Configuring OSPF to Filter ABR Type3 LSAs

Context

After filtering criteria are set for the incoming or outgoing Type 3 LSAs (Summary LSAs) in an area, only the Type 3 LSAs that pass the filtering criteria can be received or advertised.

This function applies only to ABRs.

Procedure

Run system-view

The system view is displayed.
Run ospf [ process-id ]

The OSPF process view is displayed.
Run area area-id

The OSPF area view is displayed.
Configure OSPF to filter incoming or outgoing Type 3 LSAs generated by ABRs as required.
- Run filter { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export
  
  OSPF is configured to filter Type 3 LSAs leaving the local area.
- Run filter { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } import
  
  OSPF is configured to filter Type 3 LSAs entering the local area.