Hi Everyone, I see that the standard practice on a switchport is to configure "switchport priority extend cos 0" in order to allow the ip phone to reset the cos value received from the PC to 0.
My question is how would a PC ever set a "CoS" value if the link between the ip phone and the PC is not an 802.1q trunk ? Can someone please help me understand this ? The only thing I can think of is that the PC would somehow have to support an 802.1q trunk to it, a trunk would have to be dynamically established between the phone and PC. And, then the user would have to manipulate the CoS value. Is this possible with a Cisco phone ? If this is the only case this would work then you would think that Cisco would document these pre-requisites. Perhaps I am confused. Please help ;-) Regards, Mike Brooks CCIE#16027 (R&S)
