<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">It is possible. It seems a little less likely. CM is involved in call setup and then largely out of the picture.<div><br></div><div>I can imagine a way that server performance would impact an active call:</div><div>* call is setup between h.323 gateway and sccp phone</div><div>* media is directly between phone and gateway</div><div>* keepalives still occur on the signaling channels between phone and cm and gw and cm</div><div>* server performance degrades so keepalives are dropped or otherwise not processed</div><div>* phone or gateway signaling session aborts</div><div>* because it is h.323 call preservation is disabled by default. When the signaling session aborts the call is dropped.</div><div><br></div><div>This would appear in CDR's with cause codes in the 40's range like 41 and 47.</div><div><br></div><div>here is a sample of CDR aggregation from a cluster that experienced this exact issue:</div><div><br></div><div><div><font class="Apple-style-span" face="Monaco">+--------------------+-----------------+----------+</font></div><div><font class="Apple-style-span" face="Monaco">| destdevicename | destcause_value | count(*) |</font></div><div><font class="Apple-style-span" face="Monaco">+--------------------+-----------------+----------+</font></div><div><font class="Apple-style-span" face="Monaco">| ICT-Development | 41 | 6 |</font></div><div><font class="Apple-style-span" face="Monaco">| ICT-site1 | 41 | 74 |</font></div><div><font class="Apple-style-span" face="Monaco">| ICT-site1 | 47 | 2351 |</font></div><div><font class="Apple-style-span" face="Monaco">| ICT-site2 | 41 | 3 |</font></div></div><div><br></div><div>In this case packets were dropping in the WAN between this site and site1.</div><div><br></div><div>Regards,</div><div>Wes</div><div><br></div><div><br><div><div>On May 9, 2012, at 10:32 AM, Damian Turburville wrote:</div><br class="Apple-interchange-newline"><div><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Cheers Wes and Kiran,</span></div><div><span>On a possibly related note our Publisher server has started popping up Virtual Memory errors as copied below<br></span></div><div><br><span></span></div><div><span>Available virtual memory below 30 Percent.<br>tomcat (884 MB) uses most of the memory.</span></div><div><br><span></span></div><div><span>Could this be related? Is it something major that needs to be sorted?</span></div><div><span>Cheers,</span></div><div><span>DT<br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Wes Sisk <<a href="mailto:wsisk@cisco.com">wsisk@cisco.com</a>><br>
<b><span style="font-weight: bold;">To:</span></b> Damian Turburville <<a href="mailto:d_turburville@yahoo.com">d_turburville@yahoo.com</a>> <br><b><span style="font-weight: bold;">Cc:</span></b> "<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>" <<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, 3 May 2012, 16:08<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [cisco-voip] Dropped calls on CUCM 6.1 cluster<br> </font> </div> <br><div id="yiv1520547518"><div>Maybe something like this:<div>Dropped Call Troubleshooting in CUCM</div><div><a rel="nofollow" target="_blank" href="https://supportforums.cisco.com/docs/DOC-1208">https://supportforums.cisco.com/docs/DOC-1208</a></div><div><br></div><div>Regards,</div><div>Wes</div><div><br><div><div>On May 3, 2012, at 4:34 AM, Damian Turburville wrote:</div><br class="yiv1520547518Apple-interchange-newline"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times,
serif;font-size:12pt;"><div>Hi,</div><div>We are getting calls disconnected mid-call on random handsets in our CUCM 6.1 cluster( 1 pub 2 subs), actually it seems to be phones on one particular subscriber that are experiencing the issue but that might be a red herring. The users say it is happening on all types of calls but we are trying to get more detailed info from them atm.<br></div><div>Does anyone have any ideas how can I start to track this down? Please be as basic as possible so I can understand :-)</div><div>Many thanks,</div><div>DT</div></div></div>_______________________________________________<br>cisco-voip mailing list<br><a rel="nofollow" ymailto="mailto:cisco-voip@puck.nether.net" target="_blank" href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a><br></div><br></div></div></div><br><br> </div> </div> </div></div></div><br></div></body></html>