Cisco IOS IPv6 Command Reference
IPv6 Commands: show ipv6 lo to show ipv6 mt
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IPv6 Commands: show ipv6 lo to show ipv6 mt

IPv6 Commands: show ipv6 lo to show ipv6 mt

show ipv6 local pool

To display information about any defined IPv6 address pools, use the show ipv6 local pool command in privileged EXEC mode.

show ipv6 local pool [ poolname [cache] ]

Syntax Description

poolname

(Optional) User-defined name for the local address pool.

cache

(Optional) Indicates that cache statistics are to be included in the output display

Command Modes


Privileged EXEC

Command History

Release

Modification

12.2(13)T

This command was introduced.

Usage Guidelines

If you omit the poolnameargument, the command displays a generic list of all defined address pools and the IP addresses that belong to them. If you specify the poolname argument, the command displays detailed information about that pool.

Examples

The following command displays IPv6 prefix pool information, which includes cache statistics:

Router# show ipv6 local pool mypool 
Prefix is 2001:0DB8::/29 assign /64 prefix
2 entries in use, 254 available, 0 rejected
0 entries cached, 1000 maximum
 
User           Prefix               Interface
joe            3FFE:FFFF:A::/64      Vi1
john           3FFE:FFFF:A:1::/64    Vi2

The following command displays IPv6 prefix pool information for all prefix pools:

Router# show ipv6 local pool
 
Pool Prefix Free In use 
mypool 2001:0DB8::/29 65516 20 
myrouter#
myrouter# show ipv6 local pool mypool 
Prefix is 1234::/48 assign /64 prefix 
20 entries in use, 65516 available, 0 rejected 
0 entries cached, 1000 maximum
User Prefix Interface 
user1-72b 1234::/64 Vi1.21 
user1-72b 1234:0:0:1::/64 Vi1.22 
user1-72b 1234:0:0:2::/64 Vi1.23 
user1-72b 1234:0:0:3::/64 Vi1.24 
user1-72b 1234:0:0:4::/64 Vi1.25 
user1-72b 1234:0:0:5::/64 Vi1.26 
user1-72b 1234:0:0:6::/64 Vi1.27 
user1-72b 1234:0:0:7::/64 Vi1.28 
user1-72b 1234:0:0:8::/64 Vi1.29 
user1-72b 1234:0:0:9::/64 Vi1.30 
user1-72b 1234:0:0:A::/64 Vi1.31 
user1-72b 1234:0:0:B::/64 Vi1.32 
user1-72b 1234:0:0:C::/64 Vi1.33 
user1-72b 1234:0:0:D::/64 Vi1.34 
user1-72b 1234:0:0:E::/64 Vi1.35 
user1-72b 1234:0:0:F::/64 Vi1.36 
user1-72b 1234:0:0:10::/64 Vi1.37 
user1-72b 1234:0:0:11::/64 Vi1.38 
user1-72b 1234:0:0:12::/64 Vi1.39 
user1-72b 1234:0:0:13::/64 Vi1.40

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

Table 1 show ipv6 local pool Field Descriptions

Field

Description

Scope

The type of access.

Pool

Pool and group names and associations, if created.

Begin

The first IP address in the defined range of addresses in this pool.

End

The last IP address in the defined range of addresses in this pool.

Free

The number of addresses available.

InUse

The number of addresses in use.

Related Commands

Command

Description

ipv6 local pool

Configures a local pool of IPv6 addresses to be used when a remote peer connects to a point-to-point interface.

show ipv6 mfib

To display the forwarding entries and interfaces in the IPv6 Multicast Forwarding Information Base (MFIB), use the show ipv6 mfib command in user EXEC or privileged EXEC mode.

Cisco 3660 Series Routers, Cisco 10000 Series Routers, and Catalyst 6500 Series Routers

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope | verbose | group-address-name | ipv6-prefix/ prefix-length | source-address-name | interface | status | summary ]

Cisco 7600 Series Routers

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope | verbose | interface | status | summary ]

Syntax Description

vrf vrf-name

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

all

(Optional) Displays all forwarding entries and interfaces in the IPv6 MFIB.

linkscope

(Optional) Displays the link-local groups.

verbose

(Optional) Provides additional information, such as the MAC encapsulation header and platform-specific information.

ipv6-prefix

(Optional) The IPv6 network assigned to the interface. The default IPv6 prefix is 128.

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.

group-address-name

(Optional) IPv6 address or name of the multicast group.

source-address-name

(Optional) IPv6 address or name of the multicast group.

interface

(Optional) Interface settings and status.

status

(Optional) General settings and status.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.2(18)SXE

Support for this command was added for the Supervisor Engine 720.

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.

12.3(4)T

The link-local keyword was added.

12.3(7)T

The ipv6-prefix and prefix-length arguments were added.

12.2(33)SXH

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

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

Use the show ipv6 mfib command to display MFIB entries; and forwarding interfaces, and their traffic statistics. This command can be enabled on virtual IP (VIP) if the router is operating in distributed mode.

A forwarding entry in the MFIB has flags that determine the default forwarding and signaling behavior to use for packets matching the entry. The entry also has per-interface flags that further specify the forwarding behavior for packets received or forwarded on specific interfaces. The table below describes the MFIB forwarding entries and interface flags.

Table 2 MFIB Entries and Interface Flags

Flag

Description

F

Forward--Data is forwarded out of this interface.

A

Accept--Data received on this interface is accepted for forwarding.

IC

Internal copy--Deliver to the router a copy of the packets received or forwarded on this interface.

NS

Negate signal--Reverse the default entry signaling behavior for packets received on this interface.

DP

Do not preserve--When signaling the reception of a packet on this interface, do not preserve a copy of it (discard it instead).

SP

Signal present--The reception of a packet on this interface was just signaled.

S

Signal--By default, signal the reception of packets matching this entry.

C

Perform directly connected check for packets matching this entry. Signal the reception if packets were originated by a directly connected source.

Examples

The following example displays the forwarding entries and interfaces in the MFIB. The router is configured for fast switching, and it has a receiver joined to FF05::1 on Ethernet1/1 and a source (2001::1:1:20) sending on Ethernet1/2:

Router# show ipv6 mfib
IP Multicast Forwarding Information Base
Entry Flags: C - Directly Connected, S - Signal, IA - Inherit A flag,
             AR - Activity Required, D - Drop
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kbits per second
Other counts: Total/RPF failed/Other drops
Interface Flags: A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts: FS Pkt Count/PS Pkt Count
(*,FF00::/8) Flags: C
   Forwarding: 0/0/0/0, Other: 0/0/0
   Tunnel0 Flags: NS
(*,FF00::/15) Flags: D
   Forwarding: 0/0/0/0, Other: 0/0/0
(*,FF05::1) Flags: C
   Forwarding: 2/0/100/0, Other: 0/0/0
   Tunnel0 Flags: A NS
   Ethernet1/1 Flags: F NS
     Pkts: 0/2
(2001::1:1:200,FF05::1) Flags:
   Forwarding: 5/0/100/0, Other: 0/0/0
   Ethernet1/2 Flags: A
   Ethernet1/1 Flags: F NS
     Pkts: 3/2
(*,FF10::/15) Flags: D
   Forwarding: 0/0/0/0, Other: 0/0/0

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

Table 3 show ipv6 mfib Field Descriptions

Field

Description

Entry Flags

Information about the entry.

Forwarding Counts

Statistics on the packets that are received from and forwarded to at least one interface.

Pkt Count/

Total number of packets received and forwarded since the creation of the multicast forwarding state to which this counter applies.

Pkts per second/

Number of packets received and forwarded per second.

Avg Pkt Size/

Total number of bytes divided by the total number of packets for this multicast forwarding state. There is no direct display for the total number of bytes. You can calculate the total number of bytes by multiplying the average packet size by the packet count.

Kbits per second

Bytes per second divided by packets per second divided by 1000.

Other counts:

Statistics on the received packets. These counters include statistics about the packets received and forwarded and packets received but not forwarded.

Interface Flags:

Information about the interface.

Interface Counts:

Interface statistics.

