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With the GR feature, the restarting router (known as the GR restarter) can notify the event to its GR
capable neighbors. GR capable neighbors (known as GR helpers) maintain their adjacencies with
the router within a GR interval. During this process, the FIB table of the router does not change. After
the restart, the router contacts its neighbors to retrieve its FIB.
By default, a RIP-enabled device acts as the GR helper. Perform this task on the GR restarter.
IMPORTANT:
You cannot enable RIP NSR on a device that acts as GR restarter.
To configure GR on the GR restarter:
Step
1.
Enter system view.
2.
Enter RIP view.
3.
Enable GR for RIP.
4.
(Optional.) Set the GR
interval.
Enabling RIP NSR
Nonstop Routing (NSR) allows the device to back up the routing information from the active RIP
process to the standby RIP process. After an active/standby switchover, NSR can complete 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 RIP NSR enabled cannot act as GR restarter.
To enable RIP NSR:
Step
1.
Enter system view.
2.
Enter RIP view.
3.
Enable RIP NSR.
Configuring BFD for RIP
RIP detects route failures by periodically sending requests. If it receives no response for a route
within a certain time, RIP considers the route unreachable. To speed up convergence, perform this
Command
system-view
rip [ process-id ] [ vpn-instance
vpn-instance-name ]
graceful-restart
graceful-restart interval interval
Command
system-view
rip [ process-id ] [ vpn-instance
vpn-instance-name ]
non-stop-routing
39
Remarks
N/A
N/A
By default, RIP GR is disabled.
By default, the GR interval is 60
seconds.
Remarks
N/A
N/A
By default, RIP NSR is disabled.
RIP NSR enabled for a RIP
process takes effect only on that
process. As a best practice,
enable RIP NSR for each process
if multiple RIP processes exist.
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Troubleshooting
