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Configuring RIP FRR
A link or router failure on a path can cause packet loss and even routing loop until RIP completes routing
convergence based on the new network topology. FRR enables fast rerouting to minimize the impact of
link or node failures.
Figure 6
Network diagram for RIP FRR
In
Figure 6
, configure FRR on Router B by using a routing policy to specify a backup next hop. When the
primary link fails, RIP directs packets to the backup next hop. At the same time, RIP calculates the shortest
path based on the new network topology, and forwards packets over that path after network
convergence.
Configuration restrictions and guidelines
•
RIP FRR takes effect only for RIP routes learned from directly connected neighbors.
•
Do not use RIP FRR and BFD for RIP at the same time. Otherwise, FRR might fail to work.
•
RIP FRR is available only when the state of primary link (with Layer 3 interfaces staying up) changes
from bidirectional to unidirectional or down.
Configuration prerequisites
You must specify a next hop by using the
apply fast-reroute backup-interface
command in a routing
policy and reference the routing policy for FRR. For more information about routing policy configuration,
see "
Configuring routing policies
."
Configuration procedure
Configuring RIP FRR
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter RIP view.
rip
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Configure RIP FRR.
fast-reroute route-policy
route-policy-name
By default, RIP FRR is disabled.