The following example shows forwarding entries and interfaces in the MFIB, with a group address of FF03:1::1 specified:

Router# show ipv6 mfib FF03:1::1
IP Multicast Forwarding Information Base
Entry Flags:C - Directly Connected, S - Signal, IA - Inherit A
flag,
            AR - Activity Required, D - Drop
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kbits per
second
Other counts:Total/RPF failed/Other drops
Interface Flags:A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts:FS Pkt Count/PS Pkt Count
*,FF03:1::1) Flags:C
  Forwarding:0/0/0/0, Other:0/0/0
  Tunnel1 Flags:A NS
  GigabitEthernet5/0.25 Flags:F NS
    Pkts:0/0
  GigabitEthernet5/0.24 Flags:F NS
    Pkts:0/0
(5002:1::2,FF03:1::1) Flags:
  Forwarding:71505/0/50/0, Other:42/0/42
  GigabitEthernet5/0 Flags:A
  GigabitEthernet5/0.19 Flags:F NS
    Pkts:239/24
  GigabitEthernet5/0.20 Flags:F NS
    Pkts:239/24
  GigabitEthernet5/0.21 Flags:F NS
    Pkts:238/24
.
.
.
GigabitEthernet5/0.16 Flags:F NS
Pkts:71628/24

The following example shows forwarding entries and interfaces in the MFIB, with a group address of FF03:1::1 and a source address of 5002:1::2 specified:

Router# show ipv6 mfib FF03:1::1 5002:1::2
 
IP Multicast Forwarding Information Base
Entry Flags:C - Directly Connected, S - Signal, IA - Inherit A flag,
             AR - Activity Required, D - Drop
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kbits per second
Other counts:Total/RPF failed/Other drops
Interface Flags:A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts:FS Pkt Count/PS Pkt Count
(5002:1::2,FF03:1::1) Flags:
   Forwarding:71505/0/50/0, Other:42/0/42
   GigabitEthernet5/0 Flags:A
   GigabitEthernet5/0.19 Flags:F NS
     Pkts:239/24
   GigabitEthernet5/0.20 Flags:F NS
     Pkts:239/24
.
.
.
   GigabitEthernet5/0.16 Flags:F NS
     Pkts:71628/24

The following example shows forwarding entries and interfaces in the MFIB, with a group address of FF03:1::1 and a default prefix of 128:

Router# show ipv6 mfib FF03:1::1/128
IP Multicast Forwarding Information Base
Entry Flags:C - Directly Connected, S - Signal, IA - Inherit A flag,
             AR - Activity Required, D - Drop
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kbits per second
Other counts:Total/RPF failed/Other drops
Interface Flags:A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts:FS Pkt Count/PS Pkt Count
(*,FF03:1::1) Flags:C
   Forwarding:0/0/0/0, Other:0/0/0
   Tunnel1 Flags:A NS
   GigabitEthernet5/0.25 Flags:F NS
     Pkts:0/0
   GigabitEthernet5/0.24 Flags:F NS
     Pkts:0/0
.
.
.
   GigabitEthernet5/0.16 Flags:F NS
     Pkts:0/0

The following example shows forwarding entries and interfaces in the MFIB, with a group address of FFE0 and a prefix of 15:

Router# show ipv6 mfib FFE0::/15
IP Multicast Forwarding Information Base
Entry Flags:C - Directly Connected, S - Signal, IA - Inherit A flag,
             AR - Activity Required, D - Drop
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kbits per second
Other counts:Total/RPF failed/Other drops
Interface Flags:A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts:FS Pkt Count/PS Pkt Count
(*,FFE0::/15) Flags:D
   Forwarding:0/0/0/0, Other:0/0/0

The following example shows output of the show ipv6 mfib command used with the verbose keyword. It shows forwarding entries and interfaces in the MFIB and additional information such as the MAC encapsulation header and platform-specific information.

Router# show ipv6 mfib ff33::1:1 verbose
IP Multicast Forwarding Information Base
Entry Flags: C - Directly Connected, S - Signal, IA - Inherit A flag,
             AR - Activity Required, K - Keepalive
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kbits per second
Other counts: Total/RPF failed/Other drops
Platform per slot HW-Forwarding Counts: Pkt Count/Byte Count
Platform flags: HF - Forwarding entry,HB - Bridge entry,HD - NonRPF Drop entry,
                NP - Not platform switchable,RPL - RPF-ltl linkage,
                MCG - Metset change,ERR - S/w Error Flag,RTY - In RetryQ,
                LP - L3 pending,MP - Met pending,AP - ACL pending
Interface Flags: A - Accept, F - Forward, NS - Negate Signalling 
             IC - Internal Copy, NP - Not platform switched
             SP - Signal Present
Interface Counts: Distributed FS Pkt Count/FS Pkt Count/PS Pkt Count
(10::2,FF33::1:1) Flags: K
   RP Forwarding: 0/0/0/0, Other: 0/0/0
   LC Forwarding: 0/0/0/0, Other: 0/0/0
   HW Forwd:   0/0/0/0, Other: NA/NA/NA
   Slot 6: HW Forwarding: 0/0, Platform Flags:  HF RPL
   Slot 1: HW Forwarding: 0/0, Platform Flags:  HF RPL
   Vlan10 Flags: A
   Vlan30 Flags: F NS
     Pkts: 0/0/0 MAC: 33330001000100D0FFFE180086DD

The table below describes the fields shown in the display.

Table 4 show ipv6 mfib verbose Field Descriptions

Field

Description

Platform flags

Information about the platform.

Platform per slot HW-Forwarding Counts

Total number of packets per bytes forwarded.

Related Commands

Command

Description

show ipv6 mfib active

Displays the rate at which active sources are sending to multicast groups.

show ipv6 mfib count

Displays summary traffic statistics from the MFIB about the group and source.

show ipv6 mfib interface

Displays information about IPv6 multicast-enabled interfaces and their forwarding status.

show ipv6 mfib status

Displays the general MFIB configuration and operational status.

show ipv6 mfib summary

Displays summary information about the number of IPv6 MFIB entries (including link-local groups) and interfaces.

show ipv6 mfib active

To display the rate at which active sources are sending to multicast groups, use the show ipv6 mfib active command in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope ] active [kbps]

Syntax Description

vrf vrf-name

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

all

(Optional) Displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to both linkscope (reserved) and nonlinkscope (nonreserved) groups.

linkscope

(Optional) Displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to linkscope (reserved) groups.

kbps

(Optional) Kilobits per second.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Usage Guidelines

Use the show ipv6 mfib active command to display MFIB entries actively used to forward packets. In many cases, it is useful to provide the optional kbps argument to limit the set of entries displayed to the ones that are forwarding an amount of traffic larger or equal to the amount set by the kbps argument.

Examples

The following example displays statistics on the rate at which active IP multicast sources are sending information. The router is switching traffic from 2001::1:1:200 to FF05::1:

Router# show ipv6 mfib active
Active IPv6 Multicast Sources - sending >= 4 kbps
Group: FF05::1
  Source: 2001::1:1:200
    Rate: 20 pps/16 kbps(1sec), 0 kbps(last 128 sec)

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

Table 5 show ipv6 mfib active Field Descriptions

Field

Description

Group:

Summary information about counters for (*, G) and the range of (S, G) states for one particular group G. The following RP-tree: and Source: output fields contain information about the individual states belonging to this group.

Note   

For Source Specific Multicast (PIM-SSM) range groups, the Group: displays are statistical. All SSM range (S, G) states are individual, unrelated SSM channels.

Rate...kbps

Bytes per second divided by packets per second divided by 1000. On an IP multicast fast-switching platform, the number of packets per second is the number of packets during the last second. Other platforms may use a different approach to calculate this number. Refer to the platform documentation for more information.

show ipv6 mfib count

To display summary traffic statistics from the IPv6 Multicast Forwarding Information Base (MFIB) about multicast sources and groups, use the show ipv6 mfib count command in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope ] count

Syntax Description

vrf vrf-name

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

all

(Optional) Displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to both linkscope (reserved) and nonlinkscope (nonreserved) groups.

linkscope

(Optional) Displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to linkscope (reserved) groups.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was integrated into Cisco IOS XE Release 2.1.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Usage Guidelines

Use the show ipv6 mfib count command to display the average packet size and data rate in kilobits per seconds.

Examples

The following example displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to both reserved and nonreserved groups:

Router# show ipv6 mfib all count
 

show ipv6 mfib global

To display information from the IPv6 Multicast Forwarding Information Base (MFIB) global table, use the show ipv6 mfib active command in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope ] global

Syntax Description

vrf vrf-name

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

all

(Optional) Displays information in the IPv6 MFIB global table for both linkscope (reserved) and nonlinkscope (nonreserved) groups.

linkscope

(Optional) Displays information in the IPv6 MFIB global table for linkscope groups.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Usage Guidelines

If no optional keywords or arguments are entered, global table information in the IPv6 MFIB associated with nonlinkscope multicast groups are displayed.

Examples

The following example enables you to display IPv6 MFIB global table information:

Router# show ipv6 mfib global

show ipv6 mfib instance

To display information about an IPv6 Multicast Forwarding Information Base (MFIB) table instance, use the show ipv6 mfib instancecommand in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope ] instance

Syntax Description

vrf vrf-name

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

all

(Optional) Displays all information about a.

linkscope

(Optional) Displays a summary of traffic statistics from the IPv6 MFIB about multicast sources sending to linkscope (reserved) groups.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Examples

The following example enables you to display IPv6 MFIB instance information:

Router# show ipv6 mfib instance

show ipv6 mfib interface

To display information about IPv6 multicast-enabled interfaces and their forwarding status, use the show ipv6 mfib interface command in user EXEC or privileged EXEC mode.

show ipv6 mfib interface

Syntax Description

This command has no arguments or keywords.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

The show ipv6 mfib interface command displays the Multicast Forwarding Information Base (MFIB) interfaces and in what switching mode each MFIB has been configured.

Examples

The following example displays information about IPv6 multicast-enabled interfaces and their forwarding status. The router is configured for fast switching.

