Cisco IOS IPv6 Command Reference - IPv6 Commands: show ipv6 rip through snmp-server host [Cisco IOS Software Releases 12.3 Mainline]

Table Of Contents

show ipv6 rip

show ipv6 route

show ipv6 route summary

show ipv6 route vrf

show ipv6 routers

show ipv6 rpf

show ipv6 static

show ipv6 traffic

show ipv6 tunnel

show ipv6 virtual-reassembly

show isis database

show isis ipv6 rib

show isis spf-log

show isis topology

show mls cef ipv6

show mls netflow ipv6

show monitor event-trace vpn-mapper

show mpls forwarding-table

show platform software ipv6-multicast

show platform software vpn

show standby

show vrf

sip address

sip domain-name

snmp-server community

snmp-server engineID remote

snmp-server group

snmp-server host

show ipv6 rip

To display information about current IPv6 Routing Information Protocol (RIP) processes, use the show ipv6 rip command in user EXEC or privileged EXEC mode.

show ipv6 rip [name] [database | next-hops]
Syntax Description

name

(Optional) Name of the RIP process. If the name is not entered, details of all configured RIP processes will be displayed.

database

(Optional) Details of the entries in the specified RIP IPv6 routing table are displayed.

next-hops

(Optional) Details of the specified RIP IPv6 processes next hop addresses are displayed. If no RIP process name is specified, the next hop addresses for all RIP IPv6 processes will be displayed.

Command Default

Information about all current IPv6 RIP processes is displayed.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.0(21)ST

This command was integrated into Cisco IOS Release 12.0(21)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.2(22)S, and the name argument and the database and next-hops keywords were added.

12.2(13)T

The modifications to add the name argument and the database and next-hops keywords were added.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Examples

The following is sample output from the show ipv6 rip command:
Router# show ipv6 rip
RIP process "one", port 521, multicast-group FF02::9, pid 55
     Administrative distance is 25. Maximum paths is 4
     Updates every 30 seconds, expire after 180
     Holddown lasts 0 seconds, garbage collect after 120
     Split horizon is on; poison reverse is off
     Default routes are not generated
     Periodic updates 8883, trigger updates 2
  Interfaces:
    Ethernet2
  Redistribution:
RIP process "two", port 521, multicast-group FF02::9, pid 61
     Administrative distance is 120. Maximum paths is 4
     Updates every 30 seconds, expire after 180
     Holddown lasts 0 seconds, garbage collect after 120
     Split horizon is on; poison reverse is off
     Default routes are not generated
     Periodic updates 8883, trigger updates 0
  Interfaces:
    None
  Redistribution:
Table 157 describes the significant fields shown in the display.

Table 157 show ipv6 rip Field Descriptions

Field

Description

RIP process

The name of the RIP process.

port

The port that the RIP process is using.

multicast-group

The IPv6 multicast group of which the RIP process is a member.

pid

The process identification number (pid) assigned to the RIP process.

Administrative distance

Used to rank the preference of sources of routing information. Connected routes have an administrative distance of 1 and are preferred over the same route learned by a protocol with a larger administrative distance value.

Updates

The value (in seconds) of the update timer.

expire

The interval (in seconds) in which updates expire.

Holddown

The value (in seconds) of the hold-down timer.

garbage collect

The value (in seconds) of the garbage-collect timer.

Split horizon

The split horizon state is either on or off.

poison reverse

The poison reverse state is either on or off.

Default routes

The origination of a default route into RIP. Default routes are either generated or not generated.

Periodic updates

The number of RIP update packets sent on an update timer.

trigger updates

The number of RIP update packets sent as triggered updates.

To display information about a specified IPv6 RIP process database, enter the show ipv6 rip command with the name argument and the database keyword. In the following output for the IPv6 RIP process named one, timer information is displayed, and route 3004::/64 has a route tag set:
Router# show ipv6 rip one database
RIP process "one", local RIB
 2001:72D:1000::/64, metric 2
     Ethernet2/FE80::202:7DFF:FE1A:9472, expires in 168 secs
 2001:72D:2000::/64, metric 2, installed
     Ethernet2/FE80::202:7DFF:FE1A:9472, expires in 168 secs
 2001:72D:3000::/64, metric 2, installed
     Ethernet2/FE80::202:7DFF:FE1A:9472, expires in 168 secs
     Ethernet1/FE80::203:7EBC:FE23:1000, expires in 120 secs
 2001:72D:4000::/64, metric 16, expired, [advertise 119/hold 0]
     Ethernet2/FE80::202:7DFF:FE1A:9472
 3004::/64, metric 2 tag 2A, installed
     Ethernet2/FE80::202:7DFF:FE1A:9472, expires in 168 secs
Table 158 describes the significant fields shown in the display.

