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

IpPrecedence: QosLcId:

NextHop: 192.168.2.2 Interface: Ethernet1/2

BkNextHop: 0.0.0.0 BkInterface:

RelyNextHop: 0.0.0.0 Neighbor : 192.168.2.2

Tunnel ID: 0x0 Label: NULL

BKTunnel ID: 0x0 BKLabel: NULL

State: Active Adv Age: 00h18m40s

Tag: 0

Configuring BFD for RIP (single-hop echo detection for a

specified destination)

Network requirements

As shown in Figure 10:

• Ethernet 1/2 of Router A and Ethernet 1/1 of Router B run RIP process 1. Ethernet 1/2 of Router B

and Router C runs RIP process 1.

• Configure a static route destined for 100.1.1.0/24 and enable static route redistribution into RIP on

both Router A and Router C so Router B can learn two routes destined for 100.1.1.0/24 through

Ethernet 1/1 and Ethernet 1/2. The route redistributed from Router A has a smaller cost than that

redistributed from Router C, so Router B uses the route from Ethernet 1/1.

• Enable BFD for RIP on Ethernet 1/2 of Router A, and specify Ethernet 1/1 of Router B as the

destination. When a unidirectional link occurs (packets from Router A can reach Router B, but

packets from Router B cannot reach Router A), BFD can quickly detect the link failure and notify it

to RIP. RIP then deletes the neighbor relationship and route information learned on Ethernet 1/2

and does not receive or send any packets on Ethernet 1/2. When the route learned from Router A

ages out, Router B uses the route destined for 100.1.1.1 24 through Ethernet 1/2.

Figure 10 Network requirements

Configuration procedure

1. Configure IP addresses for interfaces. (Details not shown.)

2. Configure basic RIP and enable BFD on the interfaces:

# Configure Router A.

<RouterA> system-view

[RouterA] rip 1