Dell S4820T Configuration Manual page 173

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 15. 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)
LocalAddr RemoteAddr
* 2.2.2.1 2.2.2.2
To view specific information about BFD sessions, use the show bfd neighbors detail command.
R1(conf-if-te-4/24)#do show bfd neighbors detail
Session Discriminator: 1
Neighbor Discriminator: 1
Local Addr: 2.2.2.1
Bidirectional Forwarding Detection (BFD)
Interface State
Te 4/24 Up
Rx-int Tx-int Mult
100 100 3
Clients
C
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