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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'>This is a good topic for discussion. I
posted to this list a while back about which Cisco software packages, specifically
their VoIP software line, does and does not mark traffic before sending it on
to the switch. Because I have never received a firm answer, I always thought
it to be a best practice to mark / re-mark this traffic to be sure. If there
was a definitive with version numbers list I may default to trusting DSCP on
the switches using Auto-QoS. Until then, as long as re-marking the traffic doesn’t
have significant overhead, I don’t see the harm unless your QoS remarking was
misconfigured.<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>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Any of you Cisco guys want to shed some
light on this?<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>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>-Matt<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>Ed Leatherman<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, September 18, 2006
10:30 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Erik Erasmus (E)<br>
<b><span style='font-weight:bold'>Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip] auto QoS
for Ip telephony solution</span></font><o:p></o:p></p>
</div>
<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'>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<o:p></o:p></span></font></p>
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<p class=MsoNormal><span class=gmailquote><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On 9/18/06, <b><span style='font-weight:bold'>Erik
Erasmus (E)</span></b> <<a href="mailto:ErasmuE4@telkom.co.za">ErasmuE4@telkom.co.za</a>>
wrote:</span></font></span><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;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><span lang=EN-GB><o:p></o:p></span></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'> </span></font><span lang=EN-GB><o:p></o:p></span></p>
<ol start=1 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1'><font size=2 face=Arial><span lang=EN-GB
style='font-size:10.0pt;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><span lang=EN-GB><o:p></o:p></span></li>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1'><font size=2 face=Arial><span lang=EN-GB
style='font-size:10.0pt;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><span lang=EN-GB><o:p></o:p></span></li>
</ol>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'> </span></font><span lang=EN-GB><o:p></o:p></span></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br clear=all>
<br>
-- <br>
Ed Leatherman<br>
Senior Voice Engineer<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">West Virginia</st1:PlaceName> <st1:PlaceType
w:st="on">University</st1:PlaceType></st1:place> <br>
Telecommunications and Network Operations <o:p></o:p></span></font></p>
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