Administrator Guide

You can configure IPv6 IS-IS routes in one of the following three different methods:
• Congruent Topology — You must configure both IPv4 and IPv6 addresses on the interface. Enable the ip router isis and
ipv6 router isis commands on the interface. Enable the wide-metrics parameter in router isis configuration mode.
• Multi-topology — 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 router isis command. In router isis
configuration mode, enable multi-topology under address-family ipv6 unicast.
• 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 61. IPv6 IS-IS Sample Topography
The following is a sample configuration for enabling IPv6 IS-IS.
IS-IS Sample Configuration — Congruent Topology
Dell(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
Dell (conf-if-te-3/17)#
Dell(conf-router_isis)#show config
!
router isis
metric-style wide level-1
metric-style wide level-2
net 34.0000.0000.AAAA.00
Dell (conf-router_isis)#
IS-IS Sample Configuration — Multi-topology
Dell(conf-if-te-3/17)#show config
!
interface TenGigabitEthernet 3/17
ipv6 address 24:3::1/76
ipv6 router isis
no shutdown
Dell(conf-if-te-3/17)#
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Intermediate System to Intermediate System