Table Of Contents

show ipv6 eigrp topology

show ipv6 eigrp traffic

show ipv6 flow cache aggregation

show ipv6 flow export

show ipv6 general-prefix

show ipv6 inspect

show ipv6 interface

show ipv6 local pool

show ipv6 mfib

show ipv6 mfib active

show ipv6 mfib count

show ipv6 mfib interface

show ipv6 mfib status

show ipv6 mfib summary

show ipv6 mld groups

show ipv6 mld groups summary

show ipv6 mld interface

show ipv6 mld snooping

show ipv6 mld ssm-map

show ipv6 mld traffic

show ipv6 mobile binding

show ipv6 mobile globals

show ipv6 mobile home-agent

show ipv6 mobile host groups

show ipv6 mobile router

show ipv6 mobile traffic

show ipv6 mobile tunnels

show ipv6 mrib client

show ipv6 mrib route

show ipv6 mroute

show ipv6 mroute active

show ipv6 mtu

show ipv6 nat statistics

show ipv6 eigrp topology

To display entries in the Enhanced Interior Gateway Routing Protocol (EIGRP) IPv6 topology table, use the show ipv6 eigrp topology command in privileged EXEC mode.

show ipv6 eigrp topology [as-number | ipv6-address] [active | all-links | pending | summary | zero-successors]

Syntax Description

as-number	(Optional) Autonomous system number.
ipv6-address	(Optional) IPv6 address.
active	(Optional) Displays only active entries in the EIGRP topology table.
all-links	(Optional) Displays all entries in the EIGRP topology table.
pending	(Optional) Displays all entries in the EIGRP topology table that are waiting for an update from a neighbor or are waiting to reply to a neighbor.
summary	(Optional) Displays a summary of the EIGRP topology table.
zero-successors	(Optional) Displays available routes in the EIGRP topology table.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.4(6)T	This command was introduced.
12.2(33)SRB	This command was integrated into Cisco IOS Release 12.2(33)SRB.
12.2(33)SXH	This command was integrated into Cisco IOS Release 12.2(33)SXH.

Usage Guidelines

The show ipv6 eigrp topology command can be used without any keywords or arguments. If this command is used without any keywords or arguments, then only routes that are feasible successors are displayed. The show ipv6 eigrp topology command can be used to determine diffusing update algorithm (DUAL) states and to debug possible DUAL problems.

Examples

The following is sample output from the show ipv6 eigrp topology command:

Router# show ipv6 eigrp topology

IPv6-EIGRP Topology Table for AS(1)/ID(2001:0DB8:10::/64)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - reply Status, s - sia Status

P 2001:0DB8:3::/64, 1 successors, FD is 281600

via Connected, Ethernet1/0 

show ipv6 eigrp traffic

To display the number of Enhanced Interior Gateway Routing Protocol (EIGRP) for IPv6 packets sent and received, use the show ipv6 eigrp traffic command in user EXEC or privileged EXEC mode.

show ipv6 eigrp traffic [as-number]

Syntax Description

as-number

(Optional) Autonomous system number.

Command Modes

User EXEC
Privileged EXEC

Command History

Release	Modification
12.4(6)T	This command was introduced.
12.2(33)SRB	This command was integrated into Cisco IOS Release 12.2(33)SRB.
12.2(33)SXH	This command was integrated into Cisco IOS Release 12.2(33)SXH.

Usage Guidelines

Use the show ipv6 eigrp traffic command to provide information on packets received and sent.

Examples

The following is sample output from the show ipv6 eigrp traffic command:

Router# show ipv6 eigrp traffic

IPv6-EIGRP Traffic Statistics for process 9

 Hellos sent/received: 218/205

 Updates sent/received: 7/23

 Queries sent/received: 2/0

 Replies sent/received: 0/2

 Acks sent/received: 21/14 

Table 105 describes the significant fields shown in the display.

