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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I would sniff the interface for the WLC
and see how the packets are marked in regards to DSCP -jason<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Brian<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, November 25, 2008
7:25 PM<br>
<b><span style='font-weight:bold'>To:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> [cisco-voip] QoS
configuration for environment with 7921 wirelessphones</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><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>
Brian<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
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