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,
