regtype _tcp._123 domain tcp
 port 55
service-instance mdns-sd service serv1 regtype _tcp._12 domain tcp


 

Examples

Current running mDNS service-instance configuration information for a service instance.
Device> enable
Device# show running-config mdns-sd service-instance name serv1 regtype _tcp._12 domain tcp


service-instance mdns-sd service serv1 regtype _tcp._12 domain tcp


 

Related Commands

Command

Description

show running-config mdns-sd policy

Displays current running mDNS service-policy configuration details for the device or interface.

show running-config mdns-sd service-list

Displays current running mDNS service-list configuration details.

show running-config mdns-sd service-list

To display current running multicast Domain Name System (mDNS) service-list configuration details, use the show running-config mdns-sd service-list command in privileged EXEC mode.

show running-config mdns-sd service-list { all | name service-list-name [ sequence-number sequence-number] | query}

Syntax Description

all

Displays all current running mDNS service-list configuration details. The details include the service-list name, sequence number, the option that is applied, and associated match statements, if any.

name service-list-name

Displays current running mDNS service-list configuration details for the specified service list.

sequence-number sequence-number

(Optional) Specifies that the service-list configuration details must be displayed for the specified sequence number.

Note    You must specify the sequence number since more than one sequence number can be associated with the same service-list.

query

Displays current running mDNS service-list query details.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Usage Guidelines

To view current running mDNS service-list configuration details for all service-lists, use the show running-config mdns-sd service-list all command form.

To view current running mDNS service-list configuration details for a specific service-list, use the show running-config mdns-sd service-list name service-list-name [sequence-number sequence-number] command form. The keyword-argument pair sequence-number sequence-number enables you to view the match statements associated with the service-list. The match statements are associated with service-lists for filtering types of service, types of service instances and associated queries, and types of messages such as announcements and queries.

To view queries that are associated with various service-lists, use the show running-config mdns-sd service-list query command form.

Examples

The following is a sample output for the show running-config mdns-sd service-list command.

The current running mDNS service-list configuration information is displayed below. The service list names, match statements, and the permit or deny option details are displayed in the output.

Device> enable
Device# show running-config mdns-sd service-list all


service-list mdns-sd sl1 permit 2
service-list mdns-sd sl3 deny 10
 match message-type announcement
 match service-type _ipp._tcp
service-list mdns-sd srvc-lst permit 6


 

Examples

Current running mDNS service-list configuration for an active query.
Device> enable
Device# show running-config mdns-sd service-list query


service-list mdns-sd sl2 query
service-list mdns-sd sl-qry query
 service-type ser-type
 service-type _tcp._dom1
service-list mdns-sd sd2 query


 

Related Commands

Command

Description

show running-config mdns-sd policy

Displays current running mDNS service-policy configuration details for the device or interface.

show running-config mdns-sd service-instance

Displays current running mDNS service-instance configuration details.

show running-config vrf

To display the subset of the running configuration of a router that is linked to a specific VPN routing and forwarding (VRF) instance or linked to all VRFs configured on the router, use the show running-config vrf command in privileged EXEC mode.

show running-config vrf [vrf-name]

Syntax Description

vrf-name

(Optional) Name of the VRF configuration that you want to display.

Command Default

If you do not specify the name of a VRF configuration, the running configurations of all VRFs on the router are displayed.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(28)SB

This command was introduced.

12.2(33)SRB

This command was integrated into Cisco IOS Release 12.2(33)SRB.

12.2(33)SXH

This command was integrated into Cisco IOS Release 12.2(33)SXH.

12.4(20)T

This command was integrated into Cisco IOS Release 12.4(20)T.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

Cisco IOS XE Release 3.5S

This command was modified. The output of the command was modified to display the Network Address Translation (NAT) configuration.

Usage Guidelines

Use the show running-config vrf command to display a specific VRF configuration or to display all VRF configurations on the router. To display the configuration of a specific VRF, specify the name of the VRF.

This command displays the following elements of the VRF configuration:

  • The VRF submode configuration.

  • The routing protocol and static routing configurations associated with the VRF.

  • The configuration of interfaces in the VRF, which includes the configuration of any owning controller and physical interface for a subinterface.

Examples

The following is sample output from the show running-config vrf command. It includes a base VRF configuration for VRF vpn3 and Border Gateway Protocol (BGP) and Open Shortest Path First (OSPF) configurations associated with VRF vpn3.

Router# show running-config vrf vpn3

Building configuration...

