Configuring Bidirectional Control Detection; Configuring Rip Frr; Configuration Restrictions And Guidelines - HP FlexFabric 12900E Series Configuration Manual

Configuring bidirectional control detection

Step
1. Enter system view.
2. Enter RIP view.
3. Specify a RIP neighbor.
4. Enter interface view.
5. Enable BFD on the RIP
interface.

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
Router A
As shown in
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.
•
RIP FRR is available only when the state of primary link (with Layer 3 interfaces staying up)
changes from bidirectional to unidirectional or down.
•
Equal-cost routes do not support RIP FRR.
Command
system-view
rip [ process-id ] [ vpn-instance
vpn-instance-name ]
peer ip-address
interface
interface-number
rip bfd enable
Backup nexthop: Router C
Router B
Figure 6, configure FRR on Router B by using a routing policy to specify a backup next
interface-type
Nexthop: Router D
40
Remarks
N/A
N/A
By default, RIP does not unicast
updates to any peer.
Because the undo
command does not remove the
neighbor relationship
immediately, executing
command cannot bring down the
BFD session immediately.
N/A
By default, BFD is disabled on a
RIP interface.
Router E
peer
the