Users Guide
Establish Sessions on Port-Channels
To establish a session, you must enable BFD at interface level on both ends of the link, as shown in the following example. The session
parameters do not need to match.
Figure 16. Establishing Sessions on Port-Channels
To establish a session on a port-channel, use the bfd neighbor ip-address command in INTERFACE PORT-CHANNEL mode.
View the established sessions using the show bfd neighbors command, as shown in Changing Port-Channel Session Parameters.
Viewing Established Sessions for VLAN Neighbors
R2(conf-if-po-1)#bfd neighbors 2.2.2.1
R2(conf-if-po-1)#do show bfd neighors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
V - VRRP
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 2.2.2.2 2.2.2.1
Po 1 Up 200 200 3 C
Changing Physical Port Session Parameters
Congure BFD sessions with default intervals and a default role.
The parameters that you can congure are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role. Congure
these parameters per interface; if you change a parameter, the change aects all physical port sessions on that interface.
CAUTION
: When conguring 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 nal detection time of (500ms *3) 1500
milliseconds.
Change session parameters for all sessions on an interface.
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Bidirectional Forwarding Detection (BFD)