PurposeCommand or Action
Specifies an IPv4 address to be used as the source address in
BFD echo packets, where ip-address is the 32-bit IP address
in dotted-decimal format (A.B.C.D).
echo ipv4 source ip-address
Example:
RP/0/RSP0/CPU0:router(config-bfd)# echo ipv4
source 10.10.10.1
Step 4
commit
Step 5
Configuring BFD Session Teardown Based on Echo Latency Detection
Beginning in Cisco IOS XR 4.0.1, you can configure BFD sessions on non-bundle interfaces to bring down
a BFD session when it exceeds the configured echo latency tolerance.
To configure BFD session teardown using echo latency detection, complete the following steps.
Before you enable echo latency detection, be sure that your BFD configuration supports echo mode.
Echo latency detection is not supported on bundle interfaces.
DETAILED STEPS
SUMMARY STEPS
1.
configure
2.
bfd
3.
echo latency detect [percentage percent-value [count packet-count]
4.
commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enters BFD configuration mode.bfd
Example:
RP/0/RSP0/CPU0:router(config)# bfd
Step 2
Enables echo packet latency detection over the course of a BFD
session, where:
echo latency detect [percentage percent-value
[count packet-count]
Step 3
Example:
RP/0/RSP0/CPU0:router(config-bfd)# echo
latency detect
• percentage percent-value—Specifies the percentage of the
echo failure detection time to be detected as bad latency. The
range is 100 to 250. The default is 100.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 211
Implementing BFD
Configuring BFD Session Teardown Based on Echo Latency Detection
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