Table 158 show ipv6 rip database Field Descriptions

Field

Description

RIP process

The name of the RIP process.

2001:72D:1000::/64

The IPv6 route prefix.

metric

Metric for the route.

installed

Route is installed in the IPv6 routing table.

Ethernet2/FE80::202:7DFF:FE1A:9472

Interface and LL next hop through which the IPv6 route was learned.

expires in

The interval (in seconds) before the route expires.

advertise

For an expired route, the value (in seconds) during which the route will be advertised as expired.

hold

The value (in seconds) of the hold-down timer.

tag

Route tag.

To display information about the next-hops for a specified IPv6 RIP process, enter the show ipv6 rip command with the name argument and the next-hops keyword:
Router# show ipv6 rip one next-hops
RIP process "one", Next Hops
  FE80::210:7BFF:FEC2:ACCF/Ethernet4/2 [1 routes]
  FE80::210:7BFF:FEC2:B286/Ethernet4/2 [2 routes]
Table 159 describes the significant fields shown in the display.

Table 159 show ipv6 rip next-hops Field Descriptions

Field

Description

RIP process

The name of the RIP process.

FE80::210:7BFF:FEC2:ACCF/Ethernet4/2

The next hop address and interface through which it was learned. Next hops are either the addresses of IPv6 RIP neighbors from which we have learned routes, or explicit next hops received in IPv6 RIP advertisements.

Note An IPv6 RIP neighbor may choose to advertise all its routes with an explicit next hop. In this case the address of the neighbor would not appear in the next hop display.

[1 routes]

The number of routes in the IPv6 RIP routing table using the specified next hop.

show ipv6 route

To display the current contents of the IPv6 routing table, use the show ipv6 route command in user EXEC or privileged EXEC mode.

show ipv6 route [ipv6-address | ipv6-prefix/prefix-length | protocol | interface-type interface-number]
Syntax Description

ipv6-address

(Optional) Displays routing information for a specific IPv6 address.

This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

ipv6-prefix

(Optional) Displays routing information for a specific IPv6 network.

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) The 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.

protocol

(Optional) Displays routes for the specified routing protocol using any of these keywords:

bgp, isis, ospf, or rip;

or displays routes for the specified type of route using any of these keywords:

connected, local, static, or the interface keyword for a specific interface.

interface-type

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

interface-number

(Optional) Interface number. For more information about the numbering syntax for supported interface types, use the question mark (?) online help function.

Command Default

All IPv6 routing information for all active routing tables is displayed.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.2(8)T

The isis protocol keyword was added to the command syntax, and the
I1 - ISIS L1, I2 - ISIS L2, and IA - ISIS interarea fields were added to the command output.

12.0(21)ST

This command was integrated into Cisco IOS Release 12.0(21)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S, the timer information was removed, and an indicator was added to display IPv6 MPLS virtual interfaces.

12.2(13)T

This command was integrated into Cisco IOS Release 12.2(13)T, the timer information was removed, and an indicator was added to display IPv6 MPLS virtual interfaces.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S and support for longer prefixes was added.

12.3

The output display for this command was updated to include all possible options.

12.2(25)S

6PE multipath information was added to the display.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Usage Guidelines

The show ipv6 route command provides output similar to the show ip route command, except that the information is IPv6-specific.

When the ipv6-address or ipv6-prefix/prefix-length argument is specified, a longest match lookup is performed from the routing table and only route information for that address or network is displayed. When a routing protocol is specified, only routes for that protocol are displayed. When the connected, local, or static keyword is specified, only that type of route is displayed. When the interface-type interface-number arguments are specified, only the specified interface-specific routes are displayed.

