Configuring Ospf Gr; Configuring Ospf Gr Restarter - HP FlexFabric 12900E Series Configuration Manual

Configuring OSPF GR

GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover
occurs.
Two routers are required to complete a GR process. The following are router roles in a GR process:
•
GR restarter—Graceful restarting router. It must have GR capability.
•
GR helper—A neighbor of the GR restarter. It helps the GR restarter to complete the GR
process.
OSPF GR has the following types:
•
IETF GR—Uses Opaque LSAs to implement GR.
•
Non-IETF GR—Uses link local signaling (LLS) to advertise GR capability and uses out of band
synchronization to synchronize the LSDB.
A device can act as a GR restarter and GR helper at the same time.

Configuring OSPF GR restarter

You can configure the IETF or non-IETF OSPF GR restarter.
IMPORTANT:
You cannot enable OSPF NSR on a device that acts as GR restarter.
Configuring the IETF OSPF GR restarter
Step
1. Enter system view.
2. Enable OSPF and enter its
view.
3. Enable
reception and advertisement
capability.
4. Enable the IETF GR.
5. (Optional.)
interval.
Configuring the non-IETF OSPF GR restarter
Step
1. Enter system view.
2. Enable OSPF and enter its
view.
3. Enable
signaling capability.
4. Enable
re-synchronization capability.
Command
system-view
ospf [ process-id | router-id
router-id
vpn-instance-name ] *
opaque LSA
opaque-capability enable
graceful-restart ietf [ global |
planned-only ] *
Set the GR
graceful-restart interval interval
Command
system-view
ospf [ process-id | router-id
router-id
vpn-instance-name ] *
the link-local
enable link-local-signaling
the out-of-band
enable
out-of-band-resynchronization
| vpn-instance
| vpn-instance
97
Remarks
N/A
N/A
By default, opaque LSA reception
and advertisement capability is
enabled.
By default, the IETF GR capability
is disabled.
By default, the GR interval is 120
seconds.
Remarks
N/A
N/A
By default, the link-local signaling
capability is disabled.
By default, the out-of-band
re-synchronization capability is
disabled.