Revisiting this thread since it seemed most related to my question.<br><br>As below, i've mainly been using "auto qos voip trust" on our interfaces between cat 3750 switches. I've been going through the qos documentation, particularly the SRND for enterprise qos - basically what it seems to be is there are alot of differences between running "auto qos" and the recommended configuration that they provide in the srnd.
<br><br>One particular thing that just jumped out at me today was, using auto qos voip trust on an interface doesn't appear to enable the priority queue (according to the "sh mls qos int queueing" command). If that's true i've got a ton of switches out there that need their configs fixed.. All my traffic comes out marked OK, and queueing and so forth are setup OK on our core routers but 90% of our distribution and access layer switches are 3550 or 3750 models.
<br><br>So is auto-qos flat out not intended for anything but trusted endpoints such as ccm servers? the further I dig into this the more it seems like this is the case.<br><br><br><div><span class="gmail_quote">On 9/18/06,
<b class="gmail_sendername">Erik Erasmus (E)</b> <<a href="mailto:ErasmuE4@telkom.co.za">ErasmuE4@telkom.co.za</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div dir="ltr">
<div dir="ltr"><font color="#000000" face="Arial" size="2">Thanks Ed</font></div>
<div dir="ltr"><font face="Arial" size="2"></font> </div>
<div dir="ltr"><font face="Arial" size="2">I think it sound like good advice - I was
basically planning to try it like you say.</font></div>
<div dir="ltr"><font face="Arial" size="2">If one does not have extensive resources it
is a lot easier and possibly good enough in most cases to use <span id="st" name="st" class="st">auto</span>
<span id="st" name="st" class="st">QoS</span>.</font></div>
<div dir="ltr"><font face="Arial" size="2"></font> </div>
<div dir="ltr"><font face="Arial" size="2">thanks for your advice - will let the group
know if during my implementation I see something interseting.</font></div></div>
<div dir="ltr"><br>
<hr>
<font face="Tahoma" size="2"><b>From:</b> Ed Leatherman
[mailto:<a href="mailto:ealeatherman@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">ealeatherman@gmail.com</a>]<br><b>Sent:</b> Mon 2006-09-18
16:29<span class="q"><br><b>To:</b> Erik Erasmus (E)<br><b>Cc:</b>
<a href="mailto:cisco-voip@puck.nether.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">cisco-voip@puck.nether.net</a><br><b>Subject:</b> Re: [cisco-voip] <span id="st" name="st" class="st">auto
</span> <span id="st" name="st" class="st">QoS</span> for Ip
telephony solution<br></span></font><br></div><div><span class="e" id="q_10dc1cf2f956aa14_3">
<div>Hi Erik,<br><br>I'm no qos expert by any stretch, this is just what we do
and it seems to work out for us.. traffic markings come out end-to-end how we
want them to at least. If someone else sees something wrong with it i'd love to
hear it. <br><br>I've been using "auto qos voip trust" on both those instances,
i've been adding to that "mls qos trust dscp" to the callmanager ports and layer
3 links, because the auto trust statement seems to put mls qos trust cos
instead. To my understanding the callmanager servers mark their traffic with the
dscp bits. <br><br>Ed<br><br>
<div><span class="gmail_quote">On 9/18/06, <b class="gmail_sendername">Erik Erasmus
(E)</b> <<a href="mailto:ErasmuE4@telkom.co.za" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">ErasmuE4@telkom.co.za</a>>
wrote:</span>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div vlink="purple" lang="EN-GB">
<div><br>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Currently at branches we use
auto-QoS VoIP cisco-phone on all the 3560 series switchports connection to
cisco phones and the same at HQ on the 4500 series switches.
</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"></span></font> </p>
<ol style="margin-top: 0cm;" type="1">
<li><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I want to know what is
recommended for the trunk interface on the switch between the branch gateway
and the lan switch on the 802.1Q trunk and also on the router main /
subinterfaces. </span></font>
</li><li><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Also what is recommended on
switch ports connecting to the Cisco Call Manager at HQ. Is it auto QoS VoIP
trust ???</span></font> </li></ol>
</div></div></div></blockquote></div></div></span></div></div><table><tbody><tr><td bgcolor="#ffffff"><font color="#000000">
</font><br></td></tr></tbody></table>
</blockquote></div>Ed Leatherman<br>Senior Voice Engineer<br>West Virginia University<br>Telecommunications and Network Operations