87
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 24 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 VLAN-interface 11.
<Sysname> system-view
[Sysname] interface vlan-interface 11
[Sysname-Vlan-interface11] 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
mdc-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 does the following:
•
Periodically sends echo packets to detect link connectivity.
•
Decreases the control packet receiving rate at the same time.
Examples
# Enable the echo packet mode on VLAN-interface 11.
<Sysname> system-view
[Sysname] interface vlan-interface 11
[Sysname-Vlan-interface11] bfd echo enable