R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

Configuring static route FRR

NOTE:

Support for this feature depends on the device model.

A link or router failure on a path can cause packet loss and even routing loop. Static route fast reroute

(FRR) enables fast rerouting to minimize the impact of link or node failures.

Figure 1 Network diagram for static route FRR

As shown in Figure 1, upon a link failure, FRR designates a backup next hop by using a routing policy for

routes matching the specified criteria. Packets are directed to the backup next hop to avoid traffic

interruption.

Configuration prerequisites

Create a routing policy to be referenced by FRR and use the apply fast-reroute backup-interface

command to specify a backup next hop in the routing policy. For more information about the command

and routing policy configurations, see "Configuring routing policies."

Configuration guidelines

• FRR takes effect only for static routes that have both an outgoing interface and next hop.

• Do not use FRR and BFD at the same time.

Configuration procedure

To configure static route FRR:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Configure the source address

of BFD echo packets.

bfd echo-source-ip ip-address

Not configured by default.

For more information about this

command, see High Availability

Command Reference.

3. Configure static route FRR.

ip route-static [ vpn-instance

vpn-instance-name ] fast-reroute

route-policy route-policy-name

Not configured by default.

Support for the keyword

vpn-instance depends on the

device model.