(Optional) Configuring GR Session Parameters on the Helper

Procedure

1. Run system-view

   The system view is displayed.

2. Run ospf [ process-id ]

   The OSPF view is displayed.

3. Run graceful-restart helper-role { [ { ip-prefix ip-prefix-name | acl-number acl-number | acl-name acl-name } | ignore-external-lsa | planned-only ] ^* | never }

   GR session parameters are set on the Helper.

   • The parameters ip-prefix, acl-number, and acl-name are used to configure a filtering policy. A switch enters the Helper mode only when it passes the filtering criteria in the policy.
   • The parameter ignore-external-lsa indicates that the Helper does not check AS-external LSAs. By default, the Helper checks AS-external LSAs.
   • The parameter planned-only indicates that the Helper supports only planned GR. By default, the Helper supports both planned GR and unplanned GR.
   • The parameter never indicates that the switch never enters the Helper mode.