Configuration restrictions and guidelines, Configuration prerequisites, Configuration procedure – H3C Technologies H3C S5560 Series Switches User Manual
Page 57: Configuring rip frr, Enabling bfd for rip frr
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As shown in
, 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 "
Configuration procedure
Configuring RIP FRR
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Configure the source address
of echo packets.
bfd echo-source-ip ip-address
By default, the source address of
echo packets is not configured.
3.
Enter RIP view.
rip [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
4.
Configure RIP FRR.
fast-reroute route-policy
route-policy-name
By default, RIP FRR is disabled.
Enabling BFD for RIP FRR
By default, RIP FRR does not use BFD to detect primary link failures. To speed up RIP convergence, enable
BFD single-hop echo detection for RIP FRR to detect primary link failures.
To configure BFD for RIP FRR:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Configure the source IP
address of BFD echo packets. bfd echo-source-ip ip-address
By default, the source IP address of
BFD echo packets is not
configured.
3.
Enter interface view.
interface interface-type
interface-number
N/A
4.
Enable BFD for RIP FRR.
rip primary-path-detect bfd echo
By default, BFD for RIP FRR is
disabled.