Last week we have a network loop caused by a VoIP Phone - mitel 6865i. Someone plugin both ports of the phone into the wall / switch. Because the 2 port switch in the phone forward data frames but filter out BDPUs frames, so Spanning Tree have no change to detect this loop.
my question is now, is the voip phone complaint to ethernet standard ? Can i force mitel to change this behaviour to a more ethernet standard behaviour - means either passes BDPU through or process that BPDUs (have STP) ?
Whats your oppinion ??