All,<div>I'm having an issue with a customer's nextone sbc. They send a call out, I send it to my upstream. My upstream is broken (separate issue althogether). They send me 183..183.. 500. When I get the 500, I send a 503 to the originator of the request (my customer).. and they ignore the request, so I retransmit it 4-5 times.. I'm not doing anything weird. I'm using t_relay for the 503 in a failure route and I'm not rewriting anything other than the original request ruri. No funny business with tags. </div>
<div><br></div><div>During the transaction, other requests replies seem to work:</div><div><div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.793458 62.25.18.34 -> 75.82.100.5 SIP/SDP Request: INVITE <a href="mailto:sip%3A5216161079999@75.82.100.5">sip:5216161079999@75.82.100.5</a>;user=phone, with session description</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.796605 75.82.100.5 -> 62.25.18.34 SIP Status: 100 Giving a try</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.796847 75.82.100.5 -> 202.152.59.3 SIP/SDP Request: INVITE <a href="mailto:sip%3A5216161079999@202.152.59.3">sip:5216161079999@202.152.59.3</a>, with session description</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.822516 202.152.59.3 -> 75.82.100.5 SIP Status: 100 Trying</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.891115 202.152.59.3 -> 75.82.100.5 SIP/SDP Status: 183 Session Progress, with session description</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.892837 75.82.100.5 -> 62.25.18.34 SIP/SDP Status: 183 Session Progress, with session description</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.903312 62.25.18.34 -> 75.82.100.5 SIP Request: PRACK <a href="http://sip:5216161079999@202.152.59.3:5060">sip:5216161079999@202.152.59.3:5060</a></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.905058 75.82.100.5 -> 202.152.59.3 SIP Request: PRACK <a href="http://sip:5216161079999@202.152.59.3:5060">sip:5216161079999@202.152.59.3:5060</a></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.919007 202.152.59.3 -> 75.82.100.5 SIP Status: 200 OK</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 60.919730 75.82.100.5 -> 62.25.18.34 SIP Status: 200 OK</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 66.324643 202.152.59.3 -> 75.82.100.5 SIP Status: 500 Internal Server Error</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 66.325256 75.82.100.5 -> 202.152.59.3 SIP Request: ACK <a href="mailto:sip%3A5216161079999@202.152.59.3">sip:5216161079999@202.152.59.3</a></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 66.326427 75.82.100.5 -> 62.25.18.34 SIP Status: 503 Service Unavailable</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 66.796377 75.82.100.5 -> 62.25.18.34 SIP Status: 503 Service Unavailable</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 67.797229 75.82.100.5 -> 62.25.18.34 SIP Status: 503 Service Unavailable</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 69.798014 75.82.100.5 -> 62.25.18.34 SIP Status: 503 Service Unavailable</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 74.689429 62.25.18.34 -> 75.82.100.5 SIP Request: CANCEL <a href="mailto:sip%3A5216161070241@75.82.100.5">sip:5216161070241@75.82.100.5</a>;user=phone</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"> 74.690889 75.82.100.5 -> 62.25.18.34 SIP Status: 200 canceling</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">
See, that 503 at the bottom doesn't make it through.. </p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Another bit of information. The "To:" header contains a prefix to the RURI. I don't care, I ignore the to header.. The 503 reply ALSO has the To Header. The customer, is telling me that the To: header in the 503 reply needs to match the RURI. I believe that I shouldn't ever touch the To: or From: headers and that they should match exactly what he sent me.</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Any ideas what's going on here? Am I off base?</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">
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