Current configuration : 720 bytes
ip vrf vpn3
 rd 100:1
 route-target export 100:1
 route-target import 100:1
!
!
interface GigabitEthernet0/0/1
 description connected to nat44-1ru-ce1 g0/0/0
 ip vrf forwarding vpn3
 ip address 172.17.0.1 255.0.0.0
 ip nat inside
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/3
 no ip address
 negotiation auto
!
interface GigabitEthernet0/0/3.2
 encapsulation dot1Q 2
 ip vrf forwarding vpn3
 ip address 10.0.0.1 255.255.255.0
 ip nat inside
!
router bgp 100
 !
 address-family ipv4 vrf vpn3
  redistribute connected
  redistribute static
 exit-address-family
ip nat inside source route-map rm-vpn3 pool shared-pool vrf vpn3 match-in-vrf overload
ip nat pool shared-pool 10.0.0.2 10.0.0.254 prefix-length 24
!
router ospf 101 vrf vpn3
 log-adjacency-changes
 area 1 sham-link 10.43.43.43 10.23.23.23 cost 10
 network 172.17.0.0 0.255.255.255 area 1
.
.
.
end

The table below describes the significant fields shown in the display.

Table 60 show running-config vrf Field Descriptions

Field

Description

Current configuration: 720 bytes

Indicates the number of bytes (720) in the VRF vpn3 configuration.

ip vrf vpn3

Indicates the name of the VRF (vpn3) for which the configuration is displayed.

rd 100:1

Identifies the route distinguisher (100:1) for VRF vpn3.

route-target export 100:1

route-target import 100:1

Specifies the route-target extended community for VRF vpn3.

  • Routes tagged with route-target export 100:1 are exported from VRF vpn3.

  • Routes tagged with the route-target import 100:1 are imported into VRF vpn3.

interface GigabitEthernet0/0/1

Specifies the interface associated with VRF vpn3.

ip vrf forwarding vpn3

Associates VRF vpn3 with the named interface.

ip address 172.17.0.1 255.0.0.0

Configures the IP address of the Gigabit Ethernet interface.

ip nat inside

Enables NAT of inside addresses.

router bgp 100

Sets up a BGP routing process for the router with the autonomous system number as 100.

address-family ipv4 vrf vpn3

Sets up a routing session for VRF vpn3 using the standard IPv4 address prefixes.

redistribute connected

Redistributes routes that are automatically established by the IP on an interface into the BGP routing domain.

ip nat pool

Defines a pool of IP addresses for NAT.

router ospf 101 vrf vpn3

Sets up an OSPF routing process and associates VRF vpn3 with OSPF VRF processes.

area 1 sham-link 10.43.43.43 10.23.23.23 cost 10

Configures a sham-link interface on a provider edge (PE) router in a Multiprotocol Label Switching (MPLS) VPN backbone.

  • 1 is the ID number of the OSPF area assigned to the sham-link.

  • 10.43.43.43 is the IP address of the source PE router.

  • 10.23.23.23 is the IP address of the destination PE router.

  • 10 is the OSPF cost to send IP packets over the sham-link interface.

network 172.17.0.0 0.255.255.255 area 1

Defines the interfaces on which OSPF runs and defines the area ID for those interfaces.

Related Commands

Command

Description

ip vrf

Configures a VRF routing table.

show ip interface

Displays the usability status of interfaces configured for IP.

show ip vrf

Displays the set of defined VRFs and associated interfaces.

show running-config interface

Displays the configuration for a specific interface.

sip address

To configure a Session Initiation Protocol (SIP) server IPv6 address to be returned in the SIP server’s IPv6 address list option to clients, use the sip addresscommand in DHCP for IPv6 pool configuration mode. To disable this feature, use the no form of this command.

sip address ipv6-address

no sip address ipv6-address

Syntax Description

ipv6-address

An IPv6 address. The ipv6-address argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

Command Default

No default behavior or values

Command Modes


DHCP for IPv6 pool configuration

Command History

Release

Modification

12.3(14)T

This command was introduced.

12.2(18)SXE

This command was integrated into Cisco IOS Release 12.2(18)SXE.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

Cisco IOS XE Release 2.5

This command was updated. It was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

For the Dynamic Host Configuration Protocol (DHCP) for IPv6 server to obtain prefixes from RADIUS servers, the user must also configure the authorization, authentication, and accounting (AAA) client and PPP on the router. For information on how to configure the AAA client and PPP, see the "Implementing ADSL and Deploying Dial Access for IPv6" module.

The sip address command configures a SIP server IPv6 address to be returned in the SIP server’s IPv6 address list option to clients. To configure multiple SIP server addresses, issue this command multiple times. The new addresses will not overwrite old ones.

Examples

In the following example, the SIP server IPv6 address 2001:0db8::2 is configured to be returned in the SIP server’s IPv6 address list option to clients:

sip address 2001:0DB8::2

Related Commands

Command

Description

prefix-delegation aaa

Specifies that prefixes are to be acquired from AAA servers.

sip domain-name

Configures an SIP server domain name to be returned in the SIP server’s domain name list option to clients.

sip domain-name

To configure a Session Initiation Protocol (SIP) server domain name to be returned in the SIP server’s domain name list option to clients, use the sip domain-namecommand in DHCP for IPv6 pool configuration mode. To disable this feature, use the no form of this command.

sip domain-name domain-name

no sip domain-name domain-name

Syntax Description

domain-name

A domain name for a DHCP for IPv6 client.

