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• 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 Command Remarks
1. Enter system view.
system-view
N/A
2. Enable OSPF and enter its
view.
ospf
[
process-id |
router-id
router-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Enable opaque LSA
reception and advertisement
capability.
opaque-capability enable
By default, opaque LSA reception
and advertisement capability is
enabled.
4. Enable the IETF GR.
graceful-restart ietf
[
global
|
planned-only
]
*
By default, the IETF GR capability
is disabled.
5. (Optional.) Configure the GR
interval.
graceful-restart interval
interval-value
By default, the GR interval is 120
seconds.
Configuring the non-IETF OSPF GR restarter
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enable OSPF and enter its
view.
ospf
[
process-id |
router-id
router-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Enable the link-local
signaling capability.
enable link-local-signaling
By default, the link-local signaling
capability is disabled.
4. Enable the out-of-band
re-synchronization capability.
enable
out-of-band-resynchronization
By default, the out-of-band
re-synchronization capability is
disabled.
5. Enable non-IETF GR.
graceful-restart
[
nonstandard
]
[
global
|
planned-only
]
*
By default, non-IETF GR
capability is disabled.
6. (Optional.) Configure the GR
interval.
graceful-restart
interval
interval-value
By default, the GR interval is 120
seconds.
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