Table 105 show ipv6 eigrp traffic Field Descriptions 

Field	Description
process 9	Autonomous system number specified in the ipv6 router eigrp command.
Hellos sent/received	Number of hello packets sent and received.
Updates sent/received	Number of update packets sent and received.
Queries sent/received	Number of query packets sent and received.
Replies sent/received	Number of reply packets sent and received.
Acks sent/received	Number of acknowledgment packets sent and received.

Related Commands

Command	Description
ipv6 router eigrp	Configures the EIGRP for IPv6 routing process.

show ipv6 flow cache aggregation

To display the aggregation cache configuration, use the show ipv6 cache flow aggregation command in privileged EXEC mode.

show ipv6 flow cache aggregation aggregation-type [verbose]

Syntax Description

aggregation-type	Displays the configuration of a particular aggregation cache as follows: •Autonomous system •Destination prefix •Prefix •Protocol-port •Source prefix
verbose	(Optional) Displays additional information from the aggregation cache.

Command Default

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.3(7)T	This command was introduced.
12.2(30)S	This command was integrated into Cisco IOS Release 12.2(30)S.
12.2(33)SRA	This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH	This command was integrated into Cisco IOS Release 12.2(33)SXH.

Examples

The following is an example display of an autonomous system aggregation cache using the show iv6 flow cache aggregation as command:

Router# show ipv6 flow cache aggregation as

IPv6 Flow Switching Cache, 278544 bytes

  2 active, 4094 inactive, 13 added

  178 ager polls, 0 flow alloc failures

Src If       Src AS  Dst If       Dst AS  Flows   Pkts  B/Pk  Active

Fa1/0         0      Null          0         1      2     49    10.2

Fa1/0         0      Se2/0         20        1      5    100     0.0

The following is a sample display of an autonomous system aggregation cache for the prefix mask 2001::FFFC/64 using the show ipv6 flow cache aggregation as command:

Router# show ipv6 flow cache aggregation as

IPv6 Flow Switching Cache, 278544 bytes

  2 active, 4094 inactive, 13 added

  178 ager polls, 0 flow alloc failures

Src If        Src AS  Dst If         Dst AS     Flows    Pkts  B/Pk  Active

e1/2           0      Null            0            1     2       49    10.2

e1/2           0      e1/2           20            1     5      100     0.0

The following is a sample display of an autonomous system aggregation cache for Ethernet1/2 using the show ipv6 flow cache verbose aggregation as command:

Router# show ipv6 flow cache aggregation as verbose 

IPv6 Flow Switching Cache, 278544 bytes

  2 active, 4094 inactive, 13 added

  178 ager polls, 0 flow alloc failures

Src If        Src AS  Dst If         Dst AS     Flows    Pkts  B/Pk  Active

e1/2           0      Null            0            1     2       49    10.2

e1/2           0      e1/2           20            1     5      100     0.0

Table 106 describes the significant fields shown in these examples.

Table 106 show ipv6 flow cache aggregation Field Descriptions

Field	Description
bytes	Number of bytes of memory used by the NetFlow cache.
active	Number of active flows in the NetFlow cache at the time this command was entered.
inactive	Number of flow buffers that are allocated in the NetFlow cache, but are not currently assigned to a specific flow at the time this command is entered.
added	Number of flows created since the start of the summary period.
ager polls	Number of times the NetFlow code looked at the cache to cause entries to expire (used by Cisco for diagnostics only).
flow alloc failures	Number of times the NetFlow code tried to allocate a flow but could not.
Src If	Specifies the source interface.
Src AS	Specifies the source autonomous system.
Dst If	Specifies the destination interface.
Dst AS	Specifies the destination autonomous system.
Flows	Number of flows.
Pkts	Number of packets.
B/Pk	Average number of bytes observed for the packets seen for this protocol (total bytes for this protocol or the total number of flows for this protocol for this summary period).
Active	Number of active flows in the NetFlow cache at the time this command was entered.