Command Default

No default behavior or values.

Command Modes


DHCP for IPv6 pool configuration

Command History

Release

Modification

12.3(14)T

This command was introduced.

12.2(18)SXE

This command was integrated into Cisco IOS Release 12.2(18)SXE.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

Cisco IOS XE Release 2.5

This command was updated. It was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

In order for the Dynamic Host Configuration Protocol (DHCP) for IPv6 server to obtain prefixes from RADIUS servers, the user must also configure the authorization, authentication, and accounting (AAA) client and PPP on the router. For information on how to configure the AAA client and PPP, see the "Implementing ADSL and Deploying Dial Access for IPv6" module.

The sip domain-name command configures a SIP server domain name to be returned in the SIP server’s domain name list option to clients. To configure multiple SIP server domain names, issue this command multiple times. The new domain names will not overwrite old ones.

Examples

The following example configures the SIP server domain name sip1.cisco.com to be returned in the SIP server’s domain name list option to clients:

sip domain-name sip1.cisco.com

Related Commands

Command

Description

prefix-delegation aaa

Specifies that prefixes are to be acquired from AAA servers.

sip address

Configures a SIP server IPv6 address to be returned in the SIP server’s IPv6 address list option to clients.

snmp-server enable traps dhcp

To enable DHCP Simple Network Management Protocol (SNMP) trap notifications, use the snmp-server enable traps dhcp command in global configuration mode. To disable DHCP trap notifications, use the no form of this command.

snmp-server enable traps dhcp [duplicate] [interface] [pool] [subnet] [time]

no snmp-server enable traps dhcp [duplicate] [interface] [pool] [subnet] [time]

Syntax Description

duplicate

(Optional) Sends notification about duplicate IP addresses.

interface

(Optional) Sends notification that a per interface lease limit is exceeded.

pool

(Optional) Sends notification when address utilization for an address pool has risen above or fallen below a configurable threshold.

subnet

(Optional) Sends notification when address utilization for a subnet has risen above or fallen below a configurable threshold.

time

(Optional) Sends notification that the DHCP server has started or stopped.

Command Default

DHCP trap notifications are not sent.

Command Modes

Global configuration (config)

Command History

Release

Modification

12.2(33)SRC

This command was introduced.

Usage Guidelines

If you do not specify any of the optional keywords, all DHCP trap notifications are enabled.

Examples

The following example shows how to send SNMP trap notifications to the SNMP manager when the secondary subnet utilization falls below or exceeds the configured threshold:

Router(config)# ip dhcp pool pool2 
Router(dhcp-config)# utilization mark high 80 log 
Router(dhcp-config)# utilization mark low 70 log 
Router(dhcp-config)# network 192.0.2.0 255.255.255.0 
Router(dhcp-config)# network 192.0.4.0 255.255.255.252 secondary 
Router(config-dhcp-subnet-secondary)# override utilization high 40 
Router(config-dhcp-subnet-secondary)# override utilization low 30
!
Router(config)# snmp-server enable traps dhcp subnet

In the following example, all DHCP trap notifications will be sent to the SNMP manager in response to DHCP server events:

Router(config)# snmp-server enable traps dhcp 

source-interface (mDNS)

To specify an alternate source interface for outgoing multicast Domain Name System (mDNS) packets on a device, use the source-interface command in mDNS configuration mode. To disable the alternate source interface for outgoing mDNS packets on a device, use the no form of this command.

source-interface type number

no source-interface type number

Syntax Description

type

Interface type. Specify the interface that you want to configure as the alternate source interface for outgoing mDNS packets on the device. For more information, use the question mark (?) online help function.

number

Interface number. For more information about the numbering syntax for your networking device, use the question mark (?) online help function.

Command Default

An alternate source interface for outgoing mDNS packets is not configured on a device.

Command Modes

Multicast DNS configuration (config-mdns)

Command History

Release

Modification

15.2(2)E

This command was introduced.

Cisco IOS XE 3.6E

This command was integrated into the Cisco IOS XE 3.6E release.

Usage Guidelines

Some devices have interfaces for which no IP address is assigned. If you configure the source-interface command on such a device, then the IP address of the source-interface is used when outgoing mDNS service information is transported through the interface with no IP address.


Note


Before configuring the alternate mDNS source interface for a device, ensure that the source interface has a valid IP address assigned to it.