Examples

show ipv6 route Command with No Keyword Specified Example

The following is sample output from the show ipv6 route command when entered without an IPv6 address or prefix specified:
Router# show ipv6 route
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       I1 - ISIS L1, I2 - ISIS L2, IA - IIS interarea
B   3000::/64 [20/0]
     via FE80::A8BB:CCFF:FE02:8B00, Serial6/0
L   4000::2/128 [0/0]
     via ::, Ethernet1/0
C   4000::/64 [0/0]
     via ::, Ethernet1/0
LC  4001::1/128 [0/0]
     via ::, Loopback0
L   5000::2/128 [0/0]
     via ::, Serial6/0
C   5000::/64 [0/0]
     via ::, Serial6/0
S   5432::/48 [1/0]
     via 4000::1, Null
L   FE80::/10 [0/0]
     via ::, Null0
L   FF00::/8 [0/0]
     via ::, Null0
Table 160 describes the significant fields shown in the display.

Table 160 show ipv6 route Field Descriptions

Field

Description

Codes:

Indicates the protocol that derived the route. Values are as follows:

C—Connected

L—Local

S—Static

R—RIP derived

B—BGP derived

I1—ISIS L1—Integrated IS-IS Level 1 derived

I2—ISIS L2—Integrated IS-IS Level 2 derived

IA—ISIS interarea—Integrated IS-IS interarea derived

2001:0DB8:DDDD::/32

Indicates the IPv6 prefix of the remote network.

[200/0]

The first number in the brackets is the administrative distance of the information source; the second number is the metric for the route.

via ::FFFF:192.168.99.70

Specifies the address of the next router to the remote network.

IPv6-mpls

Specifies the interface through which the next router to the specified network can be reached.

Note In this example output, the interface is the IPv6 Multiprotocol Label Switching (MPLS) virtual interface used in the 6PE feature where IPv6 traffic is sent across an IPv4 MPLS backbone from one IPv6 provider edge router to another.

show ipv6 route Command with Address or Prefix Specified Example

When the ipv6-address or ipv6-prefix/prefix-length argument is specified, only route information for that address or network is displayed. The following is sample output from the show ipv6 route command when entered with the IPv6 prefix 2001:200::/35:
Router# show ipv6 route 2001:200::/35
IPv6 Routing Table - 261 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
B 2001:200::/35 [20/3]
  via FE80::60:5C59:9E00:16, Tunnel1
show ipv6 route Command with Protocol Specified Example

When you specify a protocol, only routes for that particular routing protocol are shown. The following is sample output from the show ipv6 route command when entered with the bgp keyword:
Router# show ipv6 route bgp
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
B   3000::/64 [20/0]
     via FE80::A8BB:CCFF:FE02:8B00, Serial6/0
show ipv6 route Command for Local Routes Example

The following is sample output from the show ipv6 route command when entered with the local router address:
Router# show ipv6 route local
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
L   4000::2/128 [0/0]
     via ::, Ethernet1/0
LC  4001::1/128 [0/0]
     via ::, Loopback0
L   5000::2/128 [0/0]
     via ::, Serial6/0
L   FE80::/10 [0/0]
     via ::, Null0
L   FF00::/8 [0/0]
     via ::, Null0
show ipv6 route Command for 6PE Multipath Example'

The following is sample output from the show ipv6 route command when used with the 6PE multipath feature enabled:
Router# show ipv6 route
IPv6 Routing Table - default - 19 entries
Codes:C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
.
.
.
B   4004::/64 [200/0]
     via ::FFFF:172.11.11.1
     via ::FFFF:172.30.30.1
Related Commands

Command

Description

ipv6 route

Establishes a static IPv6 route.

show ipv6 interface

Displays IPv6 interface information.

show ipv6 route summary

Displays the current contents of the IPv6 routing table in summary format.

show ipv6 tunnel

Displays IPv6 tunnel information.

show ipv6 route summary

To display the current contents of the IPv6 routing table in summary format, use the show ipv6 route summary command in user EXEC or privileged EXEC mode.

show ipv6 route summary
Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.0(21)ST

This command was integrated into Cisco IOS Release 12.0(21)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Examples

The following is sample output from the show ipv6 route summary command:
Router# show ipv6 route summary
IPv6 Routing Table Summary - 257 entries
  37 local, 35 connected, 25 static, 0 RIP, 160 BGP
  Number of prefixes:
    /16: 1, /24: 46, /28: 10, /32: 5, /35: 25, /40: 1, /48: 63, /64: 19
    /96: 15, /112: 1, /126: 31, /127: 4, /128: 36 
Table 161 describes the significant fields shown in the display.

Table 161 show ipv6 route summary Field Descriptions

Field

Description

entries

Number of entries in the IPv6 routing table.

Route source

Number of routes that are present in the routing table for each route source, which can be local routes, connected routes, static routes, a routing protocol, prefix and address or name, and longer prefixes and address or name.

