86
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
mdc-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 VLAN-interface 11.
<Sysname> system-view
[Sysname] interface vlan-interface 11
[Sysname-Vlan-interface11] 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
mdc-admin
Parameters
value
: Specifies a single-hop detection time multiplier in the range of 3 to 50.