Examples

The following example shows you how to specify an interface as an alternate source interface for outgoing mDNS packets on a device:

Device> enable
Device# configure terminal
Device(config)# service-routing mdns-sd
Device(config-mdns)# source-interface ethernet 0/1
Device(config-mdns)# exit

 

Related Commands

Command

Description

service-routing mdns-sd

Enables mDNS gateway functionality for a device.

show mdns statistics

Displays mDNS statistics for the specified service-list.

show running-config mdns-sd policy

Displays current running mDNS service-policy configuration details for the device or interface.

subnet prefix-length

To configure a subnet allocation pool and determine the size of subnets that are allocated from the pool, use the subnet prefix-length command in DHCP pool configuration mode. To unconfigure subnet pool allocation, use the no form of this command.

subnet prefix-length prefix-length

no subnet prefix-length prefix-length

Syntax Description

prefix-length

Configures the IP subnet prefix length in classless interdomain routing (CIDR) bit count notation. The range is from 1 to 31.

Command Default

No default behavior or values.

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.2(15)T

This command was introduced.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

Usage Guidelines

This command is used to configure a Cisco IOS router as a subnet allocation server for a centralized or remote Virtual Private Network (VPN) on-demand address pool (ODAP) manager. This command is configured under a DHCP pool. The prefix-length argument is used to determine the size of the subnets that are allocated from the subnet allocation pool. The values that can be configured for the prefix-length argument follow CIDR bit count notation format.

Configuring Global Subnet Pools

Global subnet pools are created in a centralized network. The ODAP server allocates subnets from the subnet allocation server based on subnet availability. When the ODAP manager allocates a subnet, the subnet allocation server creates a subnet binding. This binding is stored in the DHCP database for as long as the ODAP server requires the address space. The binding is destroyed and the subnet is returned to the subnet pool only when the ODAP server releases the subnet as address space utilization decreases.

Configuring VPN Subnet Pools

A subnet allocation server can be configured to assign subnets from VPN subnet allocation pools for Multiprotocol Label Switching (MPLS) VPN clients. VPN routes between the ODAP manager and the subnet allocation server are configured based on VRF name or VPN ID configuration. The VRF and VPN ID are configured to maintain routing information that defines customer VPN sites. This customer site is attached to a provider edge (PE) router. A VRF consists of an IP routing table, a derived Cisco Express Forwarding (CEF) table, a set of interfaces that use the forwarding table, and a set of rules and routing protocol parameters that control the information that is included in the routing table.

Configuring VPN Subnet Pools for VPN clients with VPN IDs

A subnet allocation server can also be configured to assign subnets from VPN subnet allocation pools based on the VPN ID of a client. The VPN ID (or Organizational Unique Identifier [OUI]) is a unique identifier assigned by the IEEE. VPN routes between the ODAP manager and the subnet allocation server are enabled by configuring the DHCP pool with a VPN ID that matches the VPN ID that is configured for the VPN client.

Examples

Examples

The following example configures a router to be a subnet allocation server and creates a global subnet allocation pool named GLOBAL-POOL from the 10.0.0.0 network. The configuration of the subnet prefix-length command in this example configures each subnet that is allocated from the subnet pool to support 254 host IP addresses.

ip dhcp pool GLOBAL-POOL
 network 10.0.0.0 255.255.255.0
 subnet prefix-length 24

Examples

The following example configures a router to be a subnet allocation server and creates a VPN routing and forwarding (VRF) subnet allocation pool named VRF-POOL from the 172.16.0.0 network and configures the VPN to match the VRF named pool1. The configuration of the subnet prefix-length command in this example configures each subnet that is allocated from the subnet pool to support 62 host IP addresses.

ip dhcp pool VRF-POOL 
 vrf pool1
 network 172.16.0.0 /16
 subnet prefix-length 26

Examples

The following example configures a router to be a subnet allocation server and creates a VRF subnet allocation pool named VPN-POOL from the 192.168.0.0 network and configures the VRF named abc. The VPN ID must match the unique identifier that is assigned to the client site. The route target and route distinguisher are configured in the as-number:network number format. The route target and route distinguisher must match. The configuration of the subnet prefix-length command in this example configures each subnet that is allocated from the subnet pool to support 30 host IP addresses.

ip vrf abc
 rd 100:1
 route-target both 100:1 
 vpn id 1234:123456
!
ip dhcp pool VPN-POOL
 vrf abc
 network 192.168.0.0 /24
 subnet prefix-length /27

Related Commands

Command

Description

ip dhcp database

Configures a Cisco IOS DHCP server to save automatic bindings on a remote host called a database agent.

ip dhcp pool

Enables the IP address of an interface to be automatically configured when a DHCP pool is populated with a subnet from IPCP negotiation.

network (DHCP)

Configures the subnet number and mask for a DHCP address pool on a Cisco IOS DHCP server.

show ip dhcp pool

Displays information about the DHCP pools.

term ip netmask-format

To specify the format in which netmasks are displayed in show command output, use the term ip netmask-formatcommand inEXEC configuration mode. To restore the default display format, use the no form of this command.

term ip netmask-format { bitcount | decimal | hexadecimal }

no term ip netmask-format [ bitcount | decimal | hexadecimal ]

Syntax Description

bitcount

Number of bits in the netmask.

decimal

Netmask dotted decimal notation.

hexadecimal

Netmask hexadecimal format.