Routing protocols can include RIP, IS-IS, OSPF, and BGP.

Other route sources can be connected, local, static, or a specific interface.

Number of prefixes:

Number of routing table entries for given prefix length.

Related Commands

Command

Description

show ipv6 route

Displays the current contents of the IPv6 routing table.

show ipv6 route vrf

To display the IPv6 routing table associated with a Virtual Private Network (VPN) routing and forwarding instance (VRF), use the show ipv6 route vrf command in user EXEC or privileged EXEC mode.

show ipv6 route vrf {vrf-name | vrf-number}
Syntax Description

vrf-name

Name assigned to the VRF.

vrf-number

Hexidecimal number assigned to the VRF.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRB1

This command was integrated into Cisco IOS Release 12.2(33)SRB1.

12.2(33)SXH

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

Usage Guidelines

The show ipv6 route vrf command displays specified information from the IPv6 routing table of a VRF.

Examples

The following is sample output regarding an IPv6 routing table associated with a VRF named cisco1:
Router# show ipv6 route vrf cisco1
IPv6 Routing Table cisco1 - 6 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
C   2001:8::/64 [0/0]
     via ::, FastEthernet0/0
L   2001:8::3/128 [0/0]
     via ::, FastEthernet0/0
B   2002:8::/64 [200/0]
     via ::FFFF:192.168.1.4,
B   2010::/64 [20/1]
     via 2001:8::1,
C   2012::/64 [0/0]
     via ::, Loopback1
L   2012::1/128 [0/0]
     via ::, Loopback1
show ipv6 routers

To display IPv6 router advertisement information received from onlink routers, use the show ipv6 routers command in user EXEC or privileged EXEC mode.

show ipv6 routers [interface-type interface-number] [conflicts]
Syntax Description

interface-type

(Optional) Specifies the interface type.

interface-number

(Optional) Specifies the interface number.

conflicts

(Optional) Displays router advertisements that differ from the advertisements configured for a specified interface.

Command Default

When an interface is not specified, onlink router advertisement information is displayed for all interface types. (The term onlink refers to a locally reachable address on the link.)

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.0(21)ST

This command was integrated into Cisco IOS Release 12.0(21)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.4(2)T

Command output was updated to show the state of the default router preference (DRP) preference value as advertised by other routers.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Usage Guidelines

Routers advertising parameters that differ from the advertisement parameters configured for the interface on which the advertisements are received are marked as conflicting.

Examples

The following is sample output from the show ipv6 routers command when entered without an IPv6 interface type and number:
Router# show ipv6 routers
Router FE80::83B3:60A4 on Tunnel5, last update 3 min
  Hops 0, Lifetime 6000 sec, AddrFlag=0, OtherFlag=0
  Reachable time 0 msec, Retransmit time 0 msec
  Prefix 3FFE:C00:8007::800:207C:4E37/96 autoconfig
    Valid lifetime -1, preferred lifetime -1
Router FE80::290:27FF:FE8C:B709 on Tunnel57, last update 0 min
  Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0
  Reachable time 0 msec, Retransmit time 0 msec 
The following sample output shows a single neighboring router that is advertising a high default router preference and is indicating that it is functioning as a Mobile IPv6 home agent on this link.
Router# show ipv6 routers
Router FE80::100 on Ethernet0/0, last update 0 min
  Hops 64, Lifetime 50 sec, AddrFlag=0, OtherFlag=0, MTU=1500
  HomeAgentFlag=1, Preference=High
  Reachable time 0 msec, Retransmit time 0 msec
  Prefix 2001::100/64 onlink autoconfig
    Valid lifetime 2592000, preferred lifetime 604800
Table 162 describes the significant fields shown in the previous two displays.

Table 162 show ipv6 routers Field Descriptions

Field

Description

Hops

The configured hop limit value for the router advertisement.

Lifetime

The configured Router Lifetime value for the router advertisement. A value of 0 indicates that the router is not a default router. A value other than 0 indicates that the router is a default router.

AddrFlag

If the value is 0, the router advertisement received from the router indicates that addresses are not configured using the stateful autoconfiguration mechanism. If the value is 1, the addresses are configured using this mechanism.

OtherFlag

If the value is 0, the router advertisement received from the router indicates that information other than addresses is not obtained using the stateful autoconfiguration mechanism. If the value is 1, other information is obtained using this mechanism. (The value of OtherFlag can be 1 only if the value of AddrFlag is 1.)

