Users Guide

You can copy and paste from these examples to your CLI. To support your own IP addresses, interfaces,

names, and so on, be sure that you make the necessary changes.

NOTE: Whenever you make IS-IS configuration changes, clear the IS-IS process (re-started) using the

clear isis command. The clear isis command must include the tag for the ISIS process. The

following example shows the response from the router:

Dell#clear isis *

% ISIS not enabled.

Dell#clear isis 9999 *

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 53. IPv6 IS-IS Sample Topography

IS-IS Sample Configuration — Congruent Topology

IS-IS Sample Configuration — Multi-topology

IS-IS Sample Configuration — Multi-topology Transition

The following is a sample configuration for enabling IPv6 IS-IS.

Dell(conf-if-gi-3/17)#show config

Intermediate System to Intermediate System 499