Users Guide

protocol-liveness Enable BFD protocol-liveness
R1(conf)#bfd enable
R1(conf)#do show running-config bfd
!
bfd enable
R1(conf)#
Establishing a Session on Physical Ports
To establish a session, enable BFD at the interface level on both ends of the link, as shown in the following
illustration. The configuration parameters do not need to match.
Figure 16. Establishing a BFD Session on Physical Ports
1 Enter interface mode.
CONFIGURATION mode
interface
2 Assign an IP address to the interface if one is not already assigned.
INTERFACE mode
ip address ip-address
3 Identify the neighbor that the interface participates with the BFD session.
INTERFACE mode
bfd neighbor ip-address
Examples of the show bfd neighbors command.
To verify that the session is established, use the show bfd neighbors command.
The bold line shows the BFD session.
R1(conf-if-te-4/24)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
Bidirectional Forwarding Detection (BFD) 184