Router# show ipv6 mfib interface
IPv6 Multicast Forwarding (MFIB) status:
    Configuration Status: enabled
    Operational Status: running
MFIB interface       status    CEF-based output   
                            [configured,available]
Ethernet1/1          up     [yes       ,yes      ]
Ethernet1/2          up     [yes       ,?        ]
Tunnel0              up     [yes       ,?        ]
Tunnel1              up     [yes       ,?        ]

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

Table 6 show ipv6 mfib interface Field Descriptions

Field

Description

MFIB interface

Specifies the MFIB interface.

Status

Specifies the status of the MFIB interface.

CEF-based output

Provides information on the Cisco Express Forwarding-based output of the MFIB interface.

show ipv6 mfib route

To display the forwarding entries and interfaces in the IPv6 Multicast Forwarding Information Base (MFIB) without packet header information and forwarding counters, use the show ipv6 mfib routecommand in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] [ all | linkscope ] route

Syntax Description

vrf vrf-name

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

all

(Optional) Displays the forwarding entries and interfaces in the IPv6 MFIB for both linkscope (reserved) and nonlinkscope (nonreserved) groups.

linkscope

(Optional) Displays the forwarding entries and interfaces in the IPv6 MFIB for linkscope (reserved) groups.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(1)M

This command was modified. The link-local keyword was changed to linkscope.

Cisco IOS Release 15.1(1)S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

Cisco IOS XE Release 3.2S

This command was modified. New counters were added to the output to show (*,G/m) and the total number of unique groups in the database.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Examples

The following example enables you to display IPv6 MFIB instance information:

Router# show ipv6 mfib instance

show ipv6 mfib status

To display the general Multicast Forwarding Information Base (MFIB) configuration and operational status, use the show ipv6 mfib status command in user EXEC or privileged EXEC mode.

show ipv6 mfib status

Syntax Description

This command has no arguments or keywords.

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(28)SB

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

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

Use the show ipv6 mfib status to find such information as whether or not MFIB is enabled and running.

Examples

The following example displays MFIB information:

Router# show ipv6 mfib status
IPv6 Multicast Forwarding (MFIB) status:
    Configuration Status: enabled
    Operational Status: not running
    Notes: MFIB not running because multicast routing is disabled

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

Table 7 show ipv6 mfib status Field Descriptions

Field

Description

Configuration status: enabled

MFIB is enabled on the device.

Operational status: not running

Although MFIB is enabled on the device, it is not running.

Notes:

Information about MFIB configuration and operational status.

show ipv6 mfib summary

To display summary information about the number of IPv6 Multicast Forwarding Information Base (MFIB) entries (including link-local groups) and interfaces, use the show ipv6 mfib summary command in user EXEC or privileged EXEC mode.

show ipv6 mfib [ vrf vrf-name ] summary

Syntax Description

vrf vrf-name

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

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

The show ipv6 mfib summary command shows the IP multicast routing table in abbreviated form. The command displays only the number of MFIB entries, the number of (*, G) and (S, G) entries, and the number of MFIB interfaces specified.

The show ipv6 mfib summary command counts all entries, including link-local entries.

Examples

The following example displays summary information about the number of IPv6 MFIB entries and interfaces:

Router# show ipv6 mfib summary
 
IPv6 MFIB summary:
  54     total entries [1 (S,G), 7 (*,G), 46 (*,G/m)]
  17     total MFIB interfaces

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

Table 8 show ipv6 mfib summary Field Descriptions

Field

Description

54 total entries

Total number of MFIB entries, including the number of (*, G) and (S, G) entries.

17 total MFIB interfaces

Sum of all the MFIB interfaces in all the MFIB entries.

show ipv6 mld groups

To display the multicast groups that are directly connected to the router and that were learned through Multicast Listener Discovery (MLD), use the show ipv6 mld groups command in user EXEC or privileged EXEC mode.

show ipv6 mld [ vrf vrf-name ] groups [link-local] [ group-name | group-address ] [ interface-type interface-number ] [ detail | explicit ]

Syntax Description

vrf vrf-name

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

link-local

(Optional) Displays the link-local groups.

group-name | group-address

(Optional) IPv6 address or name of the multicast group.

interface-type interface-number

(Optional) Interface type and number.

detail

(Optional) Displays detailed information about individual sources.

explicit

(Optional) Displays information about the hosts being explicitly tracked on each interface for each group.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

12.3(7)T

The explicit keyword was added.

12.2(25)S

The link-local and explicit keywords were added.

12.4(2)T

Information about MLD state limits was added to the command output.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

If you omit all optional arguments, the show ipv6 mld groups command displays by group address and interface type and number all directly connected multicast groups, including link-local groups (where the link-local keyword is not available) used.

Examples

The following is sample output from the show ipv6 mld groups command. It shows all of the groups joined by Fast Ethernet interface 2/1, including link-local groups used by network protocols.

Router# show ipv6 mld groups FastEthernet 2/1
MLD Connected Group Membership
Group Address          Interface           Uptime        Expires
FF02::2                FastEthernet2/1     3d18h         never
FF02::D                FastEthernet2/1     3d18h         never
FF02::16               FastEthernet2/1     3d18h         never
FF02::1:FF00:1         FastEthernet2/1     3d18h         00:00:27
FF02::1:FF00:79        FastEthernet2/1     3d18h         never
FF02::1:FF23:83C2      FastEthernet2/1     3d18h         00:00:22
FF02::1:FFAF:2C39      FastEthernet2/1     3d18h         never
FF06:7777::1           FastEthernet2/1     3d18h         00:00:26

The following is sample output from the show ipv6 mld groups command using the detail keyword:

Router# show ipv6 mld groups detail 
Interface:      Ethernet2/1/1 
Group:          FF33::1:1:1 
Uptime:         00:00:11 
Router mode:    INCLUDE 
Host mode:      INCLUDE 
Last reporter:  FE80::250:54FF:FE60:3B14 
Group source list: 
Source Address                          Uptime    Expires   Fwd  Flags 
2004:4::6                               00:00:11  00:04:08  Yes  Remote Ac 4 

The following is sample output from the show ipv6 mld groupscommand using the explicit keyword:

Router# show ipv6 mld groups explicit
Ethernet1/0, FF05::1
    Up:00:43:11 EXCLUDE(0/1) Exp:00:03:17
    Host Address                            Uptime   Expires
    FE80::A8BB:CCFF:FE00:800                00:43:11 00:03:17
    Mode:EXCLUDE
Ethernet1/0, FF05::6
    Up:00:42:22 INCLUDE(1/0) Exp:not used
    Host Address                            Uptime   Expires
    FE80::A8BB:CCFF:FE00:800                00:42:22 00:03:17
    Mode:INCLUDE
        300::1
        300::2
        300::3
Ethernet1/0 - Interface
ff05::1 - Group address
Up:Uptime for the group
EXCLUDE/INCLUDE - The mode the group is in on the router.
(0/1) (1/0) - (Number of hosts in INCLUDE mode/Number of hosts in EXCLUDE moe)
Exp:Expiry time for the group.
FE80::A8BB:CCFF:FE00:800 - Host ipv6 address.
00:43:11 - Uptime for the host.
00:03:17 - Expiry time for the host
Mode:INCLUDE/EXCLUDE - Mode the Host is operating in.
300::1, 300::2, 300::3 - Sources that the host has joined in the above specified mode.

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

Table 9 show ipv6 mld groups Field Descriptions

Field

Description

Group Address

Address of the multicast group.

Interface

Interface through which the group is reachable.

Uptime

How long (in hours, minutes, and seconds) this multicast group has been known.

Expires

How long (in hours, minutes, and seconds) until the entry is removed from the MLD groups table.

The expiration timer shows "never" if the router itself has joined the group, and the expiration timer shows "not used" when the router mode of the group is INCLUDE. In this situation, the expiration timers on the source entries are used.

Last reporter:

Last host to report being a member of the multicast group.

Flags Ac 4

Flags counted toward the MLD state limits configured.

Related Commands

Command

Description

ipv6 mld query-interval

Configures the frequency at which the Cisco IOS software sends MLD host-query messages.

show ipv6 mld groups summary

To display the number of (*, G) and (S, G) membership reports present in the Multicast Listener Discovery (MLD) cache, use the show ipv6 mld groups summary command in user EXEC or privileged EXEC mode.

show ipv6 mld groups summary

Syntax Description

This command has no arguments or keywords.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

The show ipv6 mld groups summary command displays the number of directly connected multicast groups (including link-local groups).

Examples

The following is sample output from the show ipv6 mld groups summarycommand:

Router# show ipv6 mld groups summary
MLD Route Summary
  No. of (*,G) routes = 5
  No. of (S,G) routes = 0

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

Table 10 show ipv6 mld groups summary Field Descriptions

Field

Description

No. of (*,G) routes = 5

Displays the number of groups present in the MLD cache.

