HP MSR2000/3000/4000 Router Series High Availability Command Reference

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Usage guidelines
The detection time multiplier determines the maximum number of concurrent BFD packets (including
control packets and echo packets) that can be discarded.
Table 13 sh
ows the detection interval calculation methods.
Table 13 Detection interval calculation method
Mode Detection interval
Echo packet mode
Detection time multiplier of the sender × actual
packet sending interval of the sender
Control packet mode BFD session in
asynchronous mode
Detection time multiplier of the receiver × actual
packet sending interval of the receiver
Control packet mode BFD session in demand
mode
Detection time multiplier of the sender × actual
packet sending interval of the sender
Examples
# Configure the single-hop detection time multiplier as 6 on Ethernet 1/1.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] bfd detect-multiplier 6
bfd echo enable
Use bfd echo enable to enable the echo packet mode.
Use undo bfd echo enable to restore the default.
Syntax
bfd echo enable
undo bfd echo enable
Default
The echo packet mode is disabled.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
If you enable the echo packet mode for a BFD session in which control packets are sent and the session
comes up, BFD periodically sends echo packets to detect link connectivity and decreases the control
packet receiving rate at the same time.
Examples
# Enable the echo packet mode on Ethernet 1/1.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] bfd echo enable