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Step
4.
(Optional.) Enable GR helper
capability.
5.
(Optional.) Enable strict LSA
checking for the GR helper.
Configuring the non-IETF OSPF GR helper
Step
1.
Enter system view.
2.
Enable OSPF and enter its
view.
3.
Enable the link-local
signaling capability.
4.
Enable the out-of-band
re-synchronization capability.
5.
(Optional.) Enable GR
helper.
6.
(Optional.) Enable strict LSA
checking for the GR helper.
Triggering OSPF GR
OSPF GR is triggered by an active/standby switchover or when the following command is executed.
To trigger OSPF GR, perform the following command in user view:
Task
Trigger OSPF GR.
Configuring OSPF NSR
Nonstop routing (NSR) backs up OSPF link state information from the active process to the standby
process. After an active/standby switchover, NSR can complete link state recovery and route
regeneration without tearing down adjacencies or impacting forwarding services.
NSR does not require the cooperation of neighboring devices to recover routing information, and it is
typically used more often than GR.
IMPORTANT:
A device that has OSPF NSR enabled cannot act as GR restarter.
To enable OSPF NSR:
Step
1.
Enter system view.
Command
graceful-restart helper enable
[ planned-only ]
graceful-restart helper
strict-lsa-checking
Command
system-view
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
enable link-local-signaling
enable
out-of-band-resynchronization
graceful-restart helper enable
graceful-restart helper
strict-lsa-checking
Command
reset ospf [ process-id ] process graceful-restart
Command
system-view
99
Remarks
By default, GR helper capability is
enabled.
By default, strict LSA checking for
the GR helper is disabled.
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.
By default, GR helper is enabled.
By default, strict LSA checking for
the GR helper is disabled.
Remarks
N/A
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Troubleshooting