MTU

The maximum transmission unit (MTU).

HomeAgentFlag=1

The value can be either 0 or 1. A value of 1 indicates that the router from which the RouterAdvertisement was received is functioning as a Mobile IPv6 home agent on this link, and a value of 0 indicates it is not functioning as a Mobile IPv6 home agent on this link.

Preference=High

The default router preference. The value can be high, medium, or low.

Retransmit time

The configured RetransTimer value. The time value to be used on this link for neighbor solicitation transmissions, which are used in address resolution and neighbor unreachability detection. A value of 0 means the time value is not specified by the advertising router.

Prefix

A prefix advertised by the router. Also indicates if onlink or autoconfig bits were set in the router advertisement message.

Valid lifetime

The length of time (in seconds) relative to the time the advertisement is sent that the prefix is valid for the purpose of onlink determination. A value of -1 (all ones, 0xffffffff) represents infinity.

preferred lifetime

The length of time (in seconds) relative to the time the advertisements is sent that addresses generated from the prefix via address autoconfiguration remain valid. A value of -1 (all ones, 0xffffffff) represents infinity.

When the interface-type and interface-number arguments are specified, router advertisement details about that specific interface are displayed. The following is sample output from the show ipv6 routers command when entered with an interface type and number:
Router# show ipv6 routers tunnel 5
Router FE80::83B3:60A4 on Tunnel5, last update 5 min
  Hops 0, Lifetime 6000 sec, AddrFlag=0, OtherFlag=0
  Reachable time 0 msec, Retransmit time 0 msec
  Prefix 3FFE:C00:8007::800:207C:4E37/96 autoconfig
    Valid lifetime -1, preferred lifetime -1 
Entering the conflicts keyword with the show ipv6 routers command displays information for routers that are advertising parameters different from the parameters configured for the interface on which the advertisements are being received, as the following sample output shows:
Router# show ipv6 routers conflicts
Router FE80::203:FDFF:FE34:7039 on Ethernet1, last update 1 min, CONFLICT
   Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0
   Reachable time 0 msec, Retransmit time 0 msec
   Prefix 2003::/64 onlink autoconfig
     Valid lifetime -1, preferred lifetime -1
Router FE80::201:42FF:FECA:A5C on Ethernet1, last update 0 min, CONFLICT
   Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0
   Reachable time 0 msec, Retransmit time 0 msec
   Prefix 2001::/64 onlink autoconfig
     Valid lifetime -1, preferred lifetime -1
show ipv6 rpf

To check Reverse Path Forwarding (RPF) information for a given unicast host address and prefix, use the show ipv6 rpf command in user EXEC or privileged EXEC mode.

show ipv6 rpf ipv6-prefix
Syntax Description

ipv6-prefix

Summary prefix designated for a range of IPv6 prefixes.

The ipv6-prefix argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.0(26)S

This command was introduced.

12.3(4)T

This command was integrated into Cisco IOS Release 12.3(4)T.

12.2(25)S

This command was integrated into Cisco IOS Release 12.2(25)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(33)SRA

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

12.2(33)SXH

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

Usage Guidelines

The show ipv6 rpf command displays how IPv6 multicast routing performs RPF. Because the router can find RPF information from multiple routing tables (for example, unicast Routing Information Base [RIB], multiprotocol Border Gateway Protocol [BGP] routing table, or static mroutes), the show ipv6 rpf command displays the source from which the information is retrieved.

Examples

The following example displays RPF information for the unicast host with the IPv6 address of 2001::1:1:2:
Router# show ipv6 rpf 2001::1:1:2
RPF information for 2001::1:1:2
  RPF interface:Ethernet3/2
  RPF neighbor:FE80::40:1:3
  RPF route/mask:20::/64
  RPF type:Unicast
  RPF recursion count:0
  Metric preference:110
  Metric:30
Table 163 describes the significant fields shown in the display.

Table 163 show ipv6 rpf Field Descriptions

Field

Description

RPF information for 2001::1:1:2

Source address that this information concerns.

RPF interface:Ethernet3/2

For the given source, the interface from which the router expects to get packets.

RPF neighbor:FE80::40:1:3

For the given source, the neighbor from which the router expects to get packets.

RPF route/mask:20::/64

Route number and mask that matched against this source.

RPF type:Unicast

Routing table from which this route was obtained, either unicast, multiprotocol BGP, or static mroutes.

