407
FEC Type: LSP
FEC Info:
Destination: 1.1.1.9
Mask Length: 32
NHLFE ID: -
Local Discr: 514 Remote Discr: 514
Source IP: 1.1.1.9 Destination IP: 3.3.3.9
Session State: Up Session Role: Active
Template Name: -
FEC Type: LSP
FEC Info:
Destination: 3.3.3.9
Mask Length: 32
NHLFE ID: 1025
Local Discr: 513 Remote Discr: 513
Source IP: 1.1.1.9 Destination IP: 127.0.0.1
Session State: Up Session Role: Passive
Template Name: -
The output shows that two BFD sessions have been established between Switch A and Switch C.
One session verifies the connectivity of the LSP from 3.3.3.9/32 to 1.1.1.9/32 and the other session
verifies the connectivity of the LSP from 1.1.1.9/32 to 3.3.3.9/32.
BFD for PW configuration example
Network requirements
Create two LDP PWs to implement PW redundancy between CE 1 and CE 2. The primary PW goes
through PE 1—PE 2. The backup PW goes through PE 1—PE 3. Configure BFD to inspect the
connectivity of the primary PW. When the primary PW fails, CE 1 and CE 2 communicate through the
backup PW.
Figure 106 Network diagram
Loop0 Loop0
CE 1 CE 2PE 1 PE 2
Vlan-int12
Vlan-int12
Loop0
PE 3
Vlan-
int10
Vlan-
int10
Vlan
-int13
Vlan-int13
Vlan-
int10
Vlan-int10
MPLS or IP
backbone
Vlan-int10
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