Related Commands

Command	Description
ipv6 flow-aggregation cache	Enables aggregation cache configuration mode.

show ipv6 flow export

To display the statistics for the data export, including the main cache and all other enabled caches, use the showipv6 flow export command in user EXEC or privileged EXEC mode.

show ipv6 flow export [template]

Syntax Description

template

(Optional) Displays export template statistics.

Command Modes

User EXEC
Privileged EXEC

Command History

Release	Modification
12.3(7)T	This command was introduced.
12.2(30)S	This command was integrated into Cisco IOS Release 12.2(30)S.
12.2(33)SRA	This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH	This command was integrated into Cisco IOS Release 12.2(33)SXH.

Examples

The following is sample output from the show ipv6 flow export command:

Router# show ipv6 flow export

Flow export is enabled

   Exporting flows to 10.42.42.1 (9991) 10.0.101.254 (9991) 

   Exporting using source IP address 10.0.101.203

   Version 5 flow records

   Export Stats for 10.42.42.1 (9991)

           3 flows exported in 3 udp datagrams

           0 flows failed due to lack of export packet

           3 export packets were sent up to process level

           0 export packets were dropped due to no fib

           0 export packets were dropped due to adjacency issues

           0 export packets were dropped enqueuing for the RP

           0 export packets were dropped due to IPC rate limiting

   Export Stats for 10.0.101.254 (9991)

           7 flows exported in 7 udp datagrams

           0 flows failed due to lack of export packet

           6 export packets were sent up to process level

           0 export packets were dropped due to no fib

           0 export packets were dropped due to adjacency issues

           0 export packets were dropped enqueuing for the RP

           0 export packets were dropped due to IPC rate limiting

Table 107 describes the significant fields shown in the display.

Table 107 show ipv6 flow export Field Descriptions 

Field	Description
Exporting flows to 10.42.42.1 (9991) 10.0.101.254 (9991)	Specifies the export destinations and ports. The ports are in parentheses.
Exporting using source IP address 10.0.101.203	Specifies the source address or interface.
Version 5 flow records	Specifies the version of the flow.
3 flows exported in 3udp datagrams	The total number of export packets sent, and the total number of flows contained within them.
0 flows failed due to lack of export packet	No memory was available to create an export packet.
0 export packets were sent up to process level	The packet could not be processed by CEF or by fast switching, possibly because another feature requires running on the packet.
0 export packets were dropped due to no fib 0 export packets were dropped due to adjacency issues	Indicates that CEF was unable to switch the packet or forward it up to the process level.
0 export packets were dropped enqueuing for the RP 0 export packets were dropped due to IPC rate limiting	Indicates that there was a problem transferring the export packet between the RP and the line card.

show ipv6 general-prefix

To display information on IPv6 general prefixes, use the show ipv6 general-prefix command in user EXEC or privileged EXEC mode.

show ipv6 general-prefix

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC
Privileged EXEC

Command History

Release	Modification
12.3(4)T	This command was introduced.

Usage Guidelines

Use the show ipv6 general-prefix command to view information on IPv6 general prefixes.

Examples

The following example shows an IPv6 general prefix called my-prefix, which has been defined based on a 6to4 interface. The general prefix is also being used to define an address on interface loopback42.

Router# show ipv6 general-prefix

IPv6 Prefix my-prefix, acquired via 6to4

2002:B0B:B0B::/48

 Loopback42 (Address command)

Table 108 describes the significant fields shown in the display.

Table 108 show ipv6 general-prefix Field Descriptions 

Field	Description
IPv6 Prefix	User-defined name of the IPv6 general prefix.
Acquired via	The general prefix has been defined based on a 6to4 interface. A general prefix can also be defined manually or acquired using DHCP for IPv6 prefix delegation.
2002:B0B:B0B::/48	The prefix value for this general prefix.
Loopback42 (Address command)	List of interfaces where this general prefix is used.

