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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The policy-map is not the only way to apply QoS. That’s only for
modular QoS. QoS can also be applied at the dial-peer level in the voice
gateway or by access list, to give two examples. Do you see the same value when
looking at packets from each direction?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Weigand, John V.
[mailto:jvw@medicineforthedefense.com] <br>
<b>Sent:</b> Tuesday, January 06, 2009 9:29 AM<br>
<b>To:</b> Sean Walberg; James Buchanan<br>
<b>Cc:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> RE: [cisco-voip] How to check for QoS?<o:p></o:p></span></p>
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<p align=right style='text-align:right'><span style='font-family:"Verdana","sans-serif";
color:navy'><a href="http://www.medicineforthedefense.com/"><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:olive'>Serious
Medicine for the Defense ®</span></a></span><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:olive'> </span><o:p></o:p></p>
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<table class=MsoNormalTable border=0 cellpadding=0 width="99%"
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<tr>
<td width="4%" style='width:4.0%;padding:.75pt .75pt .75pt .75pt'></td>
<td width="100%" colspan=2 valign=top style='width:100.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks so much for everyone’s input, it’s very much
appreciated!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>“show policy-map” on both our voice and data routers is
returning with nothing, so I’m taking that to mean we don’t have any
policies applied on those.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I was able to get the packet capture into Wireshark, and the
RTP packets are showing the following:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Differentiated Services Field: 0xb8 (DSCP 0x2e: Expedited
Forwarding; ECN: 0x00)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>
1011 10.. = Differentiated Services Codepoint: Expedited Forward (0x2e)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Based on my very limited knowledge, that does look like
we’re applying QoS somewhere? If that is the case, would it be applied at
the switchports?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
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<td width="45%" valign=top style='width:45.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><strong><span
style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:navy'>John
V. Weigand</span></strong><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>Help Desk Support/Executive Support<br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:black'><br>
Litigation Management, Inc.<br>
300 Allen-Bradley Drive<br>
Suite 200<br>
Mayfield Heights, OH 44124</span><o:p></o:p></p>
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<td width="51%" valign=top style='width:51.0%;padding:.75pt .75pt .75pt .75pt'>
<p><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:black'><br>
<br>
</span><span style='font-family:"Verdana","sans-serif";color:black'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:black'>Tel:</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'> 440-484-2000</span><span style='font-size:10.0pt;font-family:
"Verdana","sans-serif";color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:black'>Fax: 440-484-2009<br>
Cell: <br>
email: <a href="mailto:jvw@medicineforthedefense.com">jvw@medicineforthedefense.com</a>
</span><o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:7.5pt;
font-family:"Verdana","sans-serif";color:gray'><br>
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color:black'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'> Sean Walberg [mailto:swalberg@gmail.com] <br>
<b>Sent:</b> Monday, January 05, 2009 5:37 PM<br>
<b>To:</b> James Buchanan<br>
<b>Cc:</b> Weigand, John V.; cisco-voip@puck.nether.net<br>
<b>Subject:</b> Re: [cisco-voip] How to check for QoS?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:black'>If
you get the packet capture into Wireshark, you can (in addition to checking for
the DSCP == EF) measure the latency to see if QoS is doing its job.<br>
<br>
From a router, though, you can check your policy maps with "show
policy-map" or "show policy-map interface", it will tell you if
a policy is applied and what it's doing. You're looking for a priority
queue.<br>
<br>
The Cisco QoS SRND is a good way to understand QoS. It's hefty, but most
of the details are duplicated for every model of switch.<br>
<br>
Sean<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='color:black'>On Mon, Jan 5, 2009 at 4:07 PM,
James Buchanan <<a href="mailto:jbuchanan@ctiusa.com" target="_blank">jbuchanan@ctiusa.com</a>>
wrote:<o:p></o:p></span></p>
<div>
<div>
<p><span style='color:#1F497D'>Hi John,</span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>The biggest thing you are looking for is that
the voice traffic is being marked and that the marking is being recognized
throughout the network. A packet capture is the quickest way to determine
this. In the packet capture, you will see a field for Differentiated Services.
For traffic that is the actual audio payload, you should see the Differentiated
Services field as Expedited Forwarding. You will want to check packets going in
each direction. </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>On the switches, for ports that have a phone
plugged in you should see that the switchport is configured to trust cos and is
configured to trust based on the device being a cisco phone (mls qos trust cos
and mls qos trust cisco-phone). What these commands look like can vary
according to the model of switch. </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>For any connection that is a voice server or
voice gateway, the switchport should trust the dscp value (mls qos trust dscp).
