Optimizing Bfd On Subinterfaces - Cisco 7604-RSP720C-R Configuration Manual

Chapter 5 Configuring Bidirectional Forwarding Detection
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
2.
3.
4.
5.
6.
DETAILED STEPS
Command
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Step 2
bfd slow-timer echo-interval
Example:
switch(config)# bfd slow-timer 2000
Step 3
interface int-if
Example:
switch(config)# interface ethernet 2/1
switch(config-if)#
Step 4
bfd echo
Example:
switch(config-if)# bfd echo
Step 5
show running-config bfd
Example:
switch(config-if)# show running-config
bfd
Step 6
copy running-config startup-config
Example:
switch(config-if)# copy running-config
startup-config

Optimizing BFD on Subinterfaces

You can optimize BFD on subinterfaces. BFD creates sessions for all configured subinterfaces. BFD sets
the subinterface with the lowest configured VLAN ID as the master subinterface and that subinterface
uses the BFD session parameters of the parent interface. The remaining subinterfaces use the slow timer.
If the optimized subinterface session detects an error, BFD marks all subinterfaces on that physical
interface as down.
OL-23435-03
bfd slow-timer echo-interval
interface int-if
bfd echo
(Optional) show running-config bfd
(Optional) copy running-config startup-config
Purpose
Enters configuration mode.
Configures the slow timer used in the echo function.
This value determines how fast BFD starts up a new
session and is used to slow down the asynchrounous
sessions when the BFD echo function is enabled. This
value overwrites the required minimum receive
interval when the echo function is enabled. The range
is from 1000 to 30000 milliseconds. The default is
2000.
Enters interface configuration mode. Use the ?
keyword to display the supported interfaces.
Enables the echo function. The default is enabled.
(Optional) Displays the BFD running configuration.
(Optional) Saves this configuration change.
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
Configuring BFD
5-13