Configuring OSPF Graceful Restart 953Configuring the non-IETF standard OSPF GR RestarterFollow these steps to configure non-IETF standard OSPF GR Restarter:Configuring the OSPF GRHelperFollow these steps to configure the OSPF GR Helper:Triggering OSPF GracefulRestartPerforming main/backup switchover on a distributed device with two PDUs, orperforming the following configuration on an OSPF router will trigger OSPFGraceful Restart. Ensure that these routers are enabled with the followingcapabilities first:■ LLS (link local signaling)■ OOB (out of band re-synchronization)■ Opaque LSA advertisement■ IETF GR capabilityEnable the IETFstandard GracefulRestart capability forOSPFgraceful-restart ietf RequiredDisabled by defaultConfigure theGraceful Restartinterval for OSPFgraceful-restart interval timer Optional120 seconds by defaultTo do... Use the command... RemarksEnter system view system-view -Enable OSPF andenter its viewospf [ process-id | router-idrouter-id | vpn-instanceinstance-name ] *RequiredDisabled by defaultEnable the use oflink-local signalingenable link-local-signaling RequiredDisabled by defaultEnable out-of-bandre-synchronizationenableout-of-band-resynchronizationRequiredDisabled by defaultEnable non IETFstandard GracefulRestart capability forOSPFgraceful-restart [ nonstandard ] RequiredDisabled by defaultConfigure theGraceful Restartinterval for OSPFgraceful-restart interval timer Optional120 seconds by defaultTo do... Use the command... RemarksTo do... Use the command... RemarksEnter system view system-view -Enable OSPF and enter itsviewospf [ process-id | router-idrouter-id | vpn-instanceinstance-name ] *RequiredDisabled by defaultConfigure for which OSPFneighbors the currentrouter can serve as a GRHelpergraceful-restart help{ acl-number | prefix prefix-list }OptionalThe router can server as aGR Helper for any OSPFneighbor by default.
