I have HP Procurves and Shoretel in our enviroment. I have HP procurve 8806 as core and about 30 different procurves at the edge. Periodically I have network issues or voice quality. I mane differnt vlans for VOIP and different networks. I have applied QOS on the VOIP but no difference. Is there a way to find out if a vlan is having high usage or collision or i fix the problem. HP has not been very helpful.