Re: [SR-Users] ACK and BYE messages uses wrong socket.

3 Jul 2012

Yes, I did the same thing as you mentioned and it still doing the same thing. Here is my
setup:
mhomed=1
listen=udp:x.x.130.36:5060 # external IP
listen=udp:x.x.130.34:5060 # external IP
listen=udp:10.200.1.31:5060 # internal IP

If I removed .130.34, I got error saying no socket found.

Gary Chen
From: sr-users-bounces(a)lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org]
On Behalf Of Vitaliy Aleksandrov
Sent: Tuesday, July 03, 2012 10:27 AM
To: SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List
Subject: Re: [SR-Users] ACK and BYE messages uses wrong socket.

Have you specified interfaces with "listen" command ?
I had a problem as you described and have fixed it by moving a listen directive with a
"floating ip" to the top of the list.
So you can try to specify interfaces you will use for SIP and set a "virtual ip"
at the top of that list.

Kamailio 3.2.0
I am trying to setup kamailio to do the sip trunking. It  receive the sip traffic from
customer and then send it to carrier.
I have two NIC interface's assigned with three IP's:
Interface 1: ( Public IP's)
x.x.130.34
x.x.130.36  floating IP
interface 2: (private IP's)
10.10.1.31

.36 is a floating IP  assigned by Linux-HA (heartbeat/pacemaker).

I only want to use .36 to receive and send sip traffic.
I uses  force_send_socket() to send INVITE with .36 IP.  But the ACK message always want
to use .34 IP even the Route header has .36 in it unless I force it with
force_send_socket() .

