131To do… Use the command… RemarksStep 2 Enable OSPF and enterits viewospf [ process-id |router-id router-id |vpn-instanceinstance-name ] *—Step 3 Enable the link-localsignaling capability enable link-local-signalingRequiredDisabled by defaultStep 4 Enable the out-of-bandre-synchronizationcapabilityenable out-of-band-resynchronizationRequiredDisabled by defaultStep 5 Configure theneighbors for which therouter can serve as aGR Helpergraceful-restarthelp { acl-number |prefix prefix-list }OptionalThe router can serve asa GR Helper for anyOSPF neighbor bydefault.Triggering OSPF Graceful RestartPerforming active or standby switchover on a switch, or performing the following configuration onan OSPF router, will trigger OSPF Graceful Restart.For the IETF standard GR-capable routers, ensure they have the following capabilities enabled:• Opaque LSA advertisement• IETF standard GRFor the non-IETF standard GR-capable routers, ensure they have the following capabilitiesenabled:• Link local signaling• Out-of-band re-synchronization• Non-IETF standard GRTo do… Use the command… RemarksTrigger OSPF GracefulRestartreset ospf [ process-id] process graceful-restartRequiredAvailable in user viewConfiguring BFD for OSPFAfter discovering neighbors by sending hello packets, OSPF notifies BFD of the neighboraddresses, and BFD uses theses addresses to establish sessions. Before a BFD session is