RPF recursion count

Indicates the number of times the route is recursively resolved.

Metric preference:110

The preference value used for selecting the unicast routing metric to the route processor (RP) announced by the designated forwarder (DF).

Metric:30

Unicast routing metric to the RP announced by the DF.

show ipv6 static

To display the current contents of the IPv6 routing table, use the show ipv6 static command in user EXEC or privileged EXEC mode.

show ipv6 static [ipv6-address | ipv6-prefix/prefix-length] [interface type number | recursive] [detail]
Syntax Description

ipv6-address

(Optional) Displays routing information for a specific IPv6 address.

This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.

ipv6-prefix

(Optional) Displays routing information for a specific IPv6 network.

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) The 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.

interface

(Optional) Name of a routing protocol, or the connected, local, or static keyword. If you specify a routing protocol, use the bgp, isis, or rip keyword.

type

(Optional, but required if interface keyword is used) Interface type. For a list of supported interface types, use the question mark (?) online help function.

number

(Optional, but required if interface keyword is used) Interface number. For specific numbering syntax for supported interface types, use the question mark (?) online help function.

recursive

(Optional) Displays recursive static routes only. The recursive keyword is mutually exclusive with the interface keyword, but it may be used with or without the IPv6 prefix included in the command syntax.

detail

(Optional) Specifies the following additional information:

•For valid recursive routes, the output path set and maximum resolution depth.

•For invalid recursive routes, the reason why the route is not valid.

•For invalid direct or fully specified routes, the reason why the route is not valid.

Command Default

All IPv6 routing information for all active routing tables is displayed.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(4)T

This command was introduced.

12.2(25)S

This command was integrated into Cisco IOS Release 12.2(25)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Usage Guidelines

The show ipv6 static command provides output similar to the show ip route command, except that it is IPv6-specific.

When the ipv6-address or ipv6-prefix/prefix-length argument is specified, a longest match lookup is performed from the routing table and only route information for that address or network is displayed. Only the information matching the criteria specified in the command syntax is displayed. For example, when the type number arguments are specified, only the specified interface-specific routes are displayed.

Using the recursive and interface Keywords

The recursive and interface keywords are mutually exclusive, but they can each be used when the IPv6 prefix is specified in the command statement.

Examples

show ipv6 static with No Options Specified in the Command Syntax Example

When no options specified in the command, those routes installed in the IPv6 Routing Information Base (RIB) are marked with an asterisk, as shown in the following example:
Router# show ipv6 static
IPv6 Static routes
Code: * - installed in RIB
* 3000::/16, interface Ethernet1/0, distance 1
* 4000::/16, via nexthop 2001:1::1, distance 1
  5000::/16, interface Ethernet3/0, distance 1
* 5555::/16, via nexthop 4000::1, distance 1
  5555::/16, via nexthop 9999::1, distance 1
* 5555::/16, interface Ethernet2/0, distance 1
* 6000::/16, via nexthop 2007::1, interface Ethernet1/0, distance 1
Table 164 describes the significant fields shown in the display.

Table 164 show ipv6 static Field Descriptions

Field

Description

via nexthop

Specifies the address of the next router in the path to the remote network.

distance n

Indicates the administrative distance to the specified route.

show ipv6 static with the IPv6 Address and Prefix Example

When the ipv6-address or ipv6-prefix/prefix-length argument is specified, only information about static routes for that address or network is displayed. The following is sample output from the show ipv6 route command when entered with the IPv6 prefix 2001:200::/35:
Router# show ipv6 static 2001:200::/35
IPv6 Static routes
Code: * - installed in RIB
* 2001:200::/35, via nexthop 4000::1, distance 1
  2001:200::/35, via nexthop 9999::1, distance 1
* 2001:200::/35, interface Ethernet2/0, distance 1
show ipv6 static interface Example

When an interface is supplied, only those static routes with the specified interface as outgoing interface are displayed. The interface keyword may be used with or without the IPv6 address and prefix specified in the command statement.

Router# show ipv6 static interface e 3/0

IPv6 Static routes

Code: * - installed in RIB

5000::/16, interface Ethernet3/0, distance 1

show ipv6 static recursive Example

When the recursive keyword is specified, only recursive static routes are displayed:
Router# show ipv6 static recursive
IPv6 Static routes

Code: * - installed in RIB

* 4000::/16, via nexthop 2001:1::1, distance 1

* 5555::/16, via nexthop 4000::1, distance 1

5555::/16, via nexthop 9999::1, distance 1

show ipv6 static detail Example

When the detail keyword is specified, the following additional information is displayed:

•For valid recursive routes, the output path set and maximum resolution depth.

