Cisco NCS 6000 Series User Manual

To configure BFD echo startup validation, complete the following steps.
Before you begin
Before you enable echo startup validation, be sure that your BFD configuration supports echo mode.
SUMMARY STEPS
1. configure
2. bfd
3. echo startup validate [force]
4. commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enters BFD configuration mode.bfd
Example:
Step 2
RP/0/0RP0RSP0/CPU0:router(config)# bfd
Enables verification of the echo packet path before starting
a BFD session, where an echo packet is periodically
echo startup validate [force]
Example:
Step 3
transmitted on the link to verify successful transmission
RP/0/0RP0RSP0/CPU0:router(config-bfd)# echo startup
validate
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).
commit
Step 4
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
155
Implementing BFD
Delaying BFD Session Startup Until Verification of Echo Path and Latency

Cisco NCS 6000 Series Specifications

General

Brand	Cisco
Model	NCS 6000 Series
Category	Network Router
Language	English