This should also be true on uplinks from switch to switch and from switch to
WAN router.</span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>On the WAN router, depending upon the speed of
your connection you should be using some sort of low latency queuing and/or
traffic shaping.</span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>Thanks,</span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'>James</span><span style='color:black'><o:p></o:p></span></p>
<p><span style='color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>
<p><b><span style='font-size:10.0pt;color:black'>From:</span></b><span
style='font-size:10.0pt;color:black'> <a
href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>
[mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Weigand, John V.<br>
<b>Sent:</b> Monday, January 05, 2009 4:02 PM<br>
<b>To:</b> <a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> [cisco-voip] How to check for QoS?</span><span
style='color:black'><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p><span style='color:black'> <o:p></o:p></span></p>
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mso-position-horizontal-relative:text;mso-position-vertical-relative:line'
o:allowoverlap="f">
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</v:shape><![endif]--><![if !vml]><img width=279 height=54 src="" align=left
alt="Litigation Management" v:shapes="_x0000_s1028"><![endif]><o:p></o:p></p>
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<p align=right style='text-align:right'><span style='color:navy'><a
href="http://www.medicineforthedefense.com/" target="_blank"><span
style='font-size:10.0pt;color:olive'>Serious Medicine for the Defense ®</span></a></span><span
style='font-size:10.0pt;color:olive'> </span><o:p></o:p></p>
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<td width="1%" style='width:1.0%;border-top:solid windowtext 1.0pt;
border-left:none;border-bottom:none;border-right:solid windowtext 2.25pt;
padding:0in 0in 0in 0in;height:67.5pt;border-color:-moz-use-text-color -moz-use-text-color'></td>
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solid windowtext 1.0pt;border-bottom:solid windowtext 2.25pt;border-right:
none;padding:0in 0in 0in 0in;height:104.25pt;border-color:-moz-use-text-color -moz-use-text-color silver rgb(102, 102, 102)'>
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style='width:99.0%'>
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<td width="100%" colspan=2 valign=top style='width:100.0%;padding:.75pt .75pt .75pt .75pt'>
<p><span style='color:black'>I've been tasked with checking to see if our VAR
ever setup any QoS at all, and if so, what type and how it's set.
Unfortunately, although I've become fairly proficient at CallManager
itself, I'm pretty new to the inner workings of everything at the actual
network level.</span><o:p></o:p></p>
<p><span style='color:black'> </span><o:p></o:p></p>
<p><span style='color:black'>I know there's a few different ways to set it
all up, and I've tried poking around, but I'm not really even sure where to
begin looking. Does anyone have any pointers as to how I might be able to
track down some of this info? Is there anything I can tell from a packet
capture of a call from between two of our sites? I do also have read only
access to the switches/routers on the network. </span><o:p></o:p></p>
<p><span style='color:black'> </span><o:p></o:p></p>
<p><span style='color:black'>Thanks in advance!</span><o:p></o:p></p>
<p><span style='color:navy'> </span><o:p></o:p></p>
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<td width="4%" style='width:4.0%;padding:.75pt .75pt .75pt .75pt'></td>
<td width="45%" valign=top style='width:45.0%;padding:.75pt .75pt .75pt .75pt'>
<p style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
color:navy'>John V. Weigand</span></b><span style='font-size:10.0pt;
color:navy'><br>
</span><span style='font-size:7.5pt;color:navy'>Help Desk Support/Executive
Support<br>
</span><span style='font-size:7.5pt;color:black'><br>
Litigation Management, Inc.<br>
300 Allen-Bradley Drive<br>
Suite 200<br>
Mayfield Heights, OH 44124</span><o:p></o:p></p>
</td>
<td width="51%" valign=top style='width:51.0%;padding:.75pt .75pt .75pt .75pt'>
<p><span style='font-size:7.5pt;color:black'><br>
<br>
</span><span style='color:black'><br>
</span><span style='font-size:7.5pt;color:black'>Tel:</span><span
style='font-size:7.5pt;color:navy'> 440-484-2000</span><span
style='font-size:10.0pt;color:navy'><br>
</span><span style='font-size:7.5pt;color:black'>Fax: 440-484-2009<br>
Cell: <br>
email: <a href="mailto:jvw@medicineforthedefense.com" target="_blank">jvw@medicineforthedefense.com</a>
</span><o:p></o:p></p>
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<td style='border-top:none;border-left:none;border-bottom:solid windowtext 2.25pt;
border-right:solid windowtext 2.25pt;padding:0in 0in 0in 0in;height:104.25pt;
border-color:-moz-use-text-color silver silver -moz-use-text-color'></td>
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</table>
<p style='margin-bottom:12.0pt'><span style='font-size:7.5pt;color:gray'><br>
PRIVILEGE AND CONFIDENTIALITY NOTICE <br>
<br>
The information in this electronic mail is intended for the named recipients
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If the reader of this message is not the intended recipient, you are hereby
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</div>
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<p><span style='font-size:10.0pt;color:black'>No virus found in this incoming
message.<br>
Checked by AVG - <a href="http://www.avg.com" target="_blank">http://www.avg.com</a><br>
Version: 8.0.176 / Virus Database: 270.10.1/1869 - Release Date: 1/5/2009 9:44
AM</span><span style='color:black'><o:p></o:p></span></p>
</div>
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<p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:black'><br>
_______________________________________________<br>
cisco-voip mailing list<br>
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<a href="https://puck.nether.net/mailman/listinfo/cisco-voip" target="_blank">https://puck.nether.net/mailman/listinfo/cisco-voip</a><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:black'><br>
<br clear=all>
<br>
-- <br>
Sean Walberg <<a href="mailto:sean@ertw.com" target="_blank">sean@ertw.com</a>>
<a href="http://ertw.com/" target="_blank">http://ertw.com/</a><o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>No virus
found in this incoming message.<br>
Checked by AVG - http://www.avg.com<br>
Version: 8.0.176 / Virus Database: 270.10.1/1869 - Release Date: 1/5/2009 9:44
AM</span><o:p></o:p></p>
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