Hi All.<br>
<br>
Below is a SIP call log when a user dialed *98 which doesn't exist. So
SER properly replied with a 404 and the SIP UA ACKed it, but then SER
did something very strange -- it attempted to send the ACK to itself
and caused a loop.<br>
<br>
I cannot understand why. SER only does this occasionally.<br>
<br>
Am I missing something?<br>
Regards,<br>
Paul<br>
<br>
U 2005/04/09 15:06:17.652209 <a href="http://69.164.35.165:5060">69.164.35.165:5060</a> -> <a href="http://10.3.0.221:5060">10.3.0.221:5060</a><br>
INVITE <a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a> SIP/2.0.<br>
Via: SIP/2.0/UDP <a href="http://69.164.35.165:5060">69.164.35.165:5060</a>;branch=z9hG4bK3099039843.<br>
From: Demo User <<a href="mailto:sip:3212514237@sipdev.mycompany.com">sip:3212514237@sipdev.mycompany.com</a>>;tag=834547832.<br>
To: <<a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a>>.<br>
Call-ID: <a href="mailto:2364611513@69.164.35.165">2364611513@69.164.35.165</a>.<br>
CSeq: 1301 INVITE.<br>
Contact: <sip:3212514237@69.164.35.165:5060>.<br>
Proxy-Authorization: Digest username="3212514237",
realm="<a href="http://sipdev.mycompany.com">sipdev.mycompany.com</a>",
nonce="425828d534596342b1ca79431668dc1f45f1d8e8",
uri="<a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a>",
response="397365c1a896effa0671df07b27d3e39", algorithm=MD5,
cnonce="9bd3799c3cdd94cb2204901c2db4ff8b", qop=auth, nc=0000020a.<br>
max-forwards: 70.<br>
Allow: INVITE, ACK, CANCEL, BYE, REFER, NOTIFY.<br>
Content-Type: application/sdp.<br>
Content-Length: 178.<br>
.<br>
v=0.<br>
o=- 674 3207 IN IP4 <a href="http://69.164.35.165">69.164.35.165</a>.<br>
s=-.<br>
c=IN IP4 <a href="http://69.164.35.165">69.164.35.165</a>.<br>
t=0 0.<br>
m=audio 13456 RTP/AVP 18 0 8 2 4 101.<br>
a=rtpmap:101 telephone-event/8000.<br>
a=fmtp:101 0-15.<br>
a=ptime:20.<br>
<br>
#<br>
U 2005/04/09 15:06:17.658659 <a href="http://10.3.0.221:5060">10.3.0.221:5060</a> -> <a href="http://69.164.35.165:5060">69.164.35.165:5060</a><br>
SIP/2.0 404 User Not Found.<br>
Via: SIP/2.0/UDP <a href="http://69.164.35.165:5060">69.164.35.165:5060</a>;branch=z9hG4bK3099039843.<br>
From: Demo User <<a href="mailto:sip:3212514237@sipdev.mycompany.com">sip:3212514237@sipdev.mycompany.com</a>>;tag=834547832.<br>
To: <<a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a>>;tag=cdbfe46960d7566fcbe09f199f2b328d.2395.<br>
Call-ID: <a href="mailto:2364611513@69.164.35.165">2364611513@69.164.35.165</a>.<br>
CSeq: 1301 INVITE.<br>
Content-Length: 0.<br>
<br>
#<br>
U 2005/04/09 15:06:26.995837 <a href="http://69.164.35.165:5060">69.164.35.165:5060</a> -> <a href="http://10.3.0.221:5060">10.3.0.221:5060</a><br>
ACK <a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a> SIP/2.0.<br>
Via: SIP/2.0/UDP <a href="http://69.164.35.165:5060">69.164.35.165:5060</a>;branch=z9hG4bK3099039843.<br>
From: Demo User <<a href="mailto:sip:3212514237@sipdev.mycompany.com">sip:3212514237@sipdev.mycompany.com</a>>;tag=834547832.<br>
To: <<a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a>>;tag=cdbfe46960d7566fcbe09f199f2b328d.2395.<br>
Call-ID: <a href="mailto:2364611513@69.164.35.165">2364611513@69.164.35.165</a>.<br>
CSeq: 1301 ACK.<br>
Content-Length: 0.<br>
.<br>
<br>
#<br>
U 2005/04/09 15:06:27.230645 <a href="http://10.3.0.221:5060">10.3.0.221:5060</a> -> <a href="http://10.3.0.221:5060">10.3.0.221:5060</a><br>
ACK <a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a> SIP/2.0.<br>
Max-Forwards: 10.<br>
Record-Route: <sip:<a href="http://10.3.0.221">10.3.0.221</a>;ftag=834547832;lr>.<br>
Via: SIP/2.0/UDP <a href="http://10.3.0.221">10.3.0.221</a>;branch=0.<br>
Via: SIP/2.0/UDP <a href="http://69.164.35.165:5060">69.164.35.165:5060</a>;branch=z9hG4bK3099039843.<br>
From: Demo User <<a href="mailto:sip:3212514237@sipdev.mycompany.com">sip:3212514237@sipdev.mycompany.com</a>>;tag=834547832.<br>
To: <<a href="mailto:sip:*98@sipdev.mycompany.com">sip:*98@sipdev.mycompany.com</a>>;tag=cdbfe46960d7566fcbe09f199f2b328d.2395.<br>
Call-ID: <a href="mailto:2364611513@69.164.35.165">2364611513@69.164.35.165</a>.<br>
CSeq: 1301 ACK.<br>
Content-Length: 0.<br>
P-hint: Local Destination.<br>
<br>