I need some clarification on setting up voice vlans. The IP phone gives it own data packets a COS value of 5 if it has a PC attached it changes the COS value of packets received from the PC to a value 0?
On the switch settings, what is the difference between 1. âMLS QOS Trust COSâ and 2. âMLS QOS Trust device Cisco-phoneâ
If I use 1, If either Phone and PC or just PC is attached to the port, the switch excepts the COS value on all packets received on this port.
Using 2 if there is no phone on the port the switch does not trust the COS value. Is that about right?
If I use âSwitchport voice vlan dot1pâ the voice and data traffic is sharing the same vlan?
If I use âSwitchport voice vlan dot1qâ the voice traffic is on it own vlan?
Any verification of whether I am close or way off the mark would be appreciated. Thanks