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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">When deciding whether to venture into unsupported territory, I think it is worth distinguishing between different types of “unsupported.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">One type of “unsupported” is when a vendor says certain pieces must be certain things and at certain versions, but you choose to go
against their requirement.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Another type of “unsupported” is when a vendor declares that they are discontinuing all maintenance/development on a certain piece
and that it must be migrated away from immediately.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Your situation is both. Cisco says browser must be a certain flavour/version to work with their particular solution, *and* Microsoft
told EVERYBODY to get off IE9 months ago.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">There are lots of environments where intentionally going “unsupported” is an acceptable risk, but IMO mixing both types of unsupported
simultaneously is probably asking for trouble in almost all cases.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">-mn<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> cisco-voip [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Anthony Holloway<br>
<b>Sent:</b> May-12-16 10:07 AM<br>
<b>To:</b> Cisco VoIP Group <cisco-voip@puck.nether.net><br>
<b>Subject:</b> [cisco-voip] How Important is Running "Supported?"<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">All,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Over the past 10 years, I have seen a multitude of deployments that were not in a 100% supported configuration. Most of the time, this simply results in "don't ask, don't tell" and as long as you didn't need TAC support, everything should
be fine. I don't necessarily mean UCCX server compatibility with CUCM, but like phone models, firmware, IOS code, gateway models, web browsers, OS, Agent shared lines or LG membership, etc.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Well, recently I just ran into a non-supported setup, where it caused the server to hit 100% CPU utilization and cause all sorts of problems in the application.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It was UCCX v11 and using IE9 for Finesse.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">You can read more about the difference in the browser here, if you have access:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://communities.cisco.com/message/215058/">https://communities.cisco.com/message/215058/</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Otherwise the summary is basically this:<o:p></o:p></p>
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<p class="MsoNormal">UCCX v11 introduced a new technology to support Live Data feeds from Finesse to CUIC:
<a href="http://Socket.IO">Socket.IOhttp://socket.io/</a>. Socket.IO uses <a href="https://en.wikipedia.org/wiki/WebSocket">
HTTP WebSockets</a> to open a single TCP connection from Finesse to UCCX, and then passes all updates to the data via this single connection.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">IE9 lacks the feature to support WebSockets and the Socket.IO software automatically allows older browser clients to
<a href="http://stackoverflow.com/questions/12993704/ie-and-socket-io-compatibility">
fallback to single HTTP GET</a> calls for each data refresh interval.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This means that instead of having 100 Agents using 1 socket each, for a total of 100 connections that are persistent, you'll end up 100 Agents using hundreds of connections (quickly setup and then closed) throughout the day, resulting in
what is essentially a DoS attack on the SocketIO service.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In theory, this would happen with any browser that doesn't support WebSockets.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So, how important is being in compliance when it comes to what's supported and not supported? Do you typically bend the rules, or are you rigid and strict?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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