How can I fix this problem?
See below for the SIP messages: (x.x.128.205 is customer IP, x.x.129.200 is PSTN gateway
IP)
U x.x.128.205:51694 -> x.x.130.36:5060
  INVITE sip:5033441174@x.x.130.36:5060<mailto:sip:5033441174@x.x.130.36:5060>
SIP/2.0..Via: SIP/2.0/UDP  x.x.128.205:5060;branch=z9hG
  4bK1D3CD1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.3<mailto:sip:5033441174@x.x.130.3>
  6>..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.20<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.20>
  5..Supported: 100rel,timer,replaces..Min-SE:  1800..Cisco-Guid:
411443261-3293254113-3191264919-256
  0877466..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANCEL,
ACK, PRACK, CO
  MET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forwards:
70..Remote-P
  arty-ID:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;party=calling;screen=no;privacy=off..Timestamp:
1341322661
  ..Contact:
<sip:5024427578@x.x.128.205:5060><mailto:sip:5024427578@x.x.128.205:5060>..Expires:
180..Allow-Events: telephone-event..Conte
  nt-Type: application/sdp..Content-Length: 366....v=0..o=CiscoSystemsSIP-GW-UserAgent
9094 579 IN IP
  4 x.x.128.205..s=SIP Call..c=IN IP4 x.x.128.205..t=0 0..m=audio 19312 RTP/AVP 125 0 18
100 10
  1..c=IN IP4 x.x.128.205..a=rtpmap:125 X-CCD/8000..a=rtpmap:0 PCMU/8000..a=rtpmap:18
G729/8000..a
  =fmtp:18 annexb=yes..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=rtpmap:101
telephone-event/8000
  ..a=fmtp:101 0-16..
#
U x.x.130.36:5060 -> x.x.128.205:51694
  SIP/2.0 100 trying -- your call is important to us..Via: SIP/2.0/UDP 
x.x.128.205:5060;branch=z9
  hG4bK1D3CD1;rport=51694..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:502244117
  4@x.x.130.36<mailto:4@x.x.130.36>>..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq>:
101 INVITE..Se
  rver: LVS Proxy 1.0..Content-Length: 0....
#
U x.x.130.36:5060 -> x.x.129.200:5060
  INVITE sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Record-Route: <sip:x.x.130.36;lr=on>..Via: S
  IP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0..Via: SIP/2.0/UDP 
x.x.128.205:5060;rport
  =51694;branch=z9hG4bK1D3CD1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:50224
  41174@x.x.130.36<mailto:41174@x.x.130.36>>..Date: Tue, 03 Jul 2012 13:37:41
GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3
  E39A@x.x.128.205..Supported<mailto:E39A@x.x.128.205..Supported>:
100rel,timer,replaces..Min-SE:  1800..Cisco-Guid: 411443261-3293254
  113-3191264919-2560877466..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE,
OPTIONS, BYE, CANC
  EL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101
INVITE..Max-Forw
  ards: 69..Remote-Party-ID:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;party=calling;screen=no;privacy=off..Tim
  estamp: 1341322661..Contact:
<sip:5024427578@x.x.128.205:51694><mailto:sip:5024427578@x.x.128.205:51694>..Expires:
180..Allow-Events: tel
  ephone-event..Content-Type: application/sdp..Content-Length:
375....v=0..o=CiscoSystemsSIP-GW-UserA
  gent 9094 579 IN IP4 10.200.1.51..s=SIP Call..c=IN IP4 10.200.1.51..t=0 0..m=audio 20464
RTP/AVP 12
  5 0 18 100 101..c=IN IP4 10.200.1.51..a=rtpmap:125 X-CCD/8000..a=rtpmap:0
PCMU/8000..a=rtpmap:18 G7
  29/8000..a=fmtp:18 annexb=yes..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=rtpmap:101
telephone-
  event/8000..a=fmtp:101 0-16..a=nortpproxy:yes..
U x.x.129.200:5060 -> x.x.130.36:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP
x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/UDP  216.4
  9.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088
  -D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue, 03 Jul 2012 13:37:41 GMT..Cal
  l-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp>:
1341322661..Server: Cisco-SIPG
  ateway/IOS-12.x..CSeq: 101 INVITE..Allow-Events: telephone-event..Content-Length: 0....
#
U x.x.129.200:5060 -> x.x.130.36:5060
  SIP/2.0 183 Session Progress..Via: SIP/2.0/UDP