No. of (S,G) routes = 0

Displays the number of include and exclude mode sources present in the MLD cache.

show ipv6 mld host-proxy

To display IPv6 MLD host proxy information, use the show ipv6 mld host-proxy command in user EXEC or privileged EXEC mode.

show ipv6 mld host-proxy [ interface-type interface-number ] [ group [group-address] ]

Syntax Description

interface-type interface-number

(Optional) Interface type and number.

group

(Optional) Displays a list of group entries for which the specified interface is acting as a proxy interface.

group-address

(Optional) Specified group.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

15.1(2)T

This command was introduced.

Usage Guidelines

The show ipv6 mld host-proxy command displays MLD proxy information. When this command is used with the interface-type interface-numberarguments, interface details such as interface state, IPv6 address, MLD state, etc., are displayed. If an interface is not specified, the show ipv6 mld host-proxy command displays all active proxy interfaces on the router.

The show ipv6 mld host-proxy command when used with the interface-type interface-numberarguments and the group keyword displays information about group entries for which interface is acting as a proxy interface. If the group-address argument is specified, it display the group information for specified group.

Examples

The following example displays IPv6 MLD proxy information for the Ethernet 0/0 interface:

Router# show ipv6 mld host-proxy Ethernet0/0 
Ethernet0/0 is up, line protocol is up
  Internet address is FE80::34/64
MLD is enabled on interface
  MLD querying router is FE80::12, Version: MLDv2
  Current MLD host version is 2
  MLD max query response time is 10 seconds
Number of MLD Query sent on interface : 10
Number of MLD Query received on interface : 20
Number of MLDv1 report sent : 5
Number of MLDv2 report sent : 10
Number of MLDv1 leave sent : 0
Number of MLDv2 leave sent : 1

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

Table 11 show ipv6 mld host-proxy Field Descriptions

Field

Description

Ethernet0/0 is up, line protocol is up

State of the specified interface.

Internet address is FE80::34/64

IPv6 address of the specified interface.

MLD is enabled on interface

State of MLD on the interface, whether enabled or disabled.

MLD querying router is FE80::12, Version: MLDv2

IPv6 address and MLD version of the querying router.

Current MLD host version is 2

Configured MLD host version.

MLD max query response time is 10 seconds

Maximum allowed response time for the query.

Number of MLD Query sent on interface: 10

Number of MLD queries sent from the interface.

Number of MLD Query received on interface: 20

Number of MLD queries received on the interface.

Number of MLDv1 report sent : 5

Number of MLDv1 membership reports sent.

Number of MLDv2 report sent : 10

Number of MLDv2 membership reports sent.

Number of MLDv1 leave sent : 0

Number of MLDv1 leave reports sent.

Number of MLDv2 leave sent : 1

Number of MLDv2 leave reports sent.

The following example provides information about a group entry for the Ethernet 0/0 proxy interface:

Router# show ipv6 mld host-proxy Ethernet0/0 group
Group:               FF5E::12
Uptime:             00:00:07
Group mode:     INCLUDE
Version             MLDv2
Group source list:
  Source Address        Uptime    
            5000::2                     00:00:07  
            2000::2                     00:01:15
Group:               FF7E::21
Uptime:             00:02:07
Group mode:     EXCLUDE
Version              MLDv2
Group source list: Empty

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

Table 12 show ipv6 mld host-proxy Field Descriptions

Field

Description

Group: FF5E::12

The IPv6 address of the group.

Uptime: 00:00:07

The length of time the group has been active.

Group mode: INCLUDE

The group mode.

Version MLDv2

The MLD version on the proxy interface.

Group source list:

Information on the group source list.

Related Commands

Command

Description

ipv6 mld host-proxy

Enables the MLD proxy feature.

ipv6 mld host-proxy interface

Enables the MLD proxy feature on a specified interface on an RP.

show ipv6 mld interface

To display multicast-related information about an interface, use the show ipv6 mld interface command in user EXEC or privileged EXEC mode.

show ipv6 mld [ vrf vrf-name ] interface [ type number ]

Syntax Description

vrf vrf-name

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

type number

(Optional) Interface type and number.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)S.

12.4(2)T

Information about MLD state limits was added to the command output.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

If you omit the optional type and number arguments, the show ipv6 mld interface command displays information about all interfaces.

Examples

The following is sample output from the show ipv6 mld interface command for Ethernet interface 2/1/1:

Router# show ipv6 mld interface Ethernet 2/1/1 
Global State Limit : 2 active out of 2 max
Loopback0 is administratively down, line protocol is down
  Internet address is ::/0
. 
. 
. 
Ethernet2/1/1 is up, line protocol is up 
  Internet address is FE80::260:3EFF:FE86:5649/10 
  MLD is enabled on interface 
  Current MLD version is 2 
  MLD query interval is 125 seconds 
  MLD querier timeout is 255 seconds 
  MLD max query response time is 10 seconds 
  Last member query response interval is 1 seconds 
  Interface State Limit : 2 active out of 3 max 
  State Limit permit access list:
  MLD activity: 83 joins, 63 leaves
  MLD querying router is FE80::260:3EFF:FE86:5649 (this system)

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

Table 13 show ipv6 mld interface Field Descriptions

Field

Description

Global State Limit: 2 active out of 2 max

Two globally configured MLD states are active.

Ethernet2/1/1 is up, line protocol is up

Interface type, number, and status.

Internet address is...

Internet address of the interface and subnet mask being applied to the interface.

MLD is enabled in interface

Indicates whether Multicast Listener Discovery (MLD) has been enabled on the interface with the ipv6 multicast-routingcommand.

Current MLD version is 2

The current MLD version.

MLD query interval is 125 seconds

Interval (in seconds) at which the Cisco IOS software sends MLD query messages, as specified with the ipv6 mld query-intervalcommand.

MLD querier timeout is 255 seconds

The length of time (in seconds) before the router takes over as the querier for the interface, as specified with the ipv6 mld query-timeoutcommand.

MLD max query response time is 10 seconds

The length of time (in seconds) that hosts have to answer an MLD Query message before the router deletes their group, as specified with the ipv6 mld query-max-response-time command.

Last member query response interval is 1 seconds

Used to calculate the maximum response code inserted in group and source-specific query. Also used to tune the "leave latency" of the link. A lower value results in reduced time to detect the last member leaving the group.

Interface State Limit : 2 active out of 3 max

Two out of three configured interface states are active.

State Limit permit access list: change

Activity for the state permit access list.

MLD activity: 83 joins, 63 leaves

Number of groups joins and leaves that have been received.

MLD querying router is FE80::260:3EFF:FE86:5649 (this system)

IPv6 address of the querying router.

Related Commands

Command

Description

ipv6 mld join-group

Configures MLD reporting for a specified group and source.

ipv6 mld query-interval

Configures the frequency at which the Cisco IOS software sends MLD host-query messages.

show ipv6 mld snooping

To display Multicast Listener Discovery version 2 (MLDv2) snooping information, use the show ipv6 mld snooping command in privileged EXEC mode.

show ipv6 mld [ vrf vrf-name ] snooping { explicit-tracking vlan vlan | mrouter [ vlan vlan ] | report-suppression vlan vlan | statistics vlan vlan }

Syntax Description

vrf vrf-name

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

explicit-tracking vlan vlan

Displays the status of explicit host tracking.

mrouter

Displays the multicast router interfaces on an optional VLAN.

vlan vlan

(Optional) Specifies the VLAN number on the multicast router interfaces.

report-suppression vlan vlan

Displays the status of the report suppression.

statistics vlan vlan

Displays MLD snooping information on a VLAN.

Command Default

This command has no default settings.

Command Modes


Privileged EXEC

Command History

Release

Modification

12.2(18)SXE

This command was introduced on the Supervisor Engine 720.

12.2(33)SRA

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

15.1(4)M

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.

15.4(2)S

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

Usage Guidelines

You can enter the show ipv6 mld snooping mrouter command without arguments to display all the multicast router interfaces.

Examples

This example shows how to display explicit tracking information on VLAN 25:

Router# show ipv6 mld snooping explicit-tracking vlan 25 
Source/Group                    Interface    Reporter        Filter_mode
------------------------------------------------------------------------
10.1.1.1/226.2.2.2              Vl25:1/2     10.27.2.3       INCLUDE    
10.2.2.2/226.2.2.2              Vl25:1/2     10.27.2.3       INCLUDE 

This example shows how to display the multicast router interfaces in VLAN 1:

Router# show 
ipv6 mld snooping mrouter vlan 1
vlan            ports
-----+----------------------------------------
  1          Gi1/1,Gi2/1,Fa3/48,Router

This example shows the MLD snooping statistics information for VLAN 25:

Router# show ipv6 mld
 snooping statistics interface vlan 25
Snooping staticstics for Vlan25
#channels:2
#hosts   :1
 
Source/Group            Interface       Reporter      Uptime        Last-Join   Last-Leave
10.1.1.1/226.2.2.2      Gi1/2:Vl25      10.27.2.3     00:01:47      00:00:50      -     
10.2.2.2/226.2.2.2      Gi1/2:Vl25      10.27.2.3     00:01:47      00:00:50      - 

Related Commands

Command

Description

ipv6 mld snooping

Enables MLDv2 snooping globally.

ipv6 mld snooping explicit-tracking

Enables explicit host tracking.

ipv6 mld snooping querier

Enables the MLDv2 snooping querier.

ipv6 mld snooping report-suppression

Enables report suppression on a VLAN.

show ipv6 mld ssm-map

To display Source Specific Multicast (SSM) mapping information, use the show ipv6 mld ssm-map staticcommand in user EXEC or privileged EXEC mode.

show ipv6 mld [ vrf vrf-name ] ssm-map [source-address]

Syntax Description

vrf vrf-name

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

source-address

(Optional) Source address associated with an MLD membership for a group identified by the access list.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.2(18)SXE

This command was introduced.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Usage Guidelines

If the optional source-address argument is not used, all SSM mapping information is displayed.

