Alvin, I had the same query, and I am still somewhat unclear on the answer.
If WMM traffic comes into the AP from the client with a UP value of 6 or 7 and CAC and you have voice CAC enabled in Platimum, then it would be mapped to CoS value of 5 based on the 802.1p value specified in the platinum class. Any WMM traffic coming in with a value of 6 or 7 without CAC would not be accepted as CAC is mandatory on the voice class. Any WMM traffic coming in with 4 or 5 without CAC would be accepted as there is no CAC on the video class. I am unclear however what would happen with a "non WMM" client as stated in the question, as I understood that if its non WMM it would not come in with a UP value. What happens to traffic that comes in without any UP value, is it mapped to 0?? Or does it take the value of the class defined on the controller profile?? Regards Phil -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: 10 March 2011 04:46 To: [email protected] Subject: [CCIE Wireless] 5.6 - WLC Qos Hi all, The 2nd portion of the question where ssid Guest2 is to allow WMM and non-WMM devices to connect. If a non-WMM device connects, it should not be able to use greater than AC Video. (not sure what this really means. quite vague) The DSG shows, the Guest2 WLAN to be configured with the platinum profile with dot1p of 6 (default). Correct me if I'm wrong, but if a non-WMM client gets associated with that WLAN, won't the LWAP upstream packet (to WLC)be mapped with DSCP associated with the QoS profile which is EF? Then later down the chain, the cos of the client's outgoing traffic from the WLC to LAN will be given a COS of 5? OR, is this question talking about the different wireless queueing/contention mechanism related to WMM and the 4 ACs, where non-wmm will be subjected to DCF instead of EDCF? Any input is greatly appreciated. Alvin B. _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
