[OpenSIPS-Users] multiple retransmissions on 4XX after ACK

[Richard Robson]

Hi Guys,

Not sure if this a problem or normal behaviour or I'm doing something wrong.


after a 4XX is sent and the ACK recieved I can see 3 retransmissions of 
the 4XX message all with corresponding ACKs. Whywould it re transmit 
after an ACK

in the logs in the reply route I only see one. Is there something I 
should be doing or is this normal behaviour. It doesnt do it with BYEs

We are testing with BT next wee and I'd like everything to be shipshape

this is from the carrier to opensips

│INVITE sip:441618501059 at gl-sip-03.greenlightcrm.com SIP/2.
              PSTN CARRIER                       OPENSIPS    
│Record-Route: <sip:109.239.96.133;lr;ftag=0UUHS0000030000E
           ──────────┬───────── 
──────────┬─────────│01001u1J9XWPK0DDUY6X;did=e7f.7bf9fe87>
                     │        INVITE (SDP) │         │Via: SIP/2.0/UDP 
109.239.96.133:5060;branch=z9hG4bK547c.48
   17:42:38.425641   │ ──────────────────────────> │         │a4d4.0
         +0.004634   │      100 Giving a try │         │Via: SIP/2.0/UDP 
194.145.191.131:5060;branch=z9hG4bK00E0F5
   17:42:38.430275   │ <────────────────────────── │         
│0E45333EAEE2FDC3E18D
         +0.105251   │         180 Ringing │         │From: 
<sip:01382250029 at 194.145.191.131>;tag=0UUHS000003000
   17:42:38.535526   │ <────────────────────────── │         
│1D01001u1J9XWPK0DDUY6X
         +0.128720   │         180 Ringing │         │To: 
<sip:441618501059 at 109.239.96.133>
   17:42:38.664246   │ <<<──────────────────────── │         │Call-ID: 
4515e0000ef5-57f7d085-4d7d4603-f256d18-48e7f14 at 12
        +10.118555   │     408 Request Timeout │         │0.0.1
   17:42:48.782801   │ <────────────────────────── │         │CSeq: 
33717 INVITE
         +0.000610   │             ACK │         │Contact: 
<sip:194.145.191.131:5060>
   17:42:48.783411   │ ──────────────────────────> │         
│Allow-Events: refer
         +0.436750   │     408 Request Timeout │         │Allow: INVITE, 
ACK, BYE, CANCEL, OPTIONS, PRACK, INFO, REF
   17:42:49.220161   │ <<<──────────────────────── │         │, NOTIFY, 
SUBSCRIBE, UPDATE
         +0.000636   │             ACK │         │Content-Type: 
application/sdp
   17:42:49.220797   │ ────────────────────────>>> │         
│Max-Forwards: 69
         +1.003961   │     408 Request Timeout │         │Supported: 
timer, replaces, histinfo, 100rel
   17:42:50.224758   │ <<<──────────────────────── │         
│User-Agent: TELES-SBC
         +0.000705   │             ACK │         │Content-Length:   463
   17:42:50.225463   │ ────────────────────────>>> │         │
         +2.005938   │     408 Request Timeout │         │v=0
   17:42:52.231401   │ <<<──────────────────────── │         │o=- 
1890151066 0 IN IP4 194.145.191.134
         +0.000651   │             ACK │         │s=TELES-SBC
   17:42:52.232052   │ ────────────────────────>>> │         │c=IN IP4 
194.145.191.134
                     │ │         │t=0 0
                                                             │

Regards,


-- 
Richard Robson
Greenlight Support
01382 843843
support at greenlightcrm.com