Changing Physical Port Session Parameters

Configure BFD sessions with default intervals and a default role.
The parameters that you can configure are: Desired TX Interval, Required Min RX Interval, Detection
Multiplier, and system role. Configure these parameters per interface; if you change a parameter, the
change affects all physical port sessions on that interface.
CAUTION: When configuring BFD on VLAN or LAG interfaces, Dell Networking recommends a
minimum value of 500 milliseconds for both the transmit and minimum receive time, which
yields a final detection time of (500ms *3) 1500 milliseconds.
Change session parameters for all sessions on an interface.
INTERFACE PORT-CHANNEL mode
bfd interval milliseconds min_rx milliseconds multiplier value role [active
| passive]
View session parameters using the show bfd neighbors detail command.

Disabling BFD for Port-Channels

If you disable BFD on an interface, sessions on the interface are torn down.
A final Admin Down control packet is sent to all neighbors, and sessions on the remote system are placed
in a Down state.
To disable BFD for a port-channel, use the following command.
• Disable BFD for a port-channel.
INTERFACE PORT-CHANNEL mode
no bfd enable
Configuring Protocol Liveness
Protocol liveness is a feature that notifies the BFD manager when a client protocol is disabled.
When you disable a client, all BFD sessions for that protocol are torn down. Neighbors on the remote
system receive an Admin Down control packet and are placed in the Down state.
To enable protocol liveness, use the following command.
• Enable Protocol Liveness.
CONFIGURATION mode
bfd protocol-liveness
Bidirectional Forwarding Detection (BFD) 173