Command Default

Netmasks are displayed in dotted decimal format.

Command Modes

EXEC

Command History

Release

Modification

10.3

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

IP uses a 32-bit mask that indicates which address bits belong to the network and subnetwork fields, and which bits belong to the host field. This range of IP addresses is called a netmask. By default, show commands display an IP address and then its netmask in dotted decimal notation. For example, a subnet would be displayed as 131.108.11.55 255.255.255.0.

However, you can specify that the display of the network mask appear in hexadecimal format or bit count format instead. The hexadecimal format is commonly used on UNIX systems. The previous example would be displayed as 131.108.11.55 0XFFFFFF00.

The bitcount format for displaying network masks is to append a slash (/) and the total number of bits in the netmask to the address itself. The previous example would be displayed as 131.108.11.55/24.

Examples

The following example specifies that network masks for the session be displayed in bitcount notation in the output of show commands:

term ip netmask-format bitcount

timers hellotime

To configure timers for hellotime and holdtime messages for a redundancy group, use the timers hellotimecommand in redundancy application protocol configuration mode. To disable the timers in the redundancy group, use the no form of this command.

timers hellotime [msec] seconds holdtime [msec] seconds

no timers hellotime [msec] seconds holdtime [msec] seconds

Syntax Description

msec

(Optional) Specifies the interval, in milliseconds, for hello messages.

seconds

Interval time, in seconds, for hello messages. The range is from 1 to 254.

holdtime

Specifies the hold timer.

msec

Specifies the interval, in milliseconds, for hold time messages.

seconds

Interval time, in milliseconds, for hold time messages. The range is from 6 to 255.

Command Default

The default value for the hellotime interval is 3 seconds and for the holdtime interval is 10 seconds.

Command Modes

Redundancy application protocol configuration (config-red-app-prtc)

Command History

Release

Modification

Cisco IOS XE Release 3.1S

This command was introduced.

Usage Guidelines

The hello time is an interval in which hello messages are sent. The holdtime is the time before the active or the standby device is declared to be in down state. Use the msec keyword to configure the timers in milliseconds.

Note


If you allocate a large amount of memory to the log buffer (e.g. 1 GB), then the CPU and memory utilization of the router increases. This issue is compounded if small intervals are set for the hellotime and the holdtime. If you want to allocate a large amount of memory to the log buffer, we recommend that you accept the default values for the hellotime and holdtime. For the same reason, we also recommend that you do not use the preempt command.


Examples

The following example shows how to configure the hellotime and holdtime messages:

Router# configure terminal
Router(config)# redundancy
Router(config-red)# application redundancy
Router(config-red-app)# protocol 1
Router(config-red-app-prtcl)# timers hellotime 100 holdtime 100

Related Commands

Command

Description

application redundancy

Enters redundancy application configuration mode.

authentication

Configures clear text authentication and MD5 authentication for a redundancy group.

group(firewall)

Enters redundancy application group configuration mode.

name

Configures the redundancy group with a name.

preempt

Enables preemption on the redundancy group.

protocol

Defines a protocol instance in a redundancy group.

trusted-port (DHCPv6 Guard)

To configure a port to become a trusted port, use the trusted-port command in Dynamic Host Configuration Protocol version 6 (DHCPv6) guard configuration mode. To disable this function, use the no form of this command.

trusted-port

no trusted-port

Syntax Description

This command has no arguments or keywords.

Command Default

No ports are trusted.

Command Modes


DHCPv6 guard configuration (config-dhcp-guard)

Command History

Release

Modification

15.2(4)S

This command was introduced.

Usage Guidelines

When the trusted-port command is enabled, messages received on ports that have this policy are not verified.

Examples

The following example defines a DHCPv6 guard policy name as policy1, places the router in DHCPv6 guard configuration mode, and sets the port to trusted:

Router(config)# ipv6 dhcp guard policy policy1
Router(config-dhcp-guard)# trusted-port

Related Commands

Command

Description

ipv6 dhcp guard policy

Defines the DHCPv6 guard policy name.

update arp

To secure dynamic Address Resolution Protocol (ARP) entries in the ARP table to their corresponding DHCP bindings, use the update arpcommand in DHCP pool configuration mode. To disable this command and change secure ARP entries to dynamic ARP entries, use the no form of this command.

update arp

no update arp

Syntax Description

This command has no keywords or arguments.

