I've used the Nortel phones. They do DSCP tagging.<div><br></div><div>Mike<br><br><div class="gmail_quote">On Thu, Feb 3, 2011 at 3:58 PM, Norton, Mike <span dir="ltr"><<a href="mailto:mikenorton@pwsd76.ab.ca">mikenorton@pwsd76.ab.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Michael -<br>
<div class="im"><br>
"We can't count on the handset marking its traffic as DSCP 46 (or CoS 5) as we're using a mash-up of Cisco IP phones, Nortel phones, etc."<br>
<br>
</div>Have you actually verified that, or are you just assuming it? Even the crappy $90 Grandstream SIP phone I play with Asterisk with at home will tag its packets. You are better off properly configuring your phones to mark their packets than over-complicating things at the switch. As another poster mentioned, re-marking ALL traffic from a particular subnet as DSCP EF is not particularly wise because not all traffic will be worthy of priority. For example, if your phones all fetch a new firmware image over TFTP you do not want all that going through priority queue. Only RTP stream should be EF.<br>
<font color="#888888"><br>
--<br>
Mike Norton<br>
I.T. Support<br>
Peace Wapiti School Division No. 76<br>
Helpdesk: 780-831-3080<br>
Direct: 780-831-3076<br>
</font><div><div></div><div class="h5"><br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a> [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a>] On Behalf Of Michael Crilly<br>
Sent: Wednesday, February 02, 2011 10:14 AM<br>
To: <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>; <a href="mailto:cisco-nsp@puck.nether.net">cisco-nsp@puck.nether.net</a><br>
Subject: [cisco-voip] QoS on Catalyst 3550<br>
<br>
Greetings,<br>
<br>
I am attempting to configure QoS on a series of 3550s, a 3560 and our core switch, a 4500. Currently, I am testing QoS configurations on the 3550, but with limited success.<br>
<br>
Using auto qos would be nice, but we can't count on the handset marking its traffic as DSCP 46 (or CoS 5) as we're using a mash-up of Cisco IP phones, Nortel phones, etc. Therefore, we want to match traffic on our VoIP IP network, which is currently configured to run on <a href="http://10.200.0.0/16" target="_blank">10.200.0.0/16</a>.<br>
<br>
The issue I am having is nothing is being matched when I look at the output of 'show policy-map interface fa0/3' (fa0/3, for example), but I can see packets being classified as DSCP 46 when I look at the 'mls qos interface fa0/3 stats' command.<br>
<br>
I have attached my switch's configuration (with passwords censored).<br>
Could someone take a quick peak and let me know if they can see anything that is missing? It could be something obvious that my now stale eyes are missing, so a fresh pair might help.<br>
<br>
Thanks in advance for all assistance/responses.<br>
<br>
Kind regards,<br>
<br>
--<br>
<br>
Michael Crilly<br>
ICT Systems Administrator<br>
Comtek Network Systems<br>
<br>
E: <a href="mailto:michael.crilly@comtek.co.uk">michael.crilly@comtek.co.uk</a><br>
<br>
<br>
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