<html><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /></head><body><div><br />I am having some issues with intermittent packet duplication in the network. <br /><br />what this looks like currently is<br />opensips gets 2 identical Invite packets.<br />opensips processes them returning 2 401's with 2 different nonce values.<br /><br />opensips then gets 2 Authed Invite packets<br />processes the first one and invalidates the nonce.<br />another thread is simultaneously processing the other one and sees the invalid nonce and returns a 401.<br />the first thread forwards the valid invite and 100's to the A party and eventual returns a 180 but the A party ignores this because it got a terminal response (401) for that invite.<br /><br /><br />I was wondering is there a mechanism do identify duplicate CSeq numbers in a session so we can drop them in opensips?<br /><br />Yes I am trying to get the source of the duplication identified but it is currently breaking authentication and call setup.<br /><br />Kevin</div><div style="mso-line-height-rule:exactly;-webkit-text-size-adjust:100%;white-space:nowrap;"><br /><table cellpadding="0" cellspacing="0" border="0" style="background-color:#FFFFFF;border-collapse:collapse;font-size:0;line-height:18.33px;"><tr><td align="left" style="padding:0 0 15px;vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:14.67px;color:#808080;font-style:normal;font-weight:bold;text-decoration:none;"><tr><td align="left" style="vertical-align:top;text-align:left;color:#065897;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;">Kevin Stewart</td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:normal;white-space:normal;"> | </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;">Senior VOIP Network Engineer</td></tr></table></td></tr><tr style="line-height:13.33px;"><td align="left" style="padding:0 0 10px;vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:0;"><tr><td align="left" style="vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:10.66px;color:#065897;font-style:normal;font-weight:normal;text-decoration:none;"><tr><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">D: </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href="tel:+64%209%20919%206120" target="_blank" id="LPlnk689713" style="color:#808080;text-decoration:none;"><strong style="font-weight:normal;">+64 9 919 6120</strong></a></td><td align="left" style="vertical-align:top;text-align:left;color:#808080;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;white-space:normal;"> </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">E: </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href="mailto:Kevin.Stewart@vocusgroup.co.nz" target="_blank" id="LPlnk689713" style="color:#808080;text-decoration:underline;"><strong style="font-weight:normal;">Kevin.Stewart@vocusgroup.co.nz</strong></a></td></tr></table></td></tr><tr><td align="left" style="vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:10.66px;color:#065897;font-style:normal;font-weight:normal;text-decoration:none;"><tr><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">M: </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href="tel:+64%2021%20879%20057" target="_blank" id="LPlnk689713" style="color:#808080;text-decoration:none;"><strong style="font-weight:normal;">+64 21 879 057</strong></a></td><td align="left" style="vertical-align:top;text-align:left;color:#808080;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;white-space:normal;"> </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">W: </td><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href="http://vocusgroup.co.nz" target="_blank" id="LPlnk689713" style="color:#808080;text-decoration:underline;"><strong style="font-weight:normal;">vocusgroup.co.nz</strong></a></td></tr></table></td></tr><tr><td align="left" style="vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:10.66px;color:#065897;font-style:normal;font-weight:normal;text-decoration:none;"><tr><td align="left" style="vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">A: </td><td align="left" style="vertical-align:top;text-align:left;color:#808080;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;">Level 4, 191 Queen Street, Auckland 1010</td></tr></table></td></tr></table></td></tr><tr style="line-height:normal;"><td align="left" style="padding:0 0 10px;vertical-align:top;"><table cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;font-size:0;"><tr><td align="center" style="vertical-align:middle;"><a href="http://www.vocusgroup.co.nz" target="_blank" id="LPlnk689713" style="text-decoration:none;"><img src="cid:image584000.png@E4336582.1B3EE040" width="340" height="75" border="0" alt="" style="min-width:340px;font-size:0;" /></a></td></tr></table></td></tr></table><br /></div><span style="font-family:remialcxesans;"> </span></body></html>