Configuring OSPF inbound route filtering
OSPF calculates routes by using LSAs. The calculated routes can be filtered and only permitted routes are installed into the OSPF routing table.
OSPF provides the following filtering methods:
Filters routing information by destination address through ACLs and IP address prefixes
Filters routing information by next hop through the filtering criteria configured with the gateway keyword
Filters routing information by destination address through ACLs and IP address prefixes and by next hop through the filtering criteria configured with the gateway keyword
Filters routing information by routing policy specified by the route-policy keyword
For more information about IP prefix list and routing policy, see "Configuring routing policies."
To configure inbound route filtering:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPF view. | ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * | N/A |
3. Configure inbound route filtering. | filter-policy { acl-number [ gateway ip-prefix-name ] | gateway ip-prefix-name | ip-prefix ip-prefix-name [ gateway ip-prefix-name ] | route-policy route-policy-name } import | Not configured by default. |