Related Commands

Command	Description
ipv6 general-prefix	Defines a general prefix for an IPv6 address manually.

show ipv6 inspect

To view Context-based Access Control (CBAC) configuration and session information, use the show ipv6 inspect command in privileged EXEC mode.

show ipv6 inspect {name inspection-name | config | interfaces | session [detail] | all}

Syntax Description

name inspection-name	Displays the configured inspection rule with the name inspection-name.
config	Displays the complete Cisco IOS firewall inspection configuration.
interfaces	Displays interface configuration with respect to applied inspection rules and access lists.
session [detail]	Displays existing sessions that are currently being tracked and inspected by Cisco IOS firewall. The optional detail keyword causes additional details about these sessions to be shown.
all	Displays all Cisco IOS firewall configuration and all existing sessions that are currently being tracked and inspected by Cisco IOS firewall.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.3(7)T	This command was introduced.

Examples

The following example asks for information about interfaces currently under inspection:

Router# show ipv6 inspect interfaces 

Related Commands

Command	Description
ipv6 inspect	Applies a set of inspection rules to an interface.

show ipv6 interface

To display the usability status of interfaces configured for IPv6, use the show ipv6 interface command in user EXEC or privileged EXEC mode.

show ipv6 interface [brief] [type number] [prefix]

Syntax Description

brief	(Optional) Displays a brief summary of IPv6 status and configuration for each interface.
type	(Optional) Displays information about only this interface type.
number	(Optional) Displays information about only this interface number.
prefix	(Optional) Prefix generated from a local IPv6 prefix pool.

Command Default

All IPv6 interfaces are displayed.

Command Modes

User EXEC
Privileged EXEC

Command History

Release	Modification
12.2(2)T	This command was introduced.
12.2(4)T	The OK, TENTATIVE, DUPLICATE, ICMP redirects, and ND DAD fields were added to the command output.
12.0(21)ST	This command was integrated into Cisco IOS Release 12.0(21)ST.
12.0(22)S	This command was integrated into Cisco IOS Release 12.0(22)S.
12.2(14)S	This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(25)S	Information on the current Unicast RPF configuration was added.
12.4(2)T	Command output was updated to show the state of the default router preference (DRP) preference value as advertised by a router through an interface.
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.
12.4(4)T	Command output was updated to show Hot Standby Router Protocol (HSRP) for IPv6 information.
12.2(33)SRA	This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH	This command was integrated into Cisco IOS Release 12.2(33)SXH.

Usage Guidelines

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

Use the show ipv6 interface command to validate the IPv6 status of an interface and its configured addresses. The show ipv6 interface command also displays the parameters that IPv6 is using for operation on this interface and any configured features.

If the interface's hardware is usable, the interface is marked up. If the interface can provide two-way communication for IPv6, the line protocol is marked up.

If you specify an optional interface type and number, the command displays information only about that specific interface. For a specific interface, you can enter the prefix keyword to see the IPv6 ND prefixes that are configured on the interface.

Examples

Interface Information for a Specific Interface with IPv6 Configured

To display information about the specified interface, specify an interface type and number. The following is sample output from the show ipv6 interface command when entered with an IPv6 interface type and number:

Router# show ipv6 interface ethernet 0/0

Ethernet0 is up, line protocol is up

  IPv6 is enabled, link-local address is 2001:0DB8::/29

  Global unicast address(es):

    2000:0DB8::2, subnet is 2001:0DB8::/64

  Joined group address(es):

    FF02::1

    FF02::2

    FF02::1:FF11:6770

  MTU is 1500 bytes

  ICMP error messages limited to one every 500 milliseconds

  ICMP redirects are enabled

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND advertised reachable time is 0 milliseconds

  ND advertised retransmit interval is 0 milliseconds

  ND router advertisements are sent every 200 seconds

  ND router advertisements live for 1800 seconds

  ND advertised default router preference is Medium 

  Hosts use stateless autoconfig for addresses.

Table 109 describes the significant fields shown in the display.