Command Default

No default behavior or values.

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.2(15)T

This command was introduced.

Usage Guidelines

The update arp DHCP pool configuration command is used to secure ARP table entries and their corresponding DHCP leases. However, existing active leases are not secured. These leases will remain insecure until they are renewed. When the lease is renewed, it is treated as a new lease and will be secured automatically. If this feature is disabled on the DHCP server, all existing secured ARP table entries will automatically change to dynamic ARP entries.

This command can be configured only under the following conditions:

  • DHCP network pools in which bindings are created automatically and destroyed upon lease termination or when the client sends a DHCPRELEASE message.

  • Directly connected clients on LAN interfaces and wireless LAN interfaces.

The configuration of this command is not visible to the client. When this command is configured, secured ARP table entries that are created by a DHCP server cannot be removed from the ARP table by the clear arp-cache command. This is designed behavior. If a secure ARP entry created by the DHCP server must be removed, the clear ip dhcp binding command can be used. This command will clear the DHCP binding and secured ARP table entry.


Note


This command does not secure ARP table entries for BOOTP clients.


Examples

The following example configures the Cisco IOS DHCP server to secure ARP table entries to their corresponding DHCP leases within the DHCP pool named WIRELESS-POOL:

ip dhcp pool WIRELESS-POOL 
 update arp

Related Commands

Command

Description

clear arp-cache

Deletes all dynamic entries from the ARP cache.

clear ip dhcp binding

Deletes an automatic address binding from the Cisco IOS DHCP Server database.

update dns

To dynamically update the Domain Name System (DNS) with address (A) and pointer (PTR) Resource Records (RRs) for some address pools, use the update dns command in global configuration mode. To disable dynamic updates, use the no form of this command.

update dns [ both | never ] [override] [before]

no update dns [ both | never ] [override] [before]

Syntax Description

both

(Optional) Dynamic Host Configuration Protocol (DHCP) server will perform Dynamic DNS (DDNS) updates for both PTR (reverse) and A (forward) RRs associated with addresses assigned from an address pool.

never

(Optional) DHCP server will not perform DDNS updates for any addresses assigned from an address pool.

override

(Optional) DHCP server will perform DDNS updates for PTR RRs associated with addresses assigned from an address pool, even if the DHCP client has specified in the fully qualified domain name (FQDN) option that the server should not perform updates.

before

(Optional) DHCP server will perform DDNS updates before sending the DHCP ACK back to the client. The default is to perform updates after sending the DHCP ACK.

Command Default

No updates are performed.

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.3(8)YA

This command was introduced.

12.3(14)T

This command was integrated into Cisco IOS Release 12.3(14)T.

Usage Guidelines

If you configure the update dns both override command, the DHCP server will perform DDNS updates for both PTR and A RRs associated with addresses assigned from an address pool, even if the DHCP client specified in the FQDN that the server should not.

If the server is configured using this command with or without any of the other keywords, and if the server does not see an FQDN option in the DHCP interaction, then it will assume that the client does not understand DDNS and act as though it were configured to update both A and PTR records on behalf of the client.

Examples

The following example shows how to configure the DHCP to never update the A and PTR RRs:

update dns never

Related Commands

Command

Description

ip ddns update method

Specifies a method of DDNS updates of A and PTR RRs and the maximum interval between the updates.

utilization mark high

To configure the high utilization mark of the current address pool size, use the utilization mark high command in DHCP pool configuration mode. To remove the high utilization mark, use the no form of this command.

utilization mark high percentage-number [log]

no utilization mark high percentage-number [log]

Syntax Description

percentage-number

Percentage of the current pool size.

log

(Optional) Enables the logging of a system message.

Command Default

The default high utilization mark is 100 percent of the current pool size.

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.2(8)T

This command was introduced.

12.4(4)T

The log keyword was added.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

Usage Guidelines

The current pool size is the sum of all addresses in all the subnets in the pool. If the utilization level exceeds the configured high utilization mark, the pool will schedule a subnet request.

This command can be used with both network and on-demand pools. However, in the case of a network pool, only the log option of this command can be used. In the case of an on-demand pool, the autogrow sizeoption of the origin command must be configured.

In certain network deployments, it is important for the network administrator to receive asynchronous notification when the DHCP pools are nearly exhausted so that preventive action can be taken. One common method for such notification is the generation of a system message.

If you use the log option, a system message can be generated for a DHCP pool when the pool utilization exceeds the configured high utilization threshold. A system message can also be generated when the pool's utilization is detected to be below the configured low utilization threshold.

