Proctection vs IP phone loop VOIP

[chaput]

HI

It make a cupple of time that a user connect the ethernet cable in the wall en make a loop with the IP phone

and make the network unstable.

does a protection exist for this? I know STP but it for Switch loop.

Tank you

[MaZ]

Hi,

Yes there is a protocol to prevent this kind of loop.

It's a spanning-tree alternative for edge ports.

If a loop is detected three actions are possible :

- send an alarm

- block the port

-block the port and send alarm

You'll find below the command for activating this feature on A-series and E-series :

On HPN E-series it is "loop-protect" :

loop-protect 'port'
loop-protect 'port' receiver-action {send-disable | send alarm}
loop-protect disable-timer {time in sec}
loop-protect trap loop-detected

On HPN A-series it is "loopback detection". You can enable it in two different context,

in system view (takes effect on ports in multiple or all VLANs) :

system-view

loopback-detection enable vlan { vlan-list | all }

loopback-detection action {none | shutdown }
loopback-detection interval-time interval {time in sec}

in vlan view (applies to ports in the current VLAN only)

system-view
vlan vlan-id
loopback-detection enable

loopback-detection action {none | shutdown }
loopback-detection interval-time interval {time in sec}

Bye,