Table 109 show ipv6 interface Field Descriptions 

Field	Description
Ethernet 0 is up, down, administratively down (down and administratively down are not shown in sample output)	Indicates whether the interface hardware is active (whether line signal is present) and whether it has been taken down by an administrator. If the interface hardware is usable, the interface is marked "up." For an interface to be usable, both the interface hardware and line protocol must be up.
line protocol is up, down (down is not shown in sample output)	Indicates whether the software processes that handle the line protocol consider the line usable (that is, whether keepalives are successful or IPv6 CP has been negotiated). If the interface can provide two-way communication, the line protocol is marked up. For an interface to be usable, both the interface hardware and line protocol must be up.
IPv6 is enabled, stalled, disabled (stalled and disabled are not shown in sample output)	Indicates that IPv6 is enabled, stalled, or disabled on the interface. If IPv6 is enabled, the interface is marked "enabled." If duplicate address detection processing identified the link-local address of the interface as being a duplicate address, the processing of IPv6 packets is disabled on the interface and the interface is marked "stalled." If IPv6 is not enabled, the interface is marked "disabled."
link-local address	Displays the link-local address assigned to the interface.
Global unicast address(es):	Displays the global unicast addresses assigned to the interface.
Joined group address(es):	Indicates the multicast groups to which this interface belongs.
MTU	Maximum transmission unit of the interface.
ICMP error messages	Specifies the minimum interval (in milliseconds) between error messages sent on this interface.
ICMP redirects	The state of Internet Control Message Protocol (ICMP) IPv6 redirect messages on the interface (the sending of the messages is enabled or disabled).
ND DAD	The state of duplicate address detection on the interface (enabled or disabled).
number of DAD attempts:	Number of consecutive neighbor solicitation messages that are sent on the interface while duplicate address detection is performed.
ND reachable time	Displays the neighbor discovery reachable time (in milliseconds) assigned to this interface.
ND advertised reachable time	Displays the neighbor discovery reachable time (in milliseconds) advertised on this interface.
ND advertised retransmit interval	Displays the neighbor discovery retransmit interval (in milliseconds) advertised on this interface.
ND router advertisements	Specifies the interval (in seconds) for neighbor discovery router advertisements sent on this interface and the amount of time before the advertisements expire. As of Cisco IOS Release 12.4(2)T, this field displays the default router preference (DRP) value sent by this router on this interface.
ND advertised default router preference is Medium	The DRP for the router on a specific interface.

show ipv6 interface Command Using the brief Keyword

The following is sample output from the show ipv6 interface command when entered with the brief keyword:

Router# show ipv6 interface brief

Ethernet0 is up, line protocol is up

Ethernet0                  [up/up]

    unassigned

Ethernet1                  [up/up]

    2001:0DB8:1000:/29

Ethernet2                  [up/up]

    2001:0DB8:2000:/29

Ethernet3                  [up/up]

    2001:0DB8:3000:/29

Ethernet4                  [up/down]

    2001:0DB8:4000:/29

Ethernet5                  [administratively down/down]

    2001:123::210:7BFF:FEC2:ACD8

Interface         Status                IPv6 Address

Ethernet0         up                    3FFE:C00:0:1:260:3EFF:FE11:6770

Ethernet1         up                    unassigned

Fddi0             up                    3FFE:C00:0:2:260:3EFF:FE11:6772

Serial0           administratively down unassigned

Serial1           administratively down unassigned

Serial2           administratively down unassigned

Serial3           administratively down unassigned

Tunnel0           up                    unnumbered (Ethernet0)

Tunnel1           up                    3FFE:700:20:1::12 

IPv6 Interface with ND Prefix Configured

This example output shows the characteristics of an interface that has generated a prefix from a local IPv6 prefix pool:

Router# show ipv6 interface Ethernet 0/0 prefix 

interface Ethernet0/0

 ipv6 address 2001:0DB8::1/64

 ipv6 address 2001:0DB8::2/64

 ipv6 nd prefix 2001:0DB8:2::/64

 ipv6 nd prefix 2001:0DB8:3::/64 2592000 604800 off-link

end

.

