Specifications

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7-9
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 7 Configuring Bidirectional Forwarding Detection for BGP
Configuring BFD
Configuring BFD on a Port Channel
You can configure the BFD session parameters for all BFD sessions on a port channel. For example, if
the BFD session for one link on a port channel is up, BFD informs client protocols, such as BGP, that
the port channel is up. The BFD session parameters are negotiated between the BFD peers in a three-way
handshake.
This configuration overrides the global session parameters for the configured port channel. The member
ports of the port channel inherit the port channel BFD session parameters, unless you configure
subinterface-level BFD parameters on a member port. In that case, the member port subinterface uses
the subinterface BFD configuration if subinterface optimization is not enabled. See the “Optimizing
BFD on Subinterfaces” section on page 7-11 for more information.
BEFORE YOU BEGIN
Ensure that you are in the correct VDC (or use the switchto vdc command).
Ensure that you enable LACP on the port channel before you enable BFD.
Enable the BFD feature. See the “Enabling the BFD Feature” section on page 7-6.
SUMMARY STEPS
1. configure terminal
2. interface port-channel number
3. (Optional) bfd interval mintx min_rx msec multiplier value
4. (Optional) show running-config bfd
5. (Optional) copy running-config startup-config
DETAILED STEPS
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
interface port-channel number
Example:
switch(config)# interface port-channel 2
switch(config-if)#
Enters port channel configuration mode. Use the ?
keyword to display the supported number range.
Step 3
bfd interval mintx min_rx msec
multiplier value
Example:
switch(config-if)# bfd interval 250
min_rx 250 multiplier 3
(Optional) Configures the BFD session parameters for
all BFD sessions on the port channel. This overrides
the global BFD session parameters. The mintx and
msec range is from 250 to 999 milliseconds and the
default is 250. The multiplier range is from 3 to 50.
The multiplier default is 3.
To return to the default settings, use the
no bfd
interval
command.