H3C LS-3100-52P-OVS-H3 Operation Manual - page 582
1-44
To do…
Use the command…
Remarks
Configure Graceful Restart
interval for OSPF
graceful-restart interval timer
Optional
120 seconds by default
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 ] *
Required
Disabled by default
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 ] *
Required
Disabled by default
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-resynchronizati
on
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 an OSPF Graceful Restart process.