Thanks Justin, trusting DSCP on the CallManager switchports fixed the problem.<br><br>Thanks,<br>Brians<br><br><br><div class="gmail_quote">On Tue, Nov 25, 2008 at 7:08 PM, Justin Steinberg <span dir="ltr"><<a href="mailto:jsteinberg@gmail.com">jsteinberg@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Your switchport to your PSTN 2851 and to your CallManagers should be 'mls qos trust dcsp' and not 'mls qos trust cos'.<div>
<br></div><div>trusting COS is trusting layer 2 QoS, which requires a trunk port between the Switch and the endpoint. CM 6.1 can not be setup as a trunk, therefore your switchport to your CM must be 'trust dscp'. While you could setup a dot1q trunk between the 2851 and your Switch (to support L2 COS) you should still set the switchport to trust dscp for ease of management, especially since your 2851 MQC is marking DSCP.</div>
<div><br></div><div>HTH,</div><div><br></div><div>Justin<br><br><div class="gmail_quote"><div><div></div><div class="Wj3C7c">On Tue, Nov 25, 2008 at 7:25 PM, Brian <span dir="ltr"><<a href="mailto:bms314@gmail.com" target="_blank">bms314@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="Wj3C7c"><br>I've been banging my head trying to get a proper QoS configuration in our infrastructure. I've gone through the QoS SRND and Voice over Wireless Design Guide, but am still not seeing the correct DSCP markings on the 7921G wireless phones when I call to the PSTN. When I log into the web interface of the 7921 and look at the Stream statistics, I see the correct Receiver DSCP of EF, EF for calls between 7921 phones. However, when I make or receive a PSTN call from a 7921 phone, the Receiver DSCP says Default, Default.<br>
<br>Here is the quick rundown of the environment.<br><br>PRI connected 2851 - 12.4(15)T3<br>3560G - 12.2(44)SE1<br>WLC4402 running 5.1.151 with 1131 AP's<br>CUCM 6.1.2.1000-13<br>7921's with 1.2.1 firmware<br><br>
The WLC switchport is configured with 'mls qos trust cos' and the AP switchports are all configured with 'mls qos trust dscp' per the Voice over Wireless Design Guide. I've used the WLC Config Analyzer tool to ensure all of the proper voice settings for WMM, 802.1p, etc., etc. The CallManager and 2851 switchports are trusting cos. The 2851 has the following QoS config:<br>
<br>class-map match-all SCCP<br> match access-group name SCCP<br>class-map match-all RTP<br> match access-group name RTP<br>!<br>!<br>policy-map Voice<br> class RTP<br> set dscp ef<br> class SCCP<br> set dscp cs3<br>!<br>
!<br>ip access-list extended RTP<br> permit udp any range 16384 32767 any<br> permit udp any any range 16384 32767<br>ip access-list extended SCCP<br> permit tcp any eq 2000 any<br> permit tcp any any eq 2000<br>!<br>interface GigabitEthernet0/0<br>
service-policy input Voice<br> service-policy output Voice<br><br><br><br>When I look at the policy-map on the voice gateway router, I see almost all of the packets being matched in the RTP class so I feel like it is being marked properly in and out of the gateway. It seems like I am missing something simple here because this is not a difficult QoS environment. Does anyone have any ideas?<br>
<br><br>Thanks in advance,<br><font color="#888888">Brian<br><br><br><br><br>
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