Reference Guide

• Multi-topology Transition — You must configure the IPv6 address. Configuring the IPv4 address is optional. You
must enable the ipv6 router isis command on the interface. If you configure IPv4, also enable the ip
router isis command. In router isis configuration mode, enable multi-topology transition
under address-family ipv6 unicast.
Figure 45. IPv6 IS-IS Sample Topography
The following is a sample configuration for enabling IPv6 IS-IS.
IS-IS Sample Configuration — Congruent Topology
FTOS(conf-if-te-3/17)#show config
!
interface TenGigabitEthernet 3/17
ip address 24.3.1.1/24
ipv6 address 24:3::1/76
ip router isis
ipv6 router isis
no shutdown
FTOS (conf-if-te-3/17)#
FTOS (conf-router_isis)#show config
!
router isis
metric-style wide level-1
metric-style wide level-2
net 34.0000.0000.AAAA.00
FTOS (conf-router_isis)#
IS-IS Sample Configuration — Multi-topology
FTOS (conf-if-te-3/17)#show config
!
interface TenGigabitEthernet 3/17
ipv6 address 24:3::1/76
ipv6 router isis
no shutdown
FTOS (conf-if-te-3/17)#
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