Configuring OSPFv3 route redistribution
Because OSPFv3 is a link state routing protocol, it cannot directly filter LSAs to be advertised. OSPFv3 filters only redistributed routes. Only routes that are not filtered out can be advertised in LSAs.
Executing the import-route or default-route-advertise command on a router makes it become an ASBR.
![[IMPORTANT: ]](images/important.png) | IMPORTANT: The import-route bgp4+ command redistributes only EBGP routes. Because the import-route bgp4+ allow-ibgp command redistributes both EBGP and IBGP routes, and might cause routing loops, use it with caution. | |
Redistributing routes from another routing protocol
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPFv3 view. | ospfv3 [ process-id | vpn-instance vpn-instance-name ] * | N/A |
3. Configure OSPFv3 to redistribute routes from other routing protocols. | import-route protocol [ as-number ] [ process-id | all-processes | allow-ibgp ] [ allow-direct | cost cost-value | nssa-only | route-policy route-policy-name | tag tag | type type ] * | By default, route redistribution is disabled. |
4. (Optional.) Configure OSPFv3 to filter redistributed routes. | filter-policy { ipv6-acl-number | prefix-list prefix-list-name } export [ protocol [ process-id ] ] | By default, OSPFv3 accepts all redistributed routes. This command filters only routes redistributed with the import-route command. If the import-route command is not configured, executing this command does not take effect. |
Redistributing a default route
The import-route command cannot redistribute a default external route. Perform this task to redistribute a default route.
To redistribute a default route:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPFv3 view. | ospfv3 [ process-id | vpn-instance vpn-instance-name ] * | N/A |
3. Redistribute a default route. | default-route-advertise [ [ always | permit-calculate-other ] | cost cost-value | route-policy route-policy-name | tag tag | type type ] * | By default, no default route is redistributed. |
Setting tags for redistributed routes
Perform this task to set tags for redistributed routes to identify information about protocols. For example, when redistributing IPv6 BGP routes, OSPFv3 uses tags to identify AS IDs.
To set a tag for redistributed routes:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPFv3 view. | ospfv3 [ process-id | vpn-instance vpn-instance-name ] * | N/A |
3. Set a tag for redistributed routes. | default tag tag | By default, the tag of redistributed routes is 1. |