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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
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]
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Bidirectional Forwarding Detection (BFD)