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If you see 0 window you must be looking at packet capture.<br>
<br>
In the IP TTL for the 0 window packets, are the TTL consistent with
other frames in the stream? This would confirm the 0 window is coming
from CM and not some interim device such as a firewall or inspection
device.<br>
<br>
Beyond that the only reason I have seen 0 window from CM is byproduct
of a memory leak on the CM server. Do you see indication of increased
VMRss or file descriptors on CM when this happens?<br>
<br>
/Wes<br>
<br>
On Friday, May 21, 2010 11:19:45 AM, Mauro Celli
<a class="moz-txt-link-rfc2396E" href="mailto:mauro.celli@2000net.it"><mauro.celli@2000net.it></a> wrote:<br>
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<div class="Section1">
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal">my remote cucm 6.1 ,sometimes send a TCP
ZeroWindow packet
and my phone stop responding for some times (30sec or 30mins) reboot
and
reconnect.<o:p></o:p></p>
<p class="MsoNormal">If i check “remote device” in phone
configuration
no TCP ZeroWindow appear and phone work well.<o:p></o:p></p>
<p class="MsoNormal">From another site all is ok.<o:p></o:p></p>
<p class="MsoNormal">I have checked my line with download,flood etc..
and it’s
ok, no lost packet…<o:p></o:p></p>
<p class="MsoNormal">Why?<o:p></o:p></p>
<p class="MsoNormal">Thans<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(0, 51, 51);">Cordiali
saluti</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size: 12pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Mauro
Celli</span></b><span
style="font-size: 12pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">
(work in progress...)<o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Site:</span></b><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">
<a moz-do-not-send="true" href="http://www.2000net.it/"><span
style="color: blue;">www.2000net.it</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">13011
Borgosesia (VC) Italy<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Via
XXV Aprile,41<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Tel.
0163.209111<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Fax.
0163 .209301<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);">Supporto
tecnico: 0163 .209561<o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);"
lang="EN-US">Email:</span></b><span
style="font-size: 10pt; font-family: "Times New Roman","serif"; color: rgb(0, 51, 51);"
lang="EN-US"> <a moz-do-not-send="true"
href="mailto:mauro.celli@2000net.it"><span style="color: blue;">mauro.celli@2000net.it</span></a></span><span
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lang="EN-US"><br>
</span><span
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lang="EN-US"><br>
</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><img
id="Immagine_x0020_1" src="cid:part1.03020000.09040707@cisco.com"
alt="cid:image001.gif@01CA32BF.F85A72E0" border="0" height="71"
width="83"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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