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

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Use undo bfd demand enable to restore the default.
Syntax
bfd demand enable
undo bfd demand enable
Default
The BFD session is in Asynchronous mode.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
In demand mode, no BFD control packets are exchanged after the session is established. When the
connectivity to another system needs to be verified explicitly, a system sends several BFD control packets
that have the Poll (P) bit set at the negotiated transmit interval. If no response is received within the
detection interval, the session is considered down. If the connectivity is found to be up, no more BFD
control packets are sent until the next command is issued.
In asynchronous mode, both endpoints periodically send BFD control packets to each other. BFD
considers that the session is down if it receives no BFD control packets within a specific interval.
Examples
# Enable the Demand BFD session mode on Ethernet 1/1.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] bfd demand enable
bfd detect-multiplier
Use bfd detect-multiplier to configure the single-hop detection time multiplier.
Use undo bfd detect-multiplier to restore the default.
Syntax
bfd detect-multiplier value
undo bfd detect-multiplier
Default
The single-hop detection time multiplier is 5.
Views
Interface view
Predefined user roles
network-admin
Parameters
value: Specifies a single-hop detection time multiplier in the range of 3 to 50.