x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/
  UDP  x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;ta
  g=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue, 03 Jul 2012 13:37:4
  1 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp>:
1341322661..Server:
  Cisco-SIPGateway/IOS-12.x..CSeq: 101 INVITE..Require: 100rel..RSeq: 6708..Allow: INVITE,
OPTIONS, B
  YE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE,
REGISTER..Allow-Events: tele
  phone-event..Contact:
<sip:15033441174@x.x.129.200:5060><mailto:sip:15033441174@x.x.129.200:5060>..Record-Route:
<sip:x.x.130.36;lr=on
...
 ..Content-Disposition:
session;handling=required..Content-Type: application/sdp..Content-Length: 2  
90....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2116 IN IP4 x.x.129.200..s=SIP Call..c=IN
IP4 216
  .49.129.200..t=0 0..m=audio 18480 RTP/AVP 0 101 100..c=IN IP4 x.x.129.200..a=rtpmap:0
PCMU/8000.
  .a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=rtpmap:100 X-NSE/8000..a=fmtp:100
192-194..
#
U x.x.130.36:5060 -> x.x.128.205:51694
  SIP/2.0 183 Session Progress..Via: SIP/2.0/UDP 
x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD
  1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F
  0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@216.
  49.128.205..Timestamp: 1341322661..Server: Cisco-SIPGateway/IOS-12.x..CSeq: 101
INVITE..Require: 10
  0rel..RSeq: 6708..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER,
SUBSCRIBE, NOTIFY,
   INFO, UPDATE, REGISTER..Allow-Events: telephone-event..Contact:
<sip:15033441174@x.x.129.200:50<mailto:sip:15033441174@x.x.129.200:50>
  60>..Record-Route: <sip:x.x.130.36;lr=on>..Content-Disposition:
session;handling=required..Conte
  nt-Type: application/sdp..Content-Length: 305....v=0..o=CiscoSystemsSIP-GW-UserAgent
2387 2116 IN I
  P4 x.x.130.66..s=SIP Call..c=IN IP4 x.x.130.66..t=0 0..m=audio 19480 RTP/AVP 0 101
100..c=IN
  IP4 x.x.130.66..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101
0-16..a=rtpm
  ap:100 X-NSE/8000..a=fmtp:100 192-194..a=nortpproxy:yes..
#
U x.x.128.205:51694 -> x.x.130.36:5060
  PRACK sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP  x.x.128.205:5060;branch=z9h
  G4bK1D4474..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130<mailto:sip:5033441174@x.x.130>.
  36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3
  E39A@x.x.128.205..CSeq<mailto:E39A@x.x.128.205..CSeq>: 102 PRACK..RAck: 6708 101
INVITE..Route: <sip:x.x.130.36;lr=on>..Max-
  Forwards: 70..Content-Length: 0....
#
U x.x.130.34:5060 -> x.x.129.200:5060
  PRACK sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bK92c
  e.4def8436.0..Via: SIP/2.0/UDP  x.x.128.205:5060;rport=51694;branch=z9hG4bK1D4474..From:
<sip:50
  24427578@x.x.128.205<mailto:24427578@x.x.128.205>>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Dat
  e: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq>
  : 102 PRACK..RAck: 6708 101 INVITE..Max-Forwards: 69..Content-Length: 0....
#
U x.x.129.200:5060 -> x.x.130.34:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bK92ce.4def8436.0,SIP/2.0/UDP 
x.x.12
  8.205:5060;rport=51694;branch=z9hG4bK1D4474..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59
  ..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue, 03 Jul 2012 13:37:41 GMT..Call-ID
  :
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server>:
Cisco-SIPGateway/IOS-12.x..CSeq: 102
  PRACK..Content-Length: 0....
#
U x.x.130.36:5060 -> x.x.128.205:51694
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 
x.x.128.205:5060;rport=51694;branch=z9hG4bK1D4474..From: <sip:
  5024427578@x.x.128.205<mailto:5024427578@x.x.128.205>>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..D
  ate: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Se<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Se>
  rver: Cisco-SIPGateway/IOS-12.x..CSeq: 102 PRACK..Content-Length: 0....