Examples

The following example sets the high utilization mark to 80 percent of the current pool size:

utilization mark high 80

The following pool configuration using the log keyword option generates a system message:

! ip dhcp pool abc 
utilization mark high 30 log 
utilization mark low 25 log 
network 10.1.1.0 255.255.255.248 
! 

The following system message is generated when the second IP address is allocated from the pool:

00:02:01: %DHCPD-6-HIGH_UTIL: Pool "abc" is in high utilization state (2 addresses used out of 6). Threshold set at 30%.

The following system message is generated when one of the two allocated IP addresses is returned to the pool:

00:02:58: %DHCPD-6-LOW_UTIL: Pool "abc" is in low utilization state (1 addresses used out of 6). Threshold set at 25%. 

Related Commands

Command

Description

origin

Configures an address pool as an on-demand address pool.

utilization mark low

Configures the low utilization mark of the current address pool size.

utilization mark low

To configure the low utilization mark of the current address pool size, use the utilization mark low command in DHCP pool configuration mode. To remove the low utilization mark, use the no form of this command.

utilization mark low percentage-number

no utilization mark low percentage-number

Syntax Description

percentage-number

Percentage of the current pool size.

Command Default

The default low utilization mark is 0 percent of the current pool size.

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.2(8)T

This command was introduced.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

Usage Guidelines

The current pool size is the sum of all addresses in all the subnets in the pool. If the utilization level drops below the configured low utilization mark, a subnet release is scheduled from the address pool.

This command can be used with both network and on-demand pools. However, in the case of a network pool, only the log option of this command can be used. In the case of an on-demand pool, the autogrow sizeoption of the origin command must be configured.

In certain network deployments, it is important for the network administrator to receive asynchronous notification when the DHCP pools are nearly exhausted so that preventive action can be taken. One common method for such notification is the generation of a system message.

If you use the log option, a system message can be generated for a DHCP pool when the pool utilization exceeds the configured high utilization threshold. A system message can also be generated when the pool's utilization is detected to be below the configured low utilization threshold.

Examples

The following example sets the low utilization mark to 20 percent of the current pool size:

utilization mark low 20

Related Commands

Command

Description

origin

Configures an address pool as an on-demand address pool.

utilization mark high

Configures the high utilization mark of the current address pool size.

view (DNS)

To access or create the specified Domain Name System (DNS) view list member in the DNS view list and then enter DNS view list member configuration mode, use the view command in DNS view list configuration mode. To remove the specified DNS view list member from the DNS view list, use the no form of this command.

view [ vrf vrf-name ] { default | view-name } order-number

no view [ vrf vrf-name ] { default | view-name } order-number

Syntax Description

vrf vrf-name

(Optional) The vrf-name argument specifies the name of the Virtual Private Network (VPN) routing and forwarding (VRF) instance associated with the DNS view. Default is the global VRF (that is, the VRF whose name is a NULL string).

Note   

If the named VRF does not exist, a warning is displayed but the view is added to the view list anyway. The specified VRF can be defined after the view is added as a member of the view list (and after the view itself is defined).

Note   

More than one DNS view can be associated with a VRF. To uniquely identify a DNS view, specify both the view name (or the default keyword) and the VRF with which it is associated.

default

Specifies that the DNS view is unnamed.

Note   

More than one DNS view can be associated with a VRF. To uniquely identify a DNS view, specify both the view name (or the default keyword) and the VRF with which it is associated.

view-name

String (not to exceed 64 characters) that identifies the name of an existing DNS view.

Note   

If the specified view does not exist, a warning is displayed but the default view list member is added anyway. The specified view can be defined after it is added as a member of DNS view list.

Note   

More than one DNS view can be associated with a VRF. To uniquely identify a DNS view, specify both the view name (or the default keyword) and the VRF with which it is associated.

order-number

Integer from 1 to 2147483647 that specifies the order in which the DNS view is checked, with respect to other DNS views in the same DNS view list.

Tip   

If the order-number values for the DNS views within a DNS view list are configured with large intervals between them (for example, by specifying order-number values such as 10, 20, and 30), additional DNS views can be inserted into the view list quickly without affecting the existing ordering or views in the view list. That is, adding a new view to the view list--or changing the ordering of existing views within the view list--does not require that existing views in the view list be removed from the view list and then added back to the list with new order-number values.

Command Default

No DNS view is accessed or created.

Command Modes

DNS view list configuration

Command History

Release

Modification

12.4(9)T

This command was introduced.

Usage Guidelines

This command enters DNS view list member configuration mode--for the specified view list member--so that usage restrictions can be configured for that view list member. If the DNS view list member does not exist yet, the specified DNS view is added to the DNS view list along with the value that indicates the order in which the view list member is to be checked (relative to the other DNS views in the view list) whenever the router needs to determine which DNS view list member to use to address a DNS query.