Examples

The following example shows all SSM mappings for the router:

Router# show ipv6 mld ssm-map
SSM Mapping  : Enabled
DNS Lookup   : Enabled

The following examples show SSM mapping for the source address 2001:0DB8::1:

Router# show ipv6 mld ssm-map 2001:0DB8::1
 Group address  : 2001:0DB8::1
 Group mode ssm : TRUE
 Database       : STATIC
 Source list    : 2001:0DB8::2
                  2001:0DB8::3
Router# show ipv6 mld ssm-map 2001:0DB8::2
 Group address  : 2001:0DB8::2
 Group mode ssm : TRUE
 Database       : DNS
 Source list    : 2001:0DB8::3
                  2001:0DB8::1

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

Table 14 show ipv6 mld ssm-map Field Descriptions

Field

Description

SSM Mapping

The SSM mapping feature is enabled.

DNS Lookup

The DNS lookup feature is automatically enabled when the SSM mapping feature is enabled.

Group address

Group address identified by a specific access list.

Group mode ssm : TRUE

The identified group is functioning in SSM mode.

Database : STATIC

The router is configured to determine source addresses by checking static SSM mapping configurations.

Database : DNS

The router is configured to determine source addresses using DNS-based SSM mapping.

Source list

Source address associated with a group identified by the access list.

Related Commands

Command

Description

debug ipv6 mld ssm-map

Displays debug messages for SSM mapping.

ipv6 mld ssm-map enable

Enables the SSM mapping feature for groups in the configured SSM range

ipv6 mld ssm-map query dns

Enables DNS-based SSM mapping.

ipv6 mld ssm-map static

Configures static SSM mappings.

show ipv6 mld traffic

To display the Multicast Listener Discovery (MLD) traffic counters, use the show ipv6 mld traffic command in user EXEC or privileged EXEC mode.

show ipv6 mld [ vrf vrf-name ] traffic

Syntax Description

vrf vrf-name

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

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(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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

Use the show ipv6 mld trafficcommandto check if the expected number of MLD protocol messages have been received and sent.

Examples

The following example displays the MLD protocol messages received and sent.

Router# show ipv6 mld traffic
 
MLD Traffic Counters
Elapsed time since counters cleared:00:00:21
                              Received     Sent
Valid MLD Packets               3           1         
Queries                         1           0         
Reports                         2           1         
Leaves                          0           0         
Mtrace packets                  0           0         
Errors:
Malformed Packets                           0         
Bad Checksums                               0         
Martian source                              0         
Packets Received on MLD-disabled Interface  0 

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

Table 15 show ipv6 mld traffic Field Descriptions

Field

Description

Elapsed time since counters cleared

Indicates the amount of time (in hours, minutes, and seconds) since the counters cleared.

Valid MLD packets

Number of valid MLD packets received and sent.

Queries

Number of valid queries received and sent.

Reports

Number of valid reports received and sent.

Leaves

Number of valid leaves received and sent.

Mtrace packets

Number of multicast trace packets received and sent.

Errors

Types of errors and the number of errors that have occurred.

show ipv6 mobile binding

To display information about the binding cache, use the show ipv6 mobile binding command in user EXEC or privileged EXEC mode.

show ipv6 mobile binding [ care-of-address address | home-address address | interface-type interface-number ]

Syntax Description

care-of-address

(Optional) Provides information about the mobile node’s current location.

address

(Optional) Current address of the mobile node.

home-address

(Optional) IPv6 address is assigned to the mobile node within its home subnet prefix on its home link.

interface-type interface-number

(Optional) Interface type and number.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(14)T

This command was introduced.

12.4(11)T

Command output was updated to display the tunnel interface and the tunnel end point details.

Usage Guidelines

The show ipv6 mobile binding command displays details of all bindings that match all search criteria. If no optional keywords or arguments are specified, all bindings are displayed.

Examples

The following example displays information about the binding cache:

Router# show ipv6 mobile binding
Mobile IPv6 Binding Cache Entries:
  2001:1::8
    via care-of address 2001:2::1
    home-agent 2001:1::2
    state ACTIVE, sequence 1, flags AHrlK
    lifetime:remaining 1023 (secs), granted 1024 (secs), requested 1024 (secs)
    interface Ethernet1/3
    0 tunneled, 0 reversed tunneled
Selection matched 1 bindings

The following example displays information about the tunnel interface and the tunnel end point details:

Router# show ipv6 mobile bindings 
Tunnel Interface: tunnel0 
Tunnel Source 2001:0DB1:1:1
Tunnel Destination: 2001:0DB1:2:1
Input: 20 packets, 1200 bytes, 0 drops
Output: 20 packets, 1200 bytes, 0 drops

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

Table 16 show ipv6 mobile binding Field Descriptions

Field

Description

2001:1::8

Home IPv6 address of the mobile node.

via care-of address 2001:2::1

Care-of address of the mobile node.

home-agent 2001:1::2

Home-agent address

state ACTIVE, sequence 1, flags AHrlK

  • State: State of the mobile binding.
  • Sequence number.
  • Flags: Services requested by mobile node. The mobile node requests these services by setting bits in the registration request. Uppercase characters denote bit set.

lifetime:remaining 1023 (secs), granted 1024 (secs), requested 1024 (secs)

  • Remaining: The time remaining until the registration is expired. It has the same initial value as lifetime granted, and is counted down by the home agent.
  • Granted: The lifetime granted to the mobile node for this registration. Number of seconds in parentheses.
  • Requested: The lifetime requested by the mobile node for this registration. Number of seconds in parentheses.

interface Ethernet1/3

The interface being used.

0 tunneled, 0 reversed tunneled

Number of bindings tunneled and reverse tunneled.

Selection matched 1 bindings

Total number of mobility bindings that were matched.

Tunnel Interface

The tunnel interface being used.

Tunnel Source

Tunnel source IPv6 address.

Tunnel Destionation

Tunnel destination IPv6 address.

Input

Number of packets in.

Output

Number of packets out.

Related Commands

binding

Configures binding options for the Mobile IPv6 home agent feature in home-agent configuration mode.

ipv6 mobile home-agent (interface configuration)

Initializes and starts the Mobile IPv6 home agent on a specific interface.

show ipv6 mobile globals

To display global Mobile IPv6 parameters, use the show ipv6 mobile globalscommand in user EXEC or privileged EXEC mode.

show ipv6 mobile globals

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.

12.4(11)T

Command output was updated to show the Mobile IPv6 tunnel information on the home agent.

Usage Guidelines

The show ipv6 mobile globals command displays the values of all global configuration parameters associated with Mobile IPv6 and lists the interfaces on which home agent functionality is operating.

Examples

In the following example, the show ipv6 mobile globals command displays the binding parameters:

Router# show ipv6 mobile globals
 
Mobile IPv6 Global Settings:
  1 Home Agent service on following interfaces:
    Ethernet1/2
  Bindings:
    Maximum number is unlimited.
    1 bindings are in use
    1 bindings peak
    Binding lifetime permitted is 262140 seconds
    Recommended refresh time is 300 seconds

In the following example, the show ipv6 mobile globals command displays the Mobile IPv6 tunnel information parameters on the home agent:

Router# show ipv6 mobile globals 
Tunnel Encapsulation Mode: IPv6/IPv6
ICMP Unreachable for tunnel interfaces <enabled/disabled>
Tunnel Path MTU Discovery: <enabled/disabled>

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

Table 17 show ipv6 mobile globals Field Descriptions

Field

Description

1 Home Agent service on following interfaces: Ethernet1/2

Interface on which the home agent service is enabled.

Bindings:

Information on bindings.

Maximum number is unlimited.

The amount of bindings allowed on the home agent.

1 bindings are in use.

How many bindings are being used.

1 bindings peak

The maximum number of bindings that have been used in this session.

Binding lifetime permitted is 262140 seconds

The configured binding lifetime.

Recommended refresh time is 300 seconds

The configured refresh time.

Tunnel Encapsulation Mode:

Tunnel encapsulation type.

ICMP Unreachable for tunnel interfaces

Enabled or disabled.

Tunnel Path MTU Discovery:

Enabled or disabled.

