H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 268)

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To do… Use the command… Remarks
Enable the use of link-local
signaling
enable link-local-signaling
Required
Disabled by default
Enable out-of-band
re-synchronization enable
out-of-band-resynchronization
Required
Disabled by default
Enable non IETF standard
Graceful Restart capability for
OSPF
graceful-restart [ nonstandard ]
Optional
Disabled by default
Configure Graceful Restart interval
for OSPF
graceful-restart interval timer
Optional
120 seconds by default
z
With the graceful-restart command used, a device can act as a GR Restarter and a GR Helper.
z
Without the graceful-restart command used, a device can only act as a GR Helper.
Configuring the OSPF GR Helper
Follow these steps to configure the 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 ] *
Required
Disabled by default
Enable OSPF local link signaling enable link-local-signaling
Required
Disabled by default
Enable OSPF out of band
synchronization enable
out-of-band-resynchronization
Required
Disabled by default
Configure for which OSPF
neighbors the current 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 the following configuration on an OSPF router will trigger OSPF Graceful Restart. Ensure
that these routers are enabled with the following capabilities first:
z
LLS (link local signaling)
z
OOB (out of band re-synchronization)
z
Opaque LSA advertisement
z
IETF GR capability
Follow these steps to trigger OSPF Graceful Restart: