Configuring IS-IS Introducing External Routes

You can use the following command on the edge devices to introduce routes from other routing domains into IS-IS.

set protocols isis area-tag <text> [vrf <vrf-name>] redistribute ipv4-routing {bgp|connected|kernel|static|ospf|rip|table <table-id>} <level-1 | level-2> [metric <metric>]

set protocols isis area-tag <text> [vrf <vrf-name>] redistribute <ipv4-routing {bgp|connected|kernel|static|ospf|rip|table <table-id>} <level-1 | level-2> [route-map <route-map>]

set protocols isis area-tag <text> [vrf <vrf-name>] redistribute ipv6-routing {bgp|connected|kernel|static|ripng|ospf6|table <table-id>} <level-1 | level-2> [metric <metric>]

set protocols isis area-tag <text> [vrf <vrf-name>] redistribute ipv6-routing {bgp|connected|kernel|static|ripng|ospf6|table <table-id>} <level-1 | level-2> [route-map <route-map>]

When introducing other protocol routes, route-map <route-map> can be used to only introduce partial routes from other routing domains. Additionally, the configuration parameter metric <metric> sets the cost value of the introduced route.

You can refer to Configuration Example of Interaction Between IS-IS and BGP to see an example of IS-IS introducing external routes configuration.