Note


The maximum number of DNS views and view lists supported is not specifically limited but is dependent on the amount of memory on the Cisco router. Configuring a larger number of DNS views and view lists uses more router memory, and configuring a larger number of views in the view lists uses more router processor time. For optimum performance, configure no more views and view list members than needed to support your Split DNS query forwarding or query resolution needs.



Note


The parameters {default | view-name} and [vrf vrf-name] identify an existing DNS view, as defined by using the ip dns view command. More than one DNS view can be associated with a VRF. To uniquely identify a DNS view, specify both the view name and the VRF with which it is associated.


The view command can be entered multiple times to specify more than one DNS view in the DNS view list.

To display information about a DNS view list, use the show ip dns view-list command.

Subsequent Operations on a DNS View List Member

After you use the view command to define a DNS view list member and enter DNS view list member configuration mode, you can use any of the following commands to configure usage restrictions for the DNS view list member:

  • restrict authenticated

  • restrict name-group

  • restrict source access-group

These optional, additional restrictions are based on query source authentication, the query hostname, and the query source host IP address, respectively. If none of these optional restrictions are configured for the view list member, the only usage restriction on the view list member is the usage restriction based on its association with a VRF.

Reordering of DNS View List Members

To provide for efficient management of the order of the members in a view list, each view list member definition includes the specification of the position of that member within the list. That is, the order of the members within a view list is defined by explicit specification of position values rather than by the order in which the individual members are added to the list. This enables you to add members to an existing view list or reorder the members within an existing view list without having to remove all the view list members and then redefine the view list membership in the desired order:

Examples

The following example shows how to add the view user3 to the DNS view list userlist5 and assign this view member the order number 40 within the view list. Next, the view user2, associated with the VRF vpn102 and assigned the order number 20 within the view list, is removed from the view list.

Router(config)# ip dns view-list userlist5
 
Router(cfg-dns-view-list)# view user3 40 
Router(cfg-dns-view-list-member)# exit
 
Router(cfg-dns-view-list)# no view vrf vpn102 user2 20
 

Related Commands

Command

Description

ip dns view-list

Enters DNS view list configuration mode so that DNS views can be added to or removed from the ordered list of DNS views.

restrict authenticated

Restricts the use of the DNS view list member to DNS queries for which the DNS query host can be authenticated.

restrict name-group

Restricts the use of the DNS view list member to DNS queries for which the query hostname matches a particular DNS name list.

restrict source access-group

Restricts the use of the DNS view list member to DNS queries for which the query source IP address matches a particular standard ACL.

show ip dns view-list

Displays information about a particular DNS view list or about all configured DNS view lists.

vrf (DHCP pool)

To associate the on-demand address pool with a VPN routing and forwarding instance (VRF) name, use the vrf command in DHCP pool configuration mode. To remove the VRF name, use the no form of this command.

vrf name

no vrf name

Syntax Description

name

Name of the VRF to which the address pool is associated.

Command Default

No default behavior or values

Command Modes

DHCP pool configuration

Command History

Release

Modification

12.2(8)T

This command was introduced.

Usage Guidelines

Associating a pool with a VRF allows overlapping addresses with other pools that are not on the same VRF. Only one pool can be associated with each VRF. If the pool is configured with the origin dhcp command or origin aaa command, the VRF information is sent in the subnet request. If the VRF is configured with an RFC 2685 VPN ID, the VPN ID will be sent instead of the VRF name.

Examples

The following example associates the on-demand address pool with a VRF named pool1:

ip dhcp pool pool1
  origin dhcp subnet size initial 24 autogrow 24
  utilization mark high 85
  utilization mark low 15
  vrf pool1

Related Commands

Command

Description

origin

Configures an address pool as an on-demand address pool.

vrf (DHCPv6 pool)

To associate a Dynamic Host Configuration Protocol for IPv6 (DHCPv6) address pool with a virtual private network (VPN) routing and forwarding (VRF) instance, use the vrf command in DHCPv6 pool configuration mode. To remove the VRF name, use the no form of this command.

vrf name

no vrf name

Syntax Description

name

Name of the VRF with which the address pool is associated.

Command Default

No VRF is associated with the DHCPv6 address pool.

Command Modes


DHCPv6 pool configuration (config-dhcp)

Command History

Release

Modification

15.1(2)S

This command was introduced.

Cisco IOS XE Release 3.3S

This command was integrated into Cisco IOS XE Release 3.3S.

15.3(3)M

This command was integrated into Cisco IOS Release 15.3(3)M.

Examples

The following example shows how to configure an IPv6 pool named pool1, and associate pool1 with a VRF instance named vrf1:

Router(config)# ipv6 dhcp pool pool1
# vrf vrf1

Related Commands

Command

Description

ipv6 dhcp pool

Configures a DHCPv6 configuration information pool and enters DHCPv6 pool configuration mode.

1