Configuring Ospfv3 Gr; Configuring Gr Restarter; Configuring Gr Helper - HP 5500 EI series Configuration Manual

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Step
1.
Enter system view.
2.
Enter OSPFv3 view.
3.
Enable the logging of
neighbor state changes.

Configuring OSPFv3 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 be Graceful Restart capable.
GR helper—The neighbor of the GR restarter. It helps the GR restarter to complete the GR process.
To prevent service interruption after a master/backup switchover, a GR restarter running OSPFv3 must
complete the following tasks:
Keep the GR restarter forwarding entries stable during reboot.
Establish all adjacencies and obtain complete topology information after reboot.
After the active/standby switchover, the GR restarter sends a Grace LSA to tell its neighbors that it
performs a GR. Upon receiving the Grace LSA, the neighbors with the GR helper capability enter the
helper mode (and are called "GR helpers"). Then, the GR restarter retrieves its adjacencies and LSDB
with the help of the GR helpers.

Configuring GR restarter

You can configure the GR restarter capability on a GR restarter.
To configure GR restarter:
Step
1.
Enter system view.
2.
Enter OSPFv3 view.
3.
Enable the GR
capability.
4.
(Optional.) Configure
the GR interval.

Configuring GR helper

You can configure the GR helper capability on a GR helper.
To configure GR helper:
Command
system-view
ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *
log-peer-change
Command
system-view
ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *
graceful-restart enable
graceful-restart interval
interval-value
350
Remarks
N/A
N/A
By default, this feature is enabled.
Remarks
N/A
N/A
By default, OSPFv3 GR restarter
capability is disabled.
By default, the GR interval is 120
seconds.

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