Delaying Bfd Session Startup Until Verification Of Echo Path And Latency - Cisco ASR 9000 Series Routing Configuration Manual

Implementing BFD
DETAILED STEPS
SUMMARY STEPS
1. configure
2. bfd
3. echo latency detect [percentage percent-value [count packet-count]
4. commit
DETAILED STEPS
Command or Action
Step 1 configure
Step 2 bfd
Example:
RP/0/RSP0/CPU0:router(config)# bfd
Step 3 echo latency detect [percentage percent-value
[count packet-count]
Example:
RP/0/RSP0/CPU0:router(config-bfd)# echo
latency detect
Step 4 commit

Delaying BFD Session Startup Until Verification of Echo Path and Latency

Beginning in Cisco IOS XR Release 4.0.1, you can verify that the echo packet path is working and within
configured latency thresholds before starting a BFD session on non-bundle interfaces.
Note Echo startup validation is not supported on bundle interfaces.
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.
Delaying BFD Session Startup Until Verification of Echo Path and Latency
Purpose
Enters BFD configuration mode.
Enables echo packet latency detection over the course of a BFD
session, where:
• percentage percent-value—Specifies the percentage of the
• count packet-count—Specifies a number of consecutive packets
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
echo failure detection time to be detected as bad latency. The
range is 100 to 250. The default is 100.
received with bad latency that will take down a BFD session.
The range is 1 to 10. The default is 1.
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