.

.

IPv6 Prefix Advertisements Ethernet0/0

Codes: A - Address, P - Prefix-Advertisement, O - Pool

       U - Per-user prefix, D - Default

       N - Not advertised, C - Calendar

     default [LA] Valid lifetime 2592000, preferred lifetime 604800

AD   2001:0DB8:1::/64 [LA] Valid lifetime 2592000, preferred lifetime 604800

APD  2001:0DB8:2::/64 [LA] Valid lifetime 2592000, preferred lifetime 604800

P    2001:0DB8:3::/64 [A] Valid lifetime 2592000, preferred lifetime 604800 

The default prefix shows the parameters that are configured using the ipv6 nd prefix default command.

IPv6 Interface with DRP Configured

This example output shows the state of the DRP preference value as advertised by this router through an interface:

Router# show ipv6 interface gigabitethernet 0/1

  GigabitEthernet0/1 is up, line protocol is up

    IPv6 is enabled, link-local address is FE80::130

    Description: Management network (dual stack)

    Global unicast address(es):

      FEC0:240:104:1000::130, subnet is FEC0:240:104:1000::/64

    Joined group address(es):

      FF02::1

      FF02::2

      FF02::1:FF00:130

    MTU is 1500 bytes

    ICMP error messages limited to one every 100 milliseconds

    ICMP redirects are enabled

    ND DAD is enabled, number of DAD attempts: 1

    ND reachable time is 30000 milliseconds

    ND advertised reachable time is 0 milliseconds

    ND advertised retransmit interval is 0 milliseconds

    ND router advertisements are sent every 200 seconds

    ND router advertisements live for 1800 seconds

    ND advertised default router preference is Low

    Hosts use stateless autoconfig for addresses.

IPv6 Interface with HSRP Configured

When HSRP IPv6 is first configured on an interface, the interface IPv6 link-local address is marked unactive (UNA) because it is no longer advertised, and the HSRP IPv6 virtual link-local address is added to the virtual link-local address list with the UNA and tentative DAD (TEN) flags set. The interface is also programmed to listen for the HSRP IPv6 multicast address.

Router# show ipv6 interface ethernet 0/0

Ethernet0/0 is up, line protocol is up

  IPv6 is enabled, link-local address is FE80:2::2 [UNA]

  Virtual link-local address(es):

    FE80::205:73FF:FEA0:1 [UNA/TEN]

  Global unicast address(es):

    2001:2::2, subnet is 2001:2::/64 

  Joined group address(es):

    FF02::1

    FF02::2

    FF02::66

    FF02::1:FF00:2

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ND DAD is enabled, number of DAD attempts: 1

After the HSRP group becomes active, the UNA and TEN flags are cleared, and the optimistic DAD (OPT) flag is set. The solicited node multicast address for the HSRP virtual IPv6 address is also added to the interface.

Router# show ipv6 interface ethernet 0/0

Ethernet0/0 is up, line protocol is up

  IPv6 is enabled, link-local address is FE80:2::2 [UNA]

  Virtual link-local address(es):

    FE80::205:73FF:FEA0:1 [OPT]

  Global unicast address(es):

    2001:2::2, subnet is 2001:2::/64 

  Joined group address(es):

    FF02::1

    FF02::2

    FF02::66 

    FF02::1:FF00:2

    FF02::1:FFA0:1 

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ICMP redirects are enabled

  ND DAD is enabled, number of DAD attempts: 1

Table 110 describes additional significant fields shown in the displays for the show ipv6 interface command with HSRP configured.

Table 110 show ipv6 interface Command with HSRP Configured Field Descriptions 

Field	Description
IPv6 is enabled, link-local address is FE80:2::2 [UNA]	The interface IPv6 link-local address is marked UNA because it is no longer advertised.
FE80::205:73FF:FEA0:1 [UNA/TEN]	The virtual link-local address list with the UNA and TEN flags set.
FF02::66	HSRP IPv6 multicast address.
FE80::205:73FF:FEA0:1 [OPT]	HSRP becomes active, and the HSRP virtual address marked OPT.
FF02::1:FFA0:1	HSRP solicited node multicast address.