Related Commands

Command

Description

address (IPv6 mobile router)

Specifies the home address of the IPv6 mobile node.

binding

Configures binding options for the Mobile IPv6 home agent feature in home agent configuration mode.

ipv6 mobile home-agent (global configuration)

Enters home agent configuration mode.

host group

Creates a host configuration in Mobile IPv6.

show ipv6 mobile home-agents

To display local and discovered neighboring home agents, use the show ipv6 mobile home-agentscommand in user EXEC or privileged EXEC mode.

show ipv6 mobile home-agents [ interface-type interface-number [prefix] ]

Syntax Description

interface-type interface-number

(Optional) Interface type and number.

prefix

(Optional) IPv6 address prefix of the care-of address or the home address of neighboring agents.

Command Modes


User EXEC (>)
Privileged EXEC (#)

Command History

Release

Modification

12.3(14)T

This command was introduced.

Usage Guidelines

The show ipv6 mobile home-agentscommand displays information about local and discovered neighboring home agents. You can choose to display information on a specified interface using the optional interface-type and interface-number arguments, and you can further choose to display only those addresses that match the optional prefix argument.

If no argument or keyword is entered, the home agent list for each interface on which the router is acting as a home agent is displayed. Each list is displayed in decreasing order of preference.

Examples

In the following example, the fact that no neighboring mobile home agents were found is displayed:

Router# show ipv6 mobile home-agents
Home Agent information for Ethernet1/3
  Configured:
    FE80::20B:BFFF:FE33:501F
    preference 0 lifetime 1800
      global address 2001:0DB8:1::2/64
  Discovered Home Agents:
    FE80::4, last update 0 min
    preference 0 lifetime 1800
      global address 2001:0DB8:1::4/64

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

Table 18 show ipv6 mobile home-agents Field Descriptions

Field

Description

Home Agent information for Ethernet1/3

The interface on which the home agent is configured.

Configured: FE80::20B:BFFF:FE33:501F

The IPv6 address on which the home agent is configured.

preference 0 lifetime 1800

The configured home agent preference and lifetime.

global address 2001:0DB8:1::2/64

The configured global address.

Discovered Home Agents:

FE80::4, last update 0 min

preference 0 lifetime 1800

global address 2001:0DB8:1::4/64

The address and configuration information about discovered home agents.

Related Commands

Command

Description

binding

Configures binding options for the Mobile IPv6 home agent feature in home agent configuration mode.

show ipv6 mobile host groups

To display information about IPv6 mobile host groups, use the show ipv6 mobile host groupscommand in user EXEC or privileged EXEC mode.

show ipv6 mobile host groups [profile-name]

Syntax Description

profile-name

(Optional) Host group profile name.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.4(11)T

This command was introduced.

Usage Guidelines

The show ipv6 mobile host groupscommand lists the configuration of all configured host groups. To display information about a specific host group, use the optional profile-name keyword.

Examples

In the following example, information about a host group named localhost is displayed:

Router# show ipv6 mobile host groups
Mobile IPv6 Host Configuration
Mobile Host List:
Host Group Name: localhost
    NAI: sai@cisco.com
    Address: CAB:C0:CA5A:CA5A::CA5A
    Security Association Entry:
      SPI: (Hex: 501) (Decimal Int: 1281)
      Key Format: Hex    Key: baba
      Algorithm: HMAC_SHA1
      Replay Protection: On    Replay Window: 6 secs

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

Table 19 show ipv6 mobile host groups Field Descriptions

Field

Description

Host Group Name: localhost

Configuration information about the host group named localhost to follow.

NAI: sai@cisco.com

Network access identifier (NAI) for localhost host group.

Address: 2001:0DB8:CA5A:CA5A::CA5A

IPv6 address for localhost host group.

Security Association Entry:

Security association for the host group named localhost to follow.

SPI: (Hex: 501) (Decimal Int: 1281)

SPI for localhost.

Key Format: Hex Key: baba

Key format and name for localhost.

Algorithm: HMAC_SHA1

Authentication algorithm.

Replay Protection: On Replay Window: 6 secs

Replay protection is activated, and the number of seconds that the router uses for replay protection is 6.

Related Commands

Command

Description

address (Mobile IPv6)

Specifies the home address of the IPv6 mobile node.

authentication (Mobile IPv6)

Specifies the authentication properties for the IPv6 mobile node by creating either a unidirectional or bidirectional SPI.

host group

Creates a host group configuration in IPv6 Mobile.

nai

Specifies the NAI for the IPv6 mobile node.

show ipv6 mobile globals

Displays global Mobile IPv6 parameters.

show ipv6 mobile router

To display configuration information and monitoring statistics about the IPv6 mobile router, use the show ipv6 mobile routercommand in user EXEC or privileged EXEC mode.

show ipv6 mobile router [ running-config | status ]

Syntax Description

running-config

(Optional) Displays IPv6 mobile router running configuration information.

status

(Optional) Displays IPv6 mobile router status information.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.4(20)T

This command was introduced.

Usage Guidelines

The show ipv6 mobile routerdisplay includes the mobile router configuration information such as the home address and network mask, home agent, and registration settings, and operational information such as status, tunnel interface, active foreign agent, and care-of address.

Examples

The following is sample output from the show ipv6 mobile router command:

Router# show ipv6 mobile router
 
Mobile Reverse Tunnel established
---------------------------------
using Nemo Basic mode
Home Agent: 2001:DB8:2000::2001
CareOf Address: 2001:DB8::A8BB:CCFF:FE01:F611
Attachment Router: FE80::A8BB:CCFF:FE01:F511 
Attachment Interface: Ethernet1/1
Home Network: 2001:DB8:2000:0:FDFF:FFFF:FFFF:FFFE/64
Home Address: 2001:DB8:2000::1111

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

Table 20 show ipv6 mobile router Field Descriptions

Field

Description

Mobile Reverse Tunnel established

If reverse tunnel is enabled or disabled, this information is displayed or absent, respectively.

using Nemo Basic mode

Type of mode being used by the mobile router.

Home Agent:

Home agent with which the mobile router registers. The mobile router registers only to the home agent with the highest priority when multiple addresses are configured.

CareOf Address:

Care-of address used by the registered mobile router.

Attachment Router:

Attachment point in the foreign network.

Attachment Interface:

Attachment interface used in the foreign network.

Home Network:

IPv6 address of the mobile router home network.

Home Address:

IPv6 address of the mobile router.

show ipv6 mobile traffic

To display information about binding updates received and binding acknowledgments sent, use the show ipv6 mobile trafficcommand in user EXEC or privileged EXEC mode.

show ipv6 mobile traffic

Syntax Description

The command has no arguments or keywords.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(14)T

This command was introduced.

12.2(33)SRA

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

Usage Guidelines

The show ipv6 mobile traffic command displays counters and other information associated with Mobile IPv6. The following counters are maintained globally across all interfaces:

  • Dynamic home agent discovery requests received
  • Binding updates received
  • Home agent registrations received
  • Successful home agent registrations
  • Home agent deregistrations (lifetime of zero or care-of address equals home address)
  • Home agent registrations rejected, defined in the status as sent in the binding acknowledgment with a separate counter for every reason code defined in the table below, and generated by the implementation
  • Time of last registration acceptance
  • Time of last registration denial
  • Status code for last registration denial
  • Binding updates discarded through rate limiting
  • Binding acknowledgments discarded through rate limiting
  • Binding cache high-water mark, maintained and displayed for registrations

The table below shows possible binding status values and reasons for use of these values.

Table 21 show ipv6 mobile traffic Field Descriptions

Reason Code

Binding Status Value

0

Binding update accepted

128

Reason unspecified

129

Administratively prohibited

130

Insufficient resources

131

Home registration not supported

132

Not home subnet

133

Not home agent for this mobile node

134

Duplicate address detection (DAD) failed

135

Sequence number out of window

Examples

In the following example, information about IPv6 Mobile traffic is displayed:

Router# show ipv6 mobile traffic
 
MIPv6 statistics:
  Rcvd: 6477 total
      0 truncated, 0 format errors
      0 checksum errors
    Binding Updates received:6477
      0 no HA option, 0 BU's length
      0 options' length, 0 invalid CoA
  Sent: 6477 generated
    Binding Acknowledgements sent:6477
      6477 accepted (0 prefix discovery required)
      0 reason unspecified, 0 admin prohibited
      0 insufficient resources, 0 home reg not supported
      0 not home subnet, 0 not home agent for node
      0 DAD failed, 0 sequence number
    Binding Errors sent:0
      0 no binding, 0 unknown MH
  Home Agent Traffic:
    6477 registrations, 0 deregistrations
    00:00:23 since last accepted HA registration
    unknown time since last failed HA registration
    unknown last failed registration code
    Traffic forwarded:
      0 tunneled, 0 reversed tunneled
    Dynamic Home Agent Address Discovery:
      1 requests received, 1 replies sent
    Mobile Prefix Discovery:
      0 solicitations received, 0 advertisements sent

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

Table 22 show ipv6 mobile traffic Field Descriptions

Field

Description

MIPv6 statistics:

Information about binding updates received by the mobility agent.

Sent:

Information about binding acknowledgments sent by the mobility agent.

Binding Errors sent:

Information about binding errors sent by the mobility agent.

