Administrator Guide

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
To verify that the session is established, use the show bfd neighbors command.
The bold line shows the BFD session.
R1(conf-if-te-1/1/4/1)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 2.2.2.1 2.2.2.2
Te 1/1/4/1 Up 100 100 3 C
To view specific information about BFD sessions, use the show bfd neighbors detail command.
R1(conf-if-te-1/1/4/1)#do show bfd neighbors detail
Session Discriminator: 1
Neighbor Discriminator: 1
Local Addr: 2.2.2.1
Local MAC Addr: 00:01:e8:09:c3:e5
Remote Addr: 2.2.2.2
Remote MAC Addr: 00:01:e8:06:95:a2
Int: TenGigabitEthernet 1/1/4/1
State: Up
Configured parameters:
TX: 100ms, RX: 100ms, Multiplier: 3
Neighbor parameters:
TX: 100ms, RX: 100ms, Multiplier: 3
Actual parameters:
TX: 100ms, RX: 100ms, Multiplier: 3
Role: Active
Delete session on Down: False
Client Registered: CLI
Uptime: 00:03:57
Statistics:
Number of packets received from neighbor: 1775
Number of packets sent to neighbor: 1775
Number of state changes: 1
Number of messages from IFA about port state change: 0
Number of messages communicated b/w Manager and Agent: 4
Log messages display when you configure both interfaces for BFD.
R1(conf-if-te-1/1/4/1)#00:36:01: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session
state to
Down for neighbor 2.2.2.2 on interface Te 1/1/4/1 (diag: 0)
00:36:02: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session state to
Up for
neighbor
2.2.2.2 on interface Te 1/1/4/1 (diag: 0)
Viewing Physical Port Session Parameters
BFD sessions are configured with default intervals and a default role (active). Dell EMC Networking recommends maintaining the default
values.
To view session parameters, use the show bfd neighbors detail command.
Bidirectional Forwarding Detection (BFD)
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