R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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<RouterA> display bfd session
Total session number: 1 Up session number: 0 Init Mode: Active
IPv4 session working under Echo mode:
LD SourceAddr DestAddr State Holdtime Interface
3 192.168.2.1 192.168.2.2 Down / GE2/1/2
The output shows that the BFD session to the specified destination is down.
# Display routes destined for 100.1.1.0/24 on Router B when the route learned from Router A
ages out.
<RouterB> display ip routing-table 100.1.1.0 24 verbose
Routing Table : Public
Summary Count : 1
Destination: 100.1.1.0/24
Protocol: RIP Process ID: 1
Preference: 100 Cost: 4
IpPrecedence: QosLcId:
NextHop: 192.168.3.2 Interface: GigabitEthernet2/1/2
BkNextHop: 0.0.0.0 BkInterface:
RelyNextHop: 0.0.0.0 Neighbor : 192.168.3.2
Tunnel ID: 0x0 Label: NULL
BKTunnel ID: 0x0 BKLabel: NULL
State: Active Adv Age: 00h21m23s
Tag: 0
Configuring BFD for RIP (bidirectional control detection)
Network requirements
As shown in Figure 14, GigabitEthernet 2/1/2 of Router A and GigabitEthernet2 /1/1 of Router C run
RIP process 1. GigabitEthernet 2/1/1 on Router A runs RIP process 2. GigabitEthernet2 /1/2 on Router
C, and GigabitEthernet 2/1/1 and GigabitEthernet 2/1/2 on Router D run RIP process 1.
Configure a static route destined for 100.1.1.0/24 on Router A, configure a static route destined for
101.1.1.0 / 24 o n R o u t e r C , a n d e n a b l e s t a t i c r o u t e re distribution into RIP on Router A and Router C so
Router A can learn two routes destined for 100.1.1.0/24 through GigabitEthernet 2/1/2 and
GigabitEthernet 2/1/1, respectively, and uses the one through GigabitEthernet 2/1/2.
Enable BFD for RIP on GigabitEthernet 2/1/2 of Router A and GigabitEthernet 2/1/1 of Router C.
When the link over GigabitEthernet 2/1/2 fails, BFD can quickly detect the link failure and notify it to RIP
so RIP deletes the neighbor relationship and the route information learned on GigabitEthernet 2/1/2,
and uses the route destined for 100.1.1.0/24 through GigabitEthernet 2/1/1.