•For invalid recursive routes, the reason why the route is not valid.

•For invalid direct or fully specified routes, the reason why the route is not valid.
Router# show ipv6 static detail
IPv6 Static routes
Code: * - installed in RIB
* 3000::/16, interface Ethernet1/0, distance 1
* 4000::/16, via nexthop 2001:1::1, distance 1
     Resolves to 1 paths (max depth 1)
     via Ethernet1/0
  5000::/16, interface Ethernet3/0, distance 1
     Interface is down
* 5555::/16, via nexthop 4000::1, distance 1
     Resolves to 1 paths (max depth 2)
     via Ethernet1/0
  5555::/16, via nexthop 9999::1, distance 1
     Route does not fully resolve
* 5555::/16, interface Ethernet2/0, distance 1
* 6000::/16, via nexthop 2007::1, interface Ethernet1/0, distance 1
Related Commands

Command

Description

ipv6 route

Establishes a static IPv6 route.

show ipv6 interface

Displays IPv6 interface information.

show ipv6 route summary

Displays the current contents of the IPv6 routing table in summary format.

show ipv6 tunnel

Displays IPv6 tunnel information.

show ipv6 traffic

To display statistics about IPv6 traffic, use the show ipv6 traffic command in user EXEC or privileged EXEC mode.

show ipv6 traffic
Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.0(21)ST

This command was integrated into Cisco IOS Release 12.0(21)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S, and output fields were added.

12.2(13)T

The modification to add output fields was integrated into this release.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

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

12.2(33)SXH

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

Usage Guidelines

The show ipv6 traffic command provides output similar to the show ip traffic command, except that it is IPv6-specific.

Examples

The following is sample output from the show ipv6 traffic command:
Router# show ipv6 traffic
IPv6 statistics:
  Rcvd:  0 total, 0 local destination
         0 source-routed, 0 truncated
         0 format errors, 0 hop count exceeded
         0 bad header, 0 unknown option, 0 bad source
         0 unknown protocol, 0 not a router
         0 fragments, 0 total reassembled
         0 reassembly timeouts, 0 reassembly failures
         0 unicast RPF drop, 0 suppressed RPF drop
  Sent:  0 generated, 0 forwarded
         0 fragmented into 0 fragments, 0 failed
         0 encapsulation failed, 0 no route, 0 too big
  Mcast: 0 received, 0 sent
ICMP statistics:
  Rcvd: 0 input, 0 checksum errors, 0 too short
        0 unknown info type, 0 unknown error type
        unreach: 0 routing, 0 admin, 0 neighbor, 0 address, 0 port
        parameter: 0 error, 0 header, 0 option
        0 hopcount expired, 0 reassembly timeout,0 too big
        0 echo request, 0 echo reply
        0 group query, 0 group report, 0 group reduce
        0 router solicit, 0 router advert, 0 redirects
The following is sample output for the show ipv6 interface command without IPv6 CEF running:
Router# show ipv6 interface ethernet 0/1/1
Ethernet0/1/1 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::203:FDFF:FE49:9
  Description: sat-2900a f0/12
  Global unicast address(es):
    7::7, subnet is 7::/32
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:7
    FF02::1:FF49:9
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  Input features: RPF
  Unicast RPF access-list MINI
    Process Switching: 
      0 verification drops
      0 suppressed verification drops
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds
The following is sample output for the show ipv6 interface command with IPv6 CEF running:
Router# show ipv6 interface ethernet 0/1/1
Ethernet0/1/1 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::203:FDFF:FE49:9
  Description: sat-2900a f0/12
  Global unicast address(es):
    7::7, subnet is 7::/32
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:7
    FF02::1:FF49:9
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  Input features: RPF
  Unicast RPF access-list MINI
    Process Switching:
      0 verification drops
      0 suppressed verification drops
    CEF Switching: 
      0 verification drops 
      0 suppressed verification drops 
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds
  ND advertised reachable time is 0 milliseconds
  ND advertised retransmit interval is 0 milliseconds
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  Hosts use stateless autoconfig for addresses.
Table 165 describes the significant fields shown in the display.

Table 165 show ipv6 traffic Field Descriptions

Field

Description

source-routed

Number of source-routed packets.

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