U x.x.129.200:5060 -> x.x.130.36:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/UDP 
x.x.12
  8.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59
  ..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue, 03 Jul 2012 13:37:41 GMT..Call-ID
  :
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp>:
1341322661..Server: Cisco-SIPGatew
  ay/IOS-12.x..CSeq: 101 INVITE..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET,
REFER, SUBSC
  RIBE, NOTIFY, INFO, UPDATE, REGISTER..Allow-Events: telephone-event..Contact:
<sip:15033441174@216.
  49.129.200:5060>..Record-Route: <sip:x.x.130.36;lr=on>..Content-Type:
application/sdp..Content-L
  ength: 290....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2116 IN IP4 x.x.129.200..s=SIP
Call..c=IN
   IP4 x.x.129.200..t=0 0..m=audio 18480 RTP/AVP 0 101 100..c=IN IP4
x.x.129.200..a=rtpmap:0 PC
  MU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=rtpmap:100
X-NSE/8000..a=fmtp:100 19
  2-194..
#
U x.x.130.36:5060 -> x.x.128.205:51694
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 
x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From: <sip:
  5024427578@x.x.128.205<mailto:5024427578@x.x.128.205>>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..D
  ate: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Ti<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Ti>
  mestamp: 1341322661..Server: Cisco-SIPGateway/IOS-12.x..CSeq: 101 INVITE..Allow: INVITE,
OPTIONS, B
  YE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE,
REGISTER..Allow-Events: tele
  phone-event..Contact:
<sip:15033441174@x.x.129.200:5060><mailto:sip:15033441174@x.x.129.200:5060>..Record-Route:
<sip:x.x.130.36;lr=on
...
 ..Content-Type: application/sdp..Content-Length:
305....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2   116 IN IP4 x.x.130.66..s=SIP
Call..c=IN IP4 x.x.130.66..t=0 0..m=audio 19480 RTP/AVP 0 101 10
  0..c=IN IP4 x.x.130.66..a=rtpmap:0 PCMU/8000..a=rtpmap:101
telephone-event/8000..a=fmtp:101 0-16
  ..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=nortpproxy:yes..
#
U x.x.128.205:51694 -> x.x.130.36:5060
  ACK sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP  x.x.128.205:5060;branch=z9hG4
  bK1D5DA6..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36<mailto:sip:5033441174@x.x.130.36>
...
 ;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41
GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E3  
9A@x.x.128.205<mailto:9A@x.x.128.205>..Route:
<sip:x.x.130.36;lr=on>..Max-Forwards: 70..CSeq: 101 ACK..Content-Lengt
  h: 0....
#
U x.x.130.34:5060 -> x.x.129.200:5060
  ACK sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKcydzi
  gwkX..Via: SIP/2.0/UDP  x.x.128.205:5060;rport=51694;branch=z9hG4bK1D5DA6..From:
<sip:5024427578
  @x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue,
  03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Max-Forwards<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Max-Forwards>
  : 69..CSeq: 101 ACK..Content-Length: 0....
#
U x.x.128.205:51694 -> x.x.130.36:5060
  BYE sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP  x.x.128.205:5060;branch=z9hG4
  bK1D61CE7..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.3<mailto:sip:5033441174@x.x.130.3>
  6>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E
  39A@x.x.128.205..User-Agent<mailto:39A@x.x.128.205..User-Agent>:
Cisco-SIPGateway/IOS-12.x..Max-Forwards: 70..Route: <sip:x.x.130
  .36;lr=on>..Timestamp: 1341322666..CSeq: 103 BYE..Reason:
Q.850;cause=16..Content-Length: 0....
#
U x.x.130.34:5060 -> x.x.129.200:5060
  BYE sip:15033441174@x.x.129.200:5060<mailto:sip:15033441174@x.x.129.200:5060>
SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKa2ce.
  4ba2ee65.0..Via: SIP/2.0/UDP  x.x.128.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From:
<sip:502
  4427578@x.x.128.205<mailto:4427578@x.x.128.205>>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date
  : Tue, 03 Jul 2012 13:37:41 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..User<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..User>-
  Agent: Cisco-SIPGateway/IOS-12.x..Max-Forwards: 69..Timestamp: 1341322666..CSeq: 103
BYE..Reason: Q
  .850;cause=16..Content-Length: 0....
#
U x.x.129.200:5060 -> x.x.130.34:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKa2ce.4ba2ee65.0,SIP/2.0/UDP 
x.x.12
  8.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From:
<sip:5024427578@x.x.128.205><mailto:sip:5024427578@x.x.128.205>;tag=24513088-D5
  9..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date:
Tue, 03 Jul 2012 13:37:46 GMT..Call-I
  D:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server>:
Cisco-SIPGateway/IOS-12.x..Timestamp
  : 1341322666..Content-Length: 0..CSeq: 103 BYE....
#
U x.x.130.36:5060 -> x.x.128.205:51694
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 
x.x.128.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From: <sip
  :5024427578@x.x.128.205>;tag=24513088-D59..To:
<sip:5033441174@x.x.130.36><mailto:sip:5033441174@x.x.130.36>;tag=F0695368-74F..
  Date: Tue, 03 Jul 2012 13:37:46 GMT..Call-ID:
1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..S<mailto:1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..S>
  erver: Cisco-SIPGateway/IOS-12.x..Timestamp: 1341322666..Content-Length: 0..CSeq: 103
BYE....

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Re: [SR-Users] ACK and BYE messages uses wrong socket.