Advertising a default route
IS-IS cannot redistribute a default route to its neighbors. This task enables IS-IS to advertise a default route of 0.0.0.0/0 in an LSP to the same-level neighbors. Upon receiving the default route, the neighbors add it into their routing table.
To advertise a default route:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter IS-IS IPv4 unicast address family view. | isis [ process-id ] [ vpn-instance vpn-instance-name ] cost-style { wide | wide-compatible } address-family ipv4 [ unicast ] | N/A |
3. Advertise a Level-1 or Level-2 default route. | default-route-advertise [ [ level-1 | level-1-2 | level-2 ] | route-policy route-policy-name ] * | By default, IS-IS does not advertise a Level-1 or Level-2 default route. |