<div dir="ltr"><div>If you are using NAT for the Expressway (opposed to giving it a public address which could be a security issue) it is required to purchase the dual nic option.</div><div> </div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Mon, Jun 3, 2013 at 10:52 AM, Gregory Wenzel <span dir="ltr"><<a href="mailto:gwenzel@conres.com" target="_blank">gwenzel@conres.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">I have been watching these emails fly by and don’t quite understand. I recently finished a project where we sold the client Cisco TMS, Cisco VCS and Cisco Expressway,
but we had to purchase the dual-nic option to provide the dual nic to provide the traversal to non-traversal calls.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-family:"Calibri","sans-serif";font-size:11pt">From:</span></b><span style="font-family:"Calibri","sans-serif";font-size:11pt"> cisco-voip [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Erick Wellnitz<br>
<b>Sent:</b> Monday, June 03, 2013 11:44 AM<br>
<b>To:</b> Chris Ward (chrward)<br>
<b>Cc:</b> sheref hf; <a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> Re: [cisco-voip] TP EX90 one way video only<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">IF it is using SIP, without some sort of firewall traversal or proxy the IP in the SIP SDP will show your 192.168.0.50 address of the EX90 and not the public routable address.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">H323 does something similar with ip addressing higher up in the OSI layers which causes issues with some firewalls/NAT devices.<u></u><u></u></p>
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<p style="margin-bottom:12pt" class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Mon, Jun 3, 2013 at 8:30 AM, Chris Ward (chrward) <<a href="mailto:chrward@cisco.com" target="_blank">chrward@cisco.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">It’s most likely the NAT that is causing the issue. You may need to turn on SIP inspection on the
router so that it tries to replace the internal IP with the external IP. Without the inspection, the other unit will be sending video to the internal IP which it can’t real.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">+Chris</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Unity Connection TME</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"> </span><u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-family:"Tahoma","sans-serif";font-size:10pt">From:</span></b><span style="font-family:"Tahoma","sans-serif";font-size:10pt"> cisco-voip [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>sheref hf<br>
<b>Sent:</b> Sunday, June 02, 2013 4:27 AM<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] TP EX90 one way video only</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">Dear all</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">I have TP EX90 with real IP address; I tried to make video call with another TP</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">but we face an issue; they can see me but I can't</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">TP Ex90 ---> LAN ---->Router----> Internet <---- TP Ex90</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">I configured static NAT on router </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">// ip nat inside source static 192.168.0.50 196.2XX.X.XXX</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Comic Sans MS"">Is there any additional configuration to solve this issue??</span><u></u><u></u></p>
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<p style="margin-bottom:12pt" class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Calibri","sans-serif"">Thanks</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(172,25,61);font-family:"Calibri","sans-serif"">BR,<br>
Sherif Ibrahim Moahmed<br>
Network Engineer<br>
CCVP, CCNP</span><u></u><u></u></p>
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