That is actually what I would expect. Because the SCCP frames are marked UP 4, which is Video, then CAC enabled on Video would mean that the phone would register. However, without setting the WLAN to Platinum, the voice frames that are marked UP 6, would be blocked.
Jason Boyers, CCIE #26024 (Wireless) Blog: netboyers.wordpress.com On Thu, Mar 7, 2013 at 4:37 PM, Thomas Perrier <[email protected]> wrote: > Interesting thread! This pushed me to test as well (with a 7921G). My > results were slightly different from what you state, Jason. I enabled > CAC for Voice only. With the WLAN QoS set to anything other than > platinum, the 7921G can't call my 7962G (network busy); however, it > has no trouble registering to CME. And then setting QoS to platinum > allows calls. > > Adding video CAC doesn't change anything. And with video CAC alone, > everything works fine too, no matter the QoS level. > > -Thomas > > > On Thu, Mar 7, 2013 at 2:38 PM, Jason Boyers <[email protected]> wrote: > > Do you have Admission Control/ACM/TSPEC enabled for the band in question. > > I'm presuming, based on the message you are seeing, that it is, and that > you > > have it enabled for Voice and Video. If that is the case, then what is > > happening is this: > > > > 1. Phone associates and authenticates to the radio > > 2. Phone tries to send a frame for call control that is marked UP 4. > > 3. The WLC looks to see if WMM is enabled on the WLAN. If it isn't, then > > proceed without anything in regards to QoS. > > 4. If it is, the WLC looks to see two things: is ACM enabled for that > class > > and is that class allowed on the WLAN. > > 5. In this case, ACM is enabled for the Video class (UP 4/5), therefore > the > > stream is admitted from a TSPEC perspective > > 6. However, the WLAN has Silver enabled for the QoS Profile. Therefore > any > > traffic that is marked other than BE/BK (UP 0-3) will be dropped. > > 7. Since the phone can therefore not register, it will attempt to find > > another network on which it can register. > > 8. As a side note, does it register AND allow calls to be made when the > > profile is set to Gold? I would presume that it will register, but you > > wouldn't be able to make calls due to the same issue. The RTP packets > would > > be marked UP 6, which would be higher than the allowed class. > > > > Let me know if this is the case. QoS if fun (keep repeating that over > and > > over). It's one of the key things for the lab, as it is mentioned in the > > Blueprint in several different sections. >
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