address-family (IS-IS)
To enter address family configuration mode for configuring Intermediate System-to-Intermediate System (IS-IS) routing that use standard IP Version 4 (IPv4) and IP Version 6 (IPv6) address prefixes, use the address-family command in router configuration or interface configuration mode. To disable support for an address family, use the no form of this command.
address-family {ipv4 | ipv6} {unicast | multicast}
no address-family {ipv4 | ipv6} {unicast | multicast}
Syntax Description
ipv4 |
Specifies IPv4 address prefixes. |
ipv6 |
Specifies IPv6 address prefixes. |
unicast |
Specifies unicast address prefixes. |
multicast |
Specifies multicast address prefixes. |
Command Default
An address family is not specified. The default subaddress family (SAFI) is unicast.
Command Modes
Router configuration
Interface configuration
Command History
Release |
Modification |
---|---|
Release 3.7.2 |
This command was introduced. |
Release 3.9.0 |
Support for IPv6 was added. |
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the address family command to place the router or interface in address family configuration mode. In router address family configuration mode, you can configure routing that uses standard IPv4 or IPv6 address prefixes. An address family must be specified in interface configuration mode. In interface address family configuration mode, you can alter interface parameters for IPv4or IPv6.
You must specify an address family in order to configure parameters that pertain to a single address family.
Task ID
Task ID |
Operations |
---|---|
isis |
read, write |
Examples
The following example shows how to configure the IS-IS router process with IPv4 unicast address prefixes:
RP/0/RSP0/CPU0:router(config)# router isis isp
RP/0/RSP0/CPU0:router(config-isis)# interface gigabitEthernet 0/1/0/0
RP/0/RSP0/CPU0:router(config-isis-if)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-isis-if-af)#