Disabling Echo Mode - Cisco ASR 9000 Series Routing Configuration Manual

Disabling Echo Mode

SUMMARY STEPS
1. configure
2. bfd
3. echo startup validate [force]
4. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
bfd
Example:
RP/0/0RP0RSP0/CPU0:router(config)# bfd
Step 3 echo startup validate [force]
Example:
RP/0/0RP0RSP0/CPU0:router(config-bfd)#
echo startup validate
Step 4
commit
Disabling Echo Mode
BFD does not support asynchronous operation in echo mode in certain environments. Echo mode should be
disabled when using BFD for the following applications or conditions:
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
274
Purpose
Enters BFD configuration mode.
Enables verification of the echo packet path before starting a BFD session,
where an echo packet is periodically transmitted on the link to verify
successful transmission within the configured latency before allowing the
BFD session to change state.
When the force keyword is not configured, the local system performs echo
startup validation if the following conditions are true:
• The local router is capable of running echo (echo is enabled for this
session).
• The remote router is capable of running echo (received control packet
from remote system has non-zero "Required Min Echo RX Interval"
value).
When the force keyword is configured, the local system performs echo
startup validation if following conditions are true.
• The local router is capable of running echo (echo is enabled for this
session).
• The remote router echo capability is not considered (received control
packet from remote system has zero or non-zero "Required Min Echo
RX Interval" value).
Implementing BFD