Home Agent Traffic: 6477 registrations, 0 deregistrations

Number of registrations and deregistrations accepted by the home agent.

00:00:23 since last accepted HA registration

Length of time since the last registration was accepted by the home agent.

unknown time since last failed HA registration

Length of time since the last failed registration by the home agent.

unknown last failed registration code

Reason why the registration failed, if it did fail.

Dynamic Home Agent Address Discovery:

Number of dynamic home agent discovery requests received and replies sent.

Mobile Prefix Discovery:

Number of mobile prefix discovery solicitations received and advertisements sent by the home agent.

Related Commands

Command

Description

binding

Configures binding options for the Mobile IPv6 home agent feature in home agent configuration mode.

show ipv6 mobile tunnels

To list the Mobile IPv6 tunnels on the home agent, use the show ipv6 mobile tunnelscommand in user EXEC or privileged EXEC mode.

show ipv6 mobile tunnels [ summary | tunnel if-number ]

Syntax Description

tunnel if-number

(Optional) Tunnel interface.

summary

(Optional) Summary of tunnels on the home agent.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.4(11)T

This command was introduced.

Usage Guidelines

The show ipv6 mobile tunnels command displays active tunnels on the Mobile IPv6 home agent. Use the summary keyword to view a summary of all tunnels on the home agent, or the tunnelif-number keyword and argument to view information on a specific tunnel.

Examples

The following example displays information about the Mobile IPv6 tunnels on the home agent:

Router# show ipv6 mobile tunnels
Tunnel1:
 Source: 2001:0DB1:1:1  
 Destination: 2001:0DB1:2:1
 Encapsulation Mode: IPv6/IPv6
 Egress Interface: Ethernet 1/0
 Switching Mode: Process
 Keep-Alive: Not Supported
 Path MTU Discovery: Enabled 
 Input: 20 packets, 1200 bytes, 0 drops
 Output: 20 packets, 1200 bytes, 0 drops   
 NEMO Options: Not Supported

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

Table 23 show ipv6 mobile tunnels Field Descriptions

Field

Description

Source:

Source IPv6 tunnel address.

Destination:

Destination IPv6 tunnel address.

Encapsulation Mode:

Tunnel encapsulation type.

Egress interface:

Interface used for egress (outgoing packets).

Switching mode:

Type of switching mode used.

Keep-alive:

Supported or not supported.

Path MTU Discovery:

Enabled or disabled.

Input:

Number of packets in.

Output:

Number of packets out.

NEMO Options:

Supported or not supported.

Related Commands

Command

Description

show ipv6 mobile home-agent

Displays local and discovered neighboring home agents.

show ipv6 mrib client

To display information about the clients of the Multicast Routing Information Base (MRIB), use the show ipv6 mrib client command in user EXEC or privileged EXEC mode.

show ipv6 mrib [ vrf vrf-name ] client [filter] [ name { client-name | client-name : client-id } ]

Syntax Description

vrf vrf-name

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

filter

(Optional) Displays information about MRIB flags that each client owns and that each client is interested in.

name

(Optional) The name of a multicast routing protocol that acts as a client of MRIB, such as Multicast Listener Discovery (MLD) and Protocol Independent Multicast (PIM).

client-name : client-id

The name and ID of a multicast routing protocol that acts as a client of MRIB, such as MLD and PIM. The colon is required.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)S.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

Use the filter keyword to display information about the MRIB flags each client owns and the flags in which each client is interested.

Examples

The following is sample output from the show ipv6 mrib clientcommand:

Router# show ipv6 mrib client
IP MRIB client-connections
igmp:145        (connection id 0)
pim:146 (connection id 1)
mfib ipv6:3     (connection id 2)
slot 3  mfib ipv6 rp agent:16   (connection id 3)
slot 1  mfib ipv6 rp agent:16   (connection id 4)
slot 0  mfib ipv6 rp agent:16   (connection id 5)
slot 4  mfib ipv6 rp agent:16   (connection id 6)
slot 2  mfib ipv6 rp agent:16   (connection id 7)

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

Table 24 show ipv6 mrib client Field Descriptions

Field

Description

igmp:145 (connection id 0) pim:146 (connection id 1) mfib ipv6:3 (connection id 2) mfib ipv6 rp agent:16 (connection id 3)

Client ID (client name:process ID)

show ipv6 mrib route

To display Multicast Routing Information Base (MRIB) route information, use the show ipv6 mrib route command in user EXEC or privileged EXEC mode.

show ipv6 mrib [ vrf vrf-name ] route [ link-local | summary | [ sourceaddress-or-name | * ] [ groupname-or-address [prefix-length] ] ]

Syntax Description

vrf vrf-name

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

link-local

(Optional) Displays the link-local groups.

summary

(Optional) Displays the number of MRIB entries (including link-local groups) and interfaces present in the MRIB table.

sourceaddress-or-name

(Optional) IPv6 address or name of the source.

*

(Optional) Displays all MRIB route information.

groupname or-address

(Optional) IPv6 address or name of the multicast group.

prefix-length

(Optional) IPv6 prefix length.

Command Modes


User EXEC (>)
Privileged EXEC (#)

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

All entries are created by various clients of the MRIB, such as Multicast Listener Discovery (MLD), Protocol Independent Multicast (PIM), and Multicast Forwarding Information Base (MFIB). The flags on each entry or interface serve as a communication mechanism between various clients of the MRIB. The entries reveal how PIM sends register messages for new sources and the action taken.

The summary keyword shows the count of all entries, including link-local entries.

The interface flags are described in the table below.

Table 25 Description of Interface Flags

Flag

Description

F

Forward--Data is forwarded out of this interface

A

Accept--Data received on this interface is accepted for forwarding

IC

Internal copy

NS

Negate signal

DP

Do not preserve

SP

Signal present

II

Internal interest

ID

Internal uninterest

LI

Local interest

LD

Local uninterest

C

Perform directly connected check

Special entries in the MRIB indicate exceptions from the normal behavior. For example, no signaling or notification is necessary for arriving data packets that match any of the special group ranges. The special group ranges are as follows:

  • Undefined scope (FFX0::/16)
  • Node local groups (FFX1::/16)
  • Link-local groups (FFX2::/16)
  • Source Specific Multicast (SSM) groups (FF3X::/32).

For all the remaining (usually sparse-mode) IPv6 multicast groups, a directly connected check is performed and the PIM notified if a directly connected source arrives. This procedure is how PIM sends register messages for new sources.

Examples

The following is sample output from the show ipv6 mrib routecommand using the summary keyword:

Router# show ipv6 mrib route summary
MRIB Route-DB Summary 
  No. of (*,G) routes = 52
  No. of (S,G) routes = 0
  No. of Route x Interfaces (RxI) = 10

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

Table 26 show ipv6 mrib route Field Descriptions

Field

Description

No. of (*, G) routes

Number of shared tree routes in the MRIB.

No. of (S, G) routes

Number of source tree routes in the MRIB.

No. of Route x Interfaces (RxI)

Sum of all the interfaces on each MRIB route entry.

show ipv6 mroute

To display the information in the PIM topology table in a format similar to the show ip mroute command, use the show ipv6 mroute command in user EXEC or privileged EXEC mode.

show ipv6 mroute [ vrf vrf-name ] [ link-local | [ group-name | group-address [ source-address | source-name ] ] ] [summary] [count]

Syntax Description

vrf vrf-name

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

link-local

(Optional) Displays the link-local groups.

group-name | group-address

(Optional) IPv6 address or name of the multicast group.

source-address | source-name

(Optional) IPv6 address or name of the source.

summary

(Optional) Displays a one-line, abbreviated summary of each entry in the IPv6 multicast routing table.

count

(Optional) Displays statistics from the Multicast Forwarding Information Base (MFIB) about the group and source, including number of packets, packets per second, average packet size, and bytes per second.

Command Default

The show ipv6 mroute command displays all groups and sources.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

12.2(25)S

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

15.0(2)SE

This command was integrated into Cisco IOS Release 15.0(2)SE.

15.4(1)S

This command was implemented on the Cisco ASR 901 series routers.

Usage Guidelines

The IPv6 multicast implementation does not have a separate mroute table. For this reason, the show ipv6 mroute command enables you to display the information in the PIM topology table in a format similar to the show ip mroute command.

If you omit all optional arguments and keywords, the show ipv6 mroute command displays all the entries in the PIM topology table (except link-local groups where the link-local keyword is available).

The Cisco IOS software populates the PIM topology table by creating (S,G) and (*,G) entries based on PIM protocol messages, MLD reports, and traffic. The asterisk (*) refers to all source addresses, the "S" refers to a single source address, and the "G" is the destination multicast group address. In creating (S, G) entries, the software uses the best path to that destination group found in the unicast routing table (that is, through Reverse Path Forwarding [RPF]).

Use the show ipv6 mroutecommand to display the forwarding status of each IPv6 multicast route.

