Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 377)

Switching Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 15.15
loop-protection action
Use this command to specify the protective action to apply when a network loop is
detected on an interface.
Use the no variant of this command to reset the loop protection actions to the default
action, vlan-disable, on an interface.
Syntax loop-protection action {link-down|log-only|port-disable|vlan-disable|
none}
no loop-protection action
Default loop-protection action vlan-disable
Mode Interface Configuration
Usage See the Loop Protection section in Chapter 14, Switching Introduction for relevant
conceptual, configuration, and overview information prior to applying this command.
Example To disable an interface (port1.0.4), and bring the link down, when a network loop is
detected, use the commands:
Related Commands loop-protection
loop-protection timeout
show loop-protection
thrash-limiting
Parameter Description
link-down Block all traffic on a port (or aggregated link) that detected the
loop, and take down the link.
log-only Details of loop conditions are logged. No action is applied to the
port (or aggregated link).
port-disable Block all traffic on interface for which the loop occurred, but keep
the link in the up state.
vlan-disable Block all traffic for the VLAN on which the loop traffic was detected.
Note that setting this parameter will also enable ingress filtering.
This is the default action.
none Applies no protective action.
awplus# configure terminal
awplus(config)# interface port1.0.4
awplus(config-if)# loop-protection action link-down