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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Dan,<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'>Do you happen to have your MoH sources plugged into a 6500 with
a Sup2 with MSFC2? Does the MSFC2 happen to be your RP? Do you happen to have
a CMM in the same chassis?<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'>We ran into this problem and TAC was not able to resolve it. We
moved our MoH sources and RP to a 6500 with a Sup32 in it and it worked as
designed.<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'>-C<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>
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<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"'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b>On
Behalf Of </b>Daniel<br>
<b>Sent:</b> Wednesday, June 24, 2009 2:46 AM<br>
<b>To:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> [cisco-voip] Multicast MoH Delay<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Hi All,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>I've setup multicast routing for music on hold between our
data centre network and building floor subnets. The setup is that the data
centre is on a different subnet and gear to the floor subnets so multicast
routing needs to be used to get MoH packets to the phones.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>This consists of the following traffic flow,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>MoH Server > Access Switch > Distribution
Switch/router(RP) > Distribution Switch/router > Floor Switches > Phones<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>There are three routing hops (1) from vlan interface to
routed interfaces of distribution switch (2) between Distribution and (3) from
routed interface of distributionswitch to phone vlan interface. Only the
distribution switches are layer 3.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>The first distribution switch is the RP for the group and
only that group.The second distribution switch is accepting auto RP only. We
are using sparse mode.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Multicast traffic is working, the RP mappings are there, the
mroute is there, the problem is that when a call is placed on hold there is a 5
second delay before the music is heard. I assume this to be somewhat because of
the join message and the delay of the route or path being setup.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Anyone know of a way to reduce the delay before music is
heard? If not I guess its back to the lab.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>regards,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Dan<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
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