H3C Technologies H3C S7500E Series Switches - Manual (Page 117)

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Configuring the OSPF GR Helper
You can configure the IETF standard or non IETF standard OSPF GR Helper.
Configuring the IETF standard OSPF GR Helper
Follow these steps to configure the IETF standard OSPF GR Helper:
To do… Use the command… Remarks
Enter system view system-view —
Enable OSPF and enter its view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
—
Enable opaque LSA reception and
advertisement
opaque-capability enable
Required
Not enabled by default.
Configure the neighbors for which
the router can serve as a GR
Helper
graceful-restart help
{ acl-number | prefix prefix-list }
Optional
The router can server as a GR
Helper for any OSPF neighbor by
default.
Configuring the non IETF standard OSPF GR Helper
Follow these steps to configure the non IETF standard OSPF GR Helper:
To do… Use the command… Remarks
Enter system view system-view —
Enable OSPF and enter its view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
—
Enable the link-local signaling
capability
enable link-local-signaling
Required
Disabled by default
Enable the out-of-band
re-synchronization capability
enable
out-of-band-resynchronization
Required
Disabled by default
Configure the neighbors for which
the router can serve as a GR
Helper
graceful-restart help
{ acl-number | prefix prefix-list }
Optional
The router can server as a GR
Helper for any OSPF neighbor by
default.
Triggering OSPF Graceful Restart
Performing an active/standby switchover on a distributed device, or performing the following
configuration on an OSPF router will trigger OSPF Graceful Restart.