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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Configuring OSPF to Filter the Routes to Be Advertised

Configuring OSPF to Filter the Routes to Be Advertised


  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id ]

    The OSPF process view is displayed.

  3. Run filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]

    OSPF is configured to filter the routes imported through the import-route command. Only the routes that pass the filtering criteria are advertised.

    • The parameter acl-number specifies the number of a basic ACL.
    • The parameter acl-name acl-name specifies the name of an ACL.
    • The parameter ip-prefix ip-prefix-name specifies the name of an IP prefix list.
    • The parameter route-policy route-policy-name specifies the name of the route policy.

    You can specify the parameter protocol [ process-id ] to filter the routes of a certain routing protocol or a certain OSPF process. If protocol [ process-id ] is not specified, OSPF filters all the imported routes.

    • The import-route command cannot be used to import external default routes.
    • OSPF filters the imported routes, and generates Type 5 LSAs to advertise only external routes that passing the filtering criteria.

Updated: 2019-12-27

Document ID: EDOC1000174069

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