PurposeCommand or Action
Enters interface configuration mode.
interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-isis)# interface
GigabitEthernet 0/1/0/3
Step 3
Specifies the IPv6 address family and enters router
address family configuration mode.
address-family ipv4 | ipv6 [ unicast ]
Example:
RP/0/RSP0/CPU0:router(config-isis)# address-family
ipv4 unicast
Step 4
•
This example specifies the unicast IPv4 address
family.
Specifies the link-group name and sets the tag at the
level specified.
link-group link-group-name [ level {1 | 2 } ]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
Step 5
)#address-family ipv4 unicast link-group access
level 1
commit
Step 6
(Optional) If link-group is configured on the interface,
when showing the IS-IS interface-related topology, this
command displays the link-group value.
show isis interface
Example:
RP/0/RSP0/CPU0:router# show isis interface
Step 7
Configuration Examples for Implementing IS-IS
This section provides the following configuration examples:
Configuring Single-Topology IS-IS for IPv6: Example
The following example shows single-topology mode being enabled. An IS-IS instance is created, the NET is
defined, IPv6 is configured along with IPv4 on an interface, and IPv4 link topology is used for IPv6.
This configuration allows POS interface 0/3/0/0 to form adjacencies for both IPv4 and IPv6 addresses.
router isis isp
net 49.0000.0000.0001.00
address-family ipv6 unicast
single-topology
interface POS0/3/0/0
address-family ipv4 unicast
!
address-family ipv6 unicast
!
exit
!
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 325
Implementing IS-IS
Configuration Examples for Implementing IS-IS
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