Administrator Guide

Level-1 Metric Style Level-2 Metric Style Resulting Metric Value
wide transition narrow truncated value
wide transition narrow transition truncated value
wide transition transition truncated value
Sample Congurations
The following congurations are examples for enabling IPv6 IS-IS. These examples are not comprehensive directions. They are intended to
give you some guidance with typical congurations.
NOTE: Only one IS-IS process can run on the router, even if both IPv4 and IPv6 routing is being used.
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 conguration 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 congure IPv6 IS-IS routes in one of the following three dierent methods:
• Congruent Topology — You must congure 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 conguration mode.
• Multi-topology — You must congure the IPv6 address. Conguring the IPv4 address is optional. You must enable the ipv6 router
isis
command on the interface. If you congure IPv4, also enable the router isis command. In router isis conguration mode,
enable multi-topology under address-family ipv6 unicast.
• Multi-topology Transition — You must congure the IPv6 address. Conguring the IPv4 address is optional. You must enable the
ipv6 router isis command on the interface. If you congure IPv4, also enable the ip router isis command. In router isis
conguration mode, enable multi-topology transition under address-family ipv6 unicast.
Figure 60. IPv6 IS-IS Sample Topography
Intermediate System to Intermediate System
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