Configuring Gr Restarter; Configuring Gr Helper - 3Com S7906E Configuration Manual

Configuring OSPFv3 GR
You cannot configure OSPFv3 GR after configuring OSPFv3 virtual links, becase they are not
supported at the same time.
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 adjacencieis and obtain complete topology information after reboot.
After the master/backup 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 thus called GR Helpers). Then, the GR Restarter retrieves its adjacencies and
LSDB with the help of the GR Helpers. Thus, the normal data forwarding is ensured.

Configuring GR Restarter

You can configure the GR Restarter capability on a GR Restarter.
Follow these steps to configure GR Restarter:
To do...
Enter system view
Enter OSPFv3 view
Enable the GR capability
Configure the GR interval

Configuring GR Helper

You can configure the GR Helper capability on a GR Helper.
Follow these steps to configure GR Helper
To do...
Enter system view
Enter OSPFv3 view
Enable the GR Helper
capability
Use the command...
system-view
ospfv3 [ process-id ]
graceful-restart enable
graceful-restart interval
interval-value
Use the command...
system-view
ospfv3 [ process-id ]
graceful-restart helper enable
1-15
Remarks
—
—
Required
Disabled by default.
Optional
120 seconds by default.
Remarks
—
—
Optional
Enabled by default.