Examples

The following is sample output from the show ipv6 mroutecommand:

Router# show ipv6 mroute ff07::1
Multicast Routing Table
Flags:D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, 
       C - Connected, L - Local, I - Received Source Specific Host Report,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT 
Timers:Uptime/Expires
Interface state:Interface, State
(*, FF07::1), 00:04:45/00:02:47, RP 2001:0DB8:6::6, flags:S
  Incoming interface:Tunnel5
  RPF nbr:6:6:6::6
  Outgoing interface list:
    POS4/0, Forward, 00:04:45/00:02:47
(2001:0DB8:999::99, FF07::1), 00:02:06/00:01:23, flags:SFT
  Incoming interface:POS1/0
  RPF nbr:2001:0DB8:999::99
  Outgoing interface list:
    POS4/0, Forward, 00:02:06/00:03:27

The following is sample output from the show ipv6 mroutecommand with the summarykeyword:

Router# show ipv6 mroute ff07::1 summary
Multicast Routing Table
Flags:D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, 
       C - Connected, L - Local, I - Received Source Specific Host Report,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT 
Timers:Uptime/Expires
Interface state:Interface, State
(*, FF07::1), 00:04:55/00:02:36, RP 2001:0DB8:6::6, OIF count:1, flags:S
(2001:0DB8:999::99, FF07::1), 00:02:17/00:01:12, OIF count:1, flags:SFT

The following is sample output from the show ipv6 mroutecommand with the countkeyword:

Router# show ipv6 mroute ff07::1 count
IP Multicast Statistics
71 routes, 24 groups, 0.04 average sources per group
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per second
Other counts:Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group:FF07::1
  RP-tree:
   RP Forwarding:0/0/0/0, Other:0/0/0
   LC Forwarding:0/0/0/0, Other:0/0/0
  Source:2001:0DB8:999::99,
   RP Forwarding:0/0/0/0, Other:0/0/0
   LC Forwarding:0/0/0/0, Other:0/0/0
   HW Forwd:  20000/0/92/0, Other:0/0/0
  Tot. shown:Source count:1, pkt count:20000

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

Table 27 show ipv6 mroute Field Descriptions

Field

Description

Flags:

Provides information about the entry.

  • S--sparse. Entry is operating in sparse mode.
  • s--SSM group. Indicates that a multicast group is within the SSM range of IP addresses. This flag is reset if the SSM range changes.
  • C--connected. A member of the multicast group is present on the directly connected interface.
  • L--local. The router itself is a member of the multicast group.
  • I--received source specific host report. Indicates that an (S, G) entry was created by an (S, G) report. This flag is set only on the designated router (DR).
  • P--pruned. Route has been pruned. The Cisco IOS software keeps this information so that a downstream member can join the source.
  • R--RP-bit set. Indicates that the (S, G) entry is pointing toward the RP. This is typically prune state along the shared tree for a particular source.
  • F--register flag. Indicates that the software is registering for a multicast source.
  • T--SPT-bit set. Indicates that packets have been received on the shortest path source tree.

  • J--join SPT. For (*, G) entries, indicates that the rate of traffic flowing down the shared tree is exceeding the SPT-Threshold value set for the group. (The default SPT-Threshold setting is 0 kbps.) When the J - Join shortest path tree (SPT) flag is set, the next (S, G) packet received down the shared tree triggers an (S, G) join in the direction of the source, thereby causing the router to join the source tree.
The default SPT-Threshold value of 0 kbps is used for the group, and the J - Join SPT flag is always set on (*, G) entries and is never cleared. The router immediately switches to the shortest path source tree when traffic from a new source is received.

Timers: Uptime/Expires

"Uptime" indicates per interface how long (in hours, minutes, and seconds) the entry has been in the IPv6 multicast routing table. "Expires" indicates per interface how long (in hours, minutes, and seconds) until the entry will be removed from the IPv6 multicast routing table.

Interface state:

Indicates the state of the incoming or outgoing interface.

  • Interface. Indicates the type and number of the interface listed in the incoming or outgoing interface list.
  • Next-Hop. "Next-Hop" specifies the IP address of the downstream neighbor.
  • State/Mode. "State" indicates that packets will either be forwarded, pruned, or null on the interface depending on whether there are restrictions due to access lists. "Mode" indicates that the interface is operating in sparse mode.

(*, FF07::1) and (2001:0DB8:999::99)

Entry in the IPv6 multicast routing table. The entry consists of the IPv6 address of the source router followed by the IPv6 address of the multicast group. An asterisk (*) in place of the source router indicates all sources.

Entries in the first format are referred to as (*, G) or "star comma G" entries. Entries in the second format are referred to as (S, G) or "S comma G" entries; (*, G) entries are used to build (S, G) entries.

RP

Address of the RP router.

flags:

Information set by the MRIB clients on this MRIB entry.

Incoming interface:

Expected interface for a multicast packet from the source. If the packet is not received on this interface, it is discarded.

RPF nbr

IP address of the upstream router to the RP or source.

Outgoing interface list:

Interfaces through which packets will be forwarded. For (S,G) entries, this list will not include the interfaces inherited from the (*,G) entry.

Related Commands

Command

Description

ipv6 multicast-routing

Enables multicast routing using PIM and MLD on all IPv6-enabled interfaces of the router and enables multicast forwarding.

show ipv6 mfib

Displays the forwarding entries and interfaces in the IPv6 MFIB.

show ipv6 mroute active

To display the active multicast streams on the router, use the show ipv6 mroute activecommand in user EXEC or privileged EXEC mode.

show ipv6 mroute [ vrf vrf-name ] [ link-local | group-name | group-address ] active [kbps]

Syntax Description

vrf vrf-name

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

link-local

(Optional) Displays the link-local groups.

group-name | group-address

(Optional) IPv6 address or name of the multicast group.

kbps

(Optional) Displays the rate that active sources are sending to multicast groups. Active sources are those sending at the kbps value or higher. The kbps argument defaults to 4 kbps.

Command Default

The kbps argument defaults to 4 kbps.

Command Modes


User EXEC
Privileged EXEC

Command History

Release

Modification

12.3(2)T

This command was introduced.

12.2(18)S

This command was integrated into Cisco IOS Release 12.2(18)S.

12.0(26)S

The link-local keyword was added.

12.3(4)T

The link-local keyword was added.

12.2(25)S

The link-local keyword was added.

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.

Cisco IOS XE Release 2.1

This command was introduced on Cisco ASR 1000 Series Routers.

15.1(4)M

The vrf vrf-name keyword and argument were added.

Usage Guidelines

The show ipv6 mroute activecommand displays active multicast streams with data rates that are greater than or equal to the kilobits per second set by the user. The command default is 4 kbps.

Examples

The following is sample output from the show ipv6 mroute activecommand:

Router# show ipv6 mroute active
Active IPv6 Multicast Sources - sending >= 4 kbps
Group:FF05::1
 Source:2001::1:1:1
   Rate:11 pps/8 kbps(1sec), 8 kbps(last 8 sec)

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

Table 28 show ipv6 mroute active Field Descriptions

Field

Description

Group:

Summary information about counters for (*, G) and the range of (S, G) states for one particular group G. The following RP-tree: and Source: output fields contain information about the individual states belonging to this group.

Note   

For Source Specific Multicast (PIM-SSM) range groups, the Group: displays are statistical. All SSM range (S, G) states are individual, unrelated SSM channels.

Rate...kbps

Bytes per second divided by packets per second divided by 1000. On an IP multicast fast-switching platform, the number of packets per second is the number of packets during the last second. Other platforms may use a different approach to calculate this number. Please refer to the platform documentation for more information.

show ipv6 mtu

To display maximum transmission unit (MTU) cache information for IPv6 interfaces, use the show ipv6 mtucommand in user EXEC or privileged EXEC mode.

show ipv6 mtu [ vrf vrfname ]

Syntax Description

vrf

(Optional) Displays an IPv6 Virtual Private Network (VPN) routing/forwarding instance (VRF).

vrfname

(Optional) Name of the IPv6 VRF.

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)SB

The vrf keyword and vrfname argument were added.

Usage Guidelines

The vrf keyword and vrfname argument allow you to view MTUs related to a specific VRF.

Examples

The following is sample output from the show ipv6 mtucommand:

Router# show ipv6 mtu
MTU     Since    Destination Address
1400    00:04:21  5000:1::3
1280    00:04:50  FE80::203:A0FF:FED6:141D

The following is sample output from the show ipv6 mtu command using the vrf keyword and vrfname argument. This example provides information about the VRF named vrfname1:

Router# show ipv6 mtu vrf vrfname1 
MTU   Since       Source Address     Destination Address 
1300  00:00:04    2001:0DB8:2        2001:0DB8:7

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

Table 29 show ipv6 mtu Field Descriptions

Field

Description

MTU

MTU, which was contained in the Internet Control Message Protocol (ICMP) packet-too-big message, used for the path to the destination address.

Since

Age of the entry since the ICMP packet-too-big message was received.

Destination Address

Address contained in the received ICMP packet-too-big message. Packets originating from this router to this address should be no bigger than the given MTU.

Related Commands

Command

Description

ipv6 mtu

Sets the MTU size of IPv6 packets sent on an interface.