IPv6 Interface with Minimum RA Interval Configured

When using Mobile IPv6, a minimum interval between IPv6 router advertisement (RA) transmissions on an interface between can be configured. show ipv6 interface command output reports the minimum RA interval, when configured. If the minimum RA interval is not explicitly configured, then it is not displayed.

In the following example, the maximum RA interval is configured as 100 seconds, and the minimum RA interval is configured as 60 seconds on Ethernet interface 1/0:

Router(config-if)# ipv6 nd ra-interval 100 60

Subsequent use of the show ipv6 interface then displays the interval as follows:

Router(config)# show ipv6 interface ethernet1/0 

Ethernet1/0 is administratively down, line protocol is down 

  IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:5A01 [TEN]

  No Virtual link-local address(es):

  No global unicast address is configured

  Joined group address(es):

    FF02::1

    FF02::2

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ICMP redirects are enabled

  ICMP unreachables are sent

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND advertised reachable time is 0 milliseconds

  ND advertised retransmit interval is 0 milliseconds

  ND router advertisements are sent every 60 to 100 seconds

  ND router advertisements live for 1800 seconds

  ND advertised default router preference is Medium

  Hosts use stateless autoconfig for addresses.

In the following example, the maximum RA interval is configured as 100 milliseconds, and the minimum RA interval is configured as 60 milliseconds on Ethernet interface 1/0:

Router(config)# show ipv6 interface ethernet1/0 

Ethernet1/0 is administratively down, line protocol is down

  IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:5A01 [TEN]

  No Virtual link-local address(es):

  No global unicast address is configured

  Joined group address(es):

    FF02::1

    FF02::2

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ICMP redirects are enabled

  ICMP unreachables are sent

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND advertised reachable time is 0 milliseconds

  ND advertised retransmit interval is 0 milliseconds

  ND router advertisements are sent every 60 to 100 milliseconds

  ND router advertisements live for 1800 seconds

  ND advertised default router preference is Medium

  Hosts use stateless autoconfig for addresses.

Table 111 describes additional significant fields shown in the displays for the show ipv6 interface command with minimum RA interval information configured.

Table 111 show ipv6 interface Command with Minimum RA Interval Information Configuration Field Descriptions 

Field	Description
ND router advertisements are sent every 60 to 100 seconds	ND RAs are sent at an interval randomly selected from a value between the minimum and maximum values. In this example, the minimum value is 60 seconds, and the maximum value is 100 seconds.
ND router advertisements are sent every 60 to 100 milliseconds	ND RAs are sent at an interval randomly selected from a value between the minimum and maximum values. In this example, the minimum value is 60 milliseconds, and the maximum value is 100 milliseconds.

Related Commands

Command	Description
ipv6 nd prefix	Configures which IPv6 prefixes are included in IPv6 router advertisements.
ipv6 nd ra interval	Configures the interval between IPv6 RA transmissions on an interface.
show ip interface	Displays the usability status of interfaces configured for IP.

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 poolname argument, 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

Table 112 describes the significant fields shown in the displays.

Table 112 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 [link-local |verbose | group-address-name | ipv6-prefix/prefix-length | source-address-name | active | count | interface | status | summary]

Cisco 7600 Series Routers

show ipv6 mfib [link-local |verbose | active | count | interface | status | summary]

Syntax Description

link-local	(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.
active	(Optional) Active multicast sources (rate in kbps).
count	(Optional) Route and packet count data.
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.

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.

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 display the set of entries that are forwarding an amount of traffic larger or equal to the amount set by the kbps argument.

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

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. Table 113 describes the MFIB forwarding entries and interface flags.

Table 113 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