<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I have upgraded from CUCM 7.1(2a) to CUCM 7.1(5b)SU4 without any issues, but now I am having issues loading firmware to my 7921 and 7925 wifi phones through my ASA5520 with the Phone Proxy feature. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here comes the curveball, if I turn on phone-proxy tftp debugs on the ASA everything works normally, but nothing has changed on the ASA so why should this allow tftp to work? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have taken packet captures from both sides of the ASA, without the debug turned on, and the wifi phone just looks like it stops ACK’ing the tftp packets.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does anyone else have a setup similar to mine or has anyone experienced anything like this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>-C<o:p></o:p></p></div></body></html>