Use the following steps to migrate the Global Router Table (GRT) to use IPv6 Shortcuts over the SPBM core:
Identify the nodes that should be enabled with IPv6 Shortcuts. Apply these steps to all of these nodes.
Activate and validate basic IPv6 Shortcuts. For information, see SPBM IPv6 Shortcuts.
Configure IS-IS route preference to ensure that the IPv6 IGP protocol currently being used in the SPBM core is preferred over the IS-IS routes.
Enable redistribution of direct and static IPv6 routes into IS-IS.
Create route policies to permit only IPv6 IGP routes from the access side of the SPBM network.
Configure redistribution of routes from the IPv6 route table from each of the IPv6 IGP protocols into IS-IS along with the appropriate route policy.
Use the show isis spbm ipv6-unicast-fib command to check the IS-IS LSDB, IS-IS routes, and to verify that all the desired IPv6 routes are now in IS-IS.
Configure redistribution of IS-IS routes from the IPv6 route table into each of the IPv6 IGP protocols in use. This redistribution does not require a route policy since IS-IS is only supported in the SPBM core.
Change IS-IS route-preference to ensure that IS-IS routes are preferred over other IPv6 IGP routes.
Important