Loopback-Detection Interval-Time; Loopback-Detection Specified-Vlan - Planet SGS-6341 Series Command Manual

Enable automatic recovery of the loopback-detection control mode after 30s.
Switch(config)# loopback-detection control-recovery timeout 30

6.4 loopback-detection interval-time

Command:
loopback-detection interval-time <loopback> <no-loopback>
no loopback-detection interval-time
Function:
Set the loopback detection interval. The no operate closes the loopback detection interval function.
Parameters:
<loopback > the detection interval if any loopback is found, ranging from 5 to 300, in seconds.
<no-loopback > the detection interval if no loopback is found, ranging from 1 to 30, in seconds.
Default:
The default value is 5s with loopbacks existing and 3s otherwise.
Command Mode:
Global Mode.
Usage Guide:
When there is no loopback detection, the detection interval can be relatively shorter, for too short a time would be a
disaster for the whole network if there is any loopback. So, a relatively longer interval is recommended when
loopbacks exist.
Example:
Set the loopback diction interval as 35, 15.
Switch(config)#loopback-detection interval-time 35 15

6.5 loopback-detection specified-vlan

Command:
loopback-detection specified-vlan <vlan-list>
no loopback-detection specified-vlan [<vlan-list>]
Function:
Enable the function of loopback detection on the port and specify the VLAN to be checked; the no operation of this
command will disable the function of detecting loopbacks through this port or the specified VLAN.
Parameters:
<vlan-list> the list of VLANs allowed passing through the port. Given the situation of a trunk port, the specified
VLANs can be checked. So this command is used to set the vlan list to be checked.
Default:
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SGS-6341 Series Command Guide