[nsp] [Sip] Vocal Sip stack transmits BYE repeatedly

Thu Nov 6 06:20:16 EST 2003

Hello.

My Server runs on VOCAL SIP stack 1.4 and I have interop problem with Cisco GW.

- Invite arrives from GW to Server and call is established
- Server sends backward BYE to GW
- GW answers with ACK and removes call
- VOCAL  stack sends BYE again and again. 
- GW now answers 481 again and again
- But VOCAL doesn't stop retransmitting. It's stopped after 5 times.

The problem seems to be similar to the bug 425,545 (ACKs for 200OK is not recognized and 200OK is repeated)
May be BYE ACK is also known bug. 
Or there is problem in my BYE? in Cisco BYE ACK?

The same call against AudioCodes GW runs and stops fine. Vocal receives BYE and sends it to application.

This is the call Server - Cisco GW:
=========================

INVITE sip:2100 at 10.10.4.234:5060 SIP/2.0
Via: SIP/2.0/UDP  10.10.10.8:5060
From: <sip:10.10.10.8>;tag=2220F208-D49
To: <sip:2100 at 10.10.4.234>
Date: Mon, 03 Nov 2003 11:16:01 GMT
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
Supported: timer,100rel
Min-SE:  1800
Cisco-Guid: 4042239755-220533208-2382156906-1671752256
User-Agent: Cisco-SIPGateway/IOS-12.x
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO
CSeq: 101 INVITE
Max-Forwards: 6
Remote-Party-ID: <sip:10.10.10.8>;party=calling;screen=no;privacy=off
Timestamp: 1067858161
Contact: <sip:10.10.10.8:5060>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Length: 271

v=0
o=CiscoSystemsSIP-GW-UserAgent 4853 6752 IN IP4 10.10.10.8
s=SIP Call
c=IN IP4 10.10.10.8
t=0 0
m=audio 18286 RTP/AVP 0 101 19
c=IN IP4 10.10.10.8
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:19 CN/8000
a=ptime:20

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 10.10.10.8:5060
To: <sip:2100 at 10.10.4.234>
From: <sip:10.10.10.8>;tag=2220F208-D49
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 101 INVITE
Content-Length: 0

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 10.10.10.8:5060
To: <sip:2100 at 10.10.4.234>
From: <sip:10.10.10.8>;tag=2220F208-D49
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 101 INVITE
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.10.10.8:5060
To: <sip:2100 at 10.10.4.234>;tag=433a0700
From: <sip:10.10.10.8>;tag=2220F208-D49
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 101 INVITE
Contact: <sip:2100 at 10.10.4.234>
Allow: INVITE,BYE,ACK
Content-Type: application/sdp
Content-Length: 228

v=0
o=CiscoSystemsSIP-GW-UserAgent 4853 6752 IN IP4 10.10.4.234
s=SIP Call
c=IN IP4 10.10.4.234
t=0 0
m=audio 4000 RTP/AVP 0 101
c=IN IP4 10.10.4.234
a=rtpmap:0 pcmu/8000
a=rtpmap:101 telephone-event/8000/1
a=ptime:20

ACK sip:2100 at 10.10.4.234:5060 SIP/2.0
Via: SIP/2.0/UDP  10.10.10.8:5060
From: <sip:10.10.10.8>;tag=2220F208-D49
To: <sip:2100 at 10.10.4.234>;tag=433a0700
Date: Mon, 03 Nov 2003 11:16:02 GMT
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
Max-Forwards: 6
Content-Length: 0
CSeq: 101 ACK

BYE sip:10.10.10.8:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.4.234:0
To: <sip:10.10.10.8>;tag=2220F208-D49
From: <sip:2100 at 10.10.4.234>;tag=433a0700
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Max-Forwards: 70
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.10.4.234:0
From: <sip:2100 at 10.10.4.234>;tag=433a0700
To: <sip:10.10.10.8>;tag=2220F208-D49
Date: Mon, 03 Nov 2003 11:16:06 GMT
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
Server: Cisco-SIPGateway/IOS-12.x
Content-Length: 0
CSeq: 102 BYE

BYE sip:10.10.10.8:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.4.234:0
To: <sip:10.10.10.8>;tag=2220F208-D49
From: <sip:2100 at 10.10.4.234>;tag=433a0700
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Max-Forwards: 70
Content-Length: 0

SIP/2.0 481 Call Leg/Transaction Does Not Exist
Via: SIP/2.0/UDP 10.10.4.234:0
From: <sip:2100 at 10.10.4.234>;tag=433a0700
To: <sip:10.10.10.8>;tag=2220F208-D49
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Content-Length: 0

BYE sip:10.10.10.8:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.4.234:0
To: <sip:10.10.10.8>;tag=2220F208-D49
From: <sip:2100 at 10.10.4.234>;tag=433a0700
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Max-Forwards: 70
Content-Length: 0

SIP/2.0 481 Call Leg/Transaction Does Not Exist
Via: SIP/2.0/UDP 10.10.4.234:0
From: <sip:2100 at 10.10.4.234>;tag=433a0700
To: <sip:10.10.10.8>;tag=2220F208-D49
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Content-Length: 0

BYE sip:10.10.10.8:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.4.234:0
To: <sip:10.10.10.8>;tag=2220F208-D49
From: <sip:2100 at 10.10.4.234>;tag=433a0700
Call-ID: F0F18383-D2511D8-8DFFD46A-63A4EA40 at 10.10.10.8
CSeq: 102 BYE
Max-Forwards: 70
Content-Length: 0

...

etc.

It was full call Server - Cisco GW
========================
This is BYE OK sent by AudioCodes GW and successfully accepted by Vocal:

***********AudioCodes GW bye ok**********
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.10.4.234:0
To: <sip:300 at 10.10.4.82>;tag=1c-1141148843
From: <sip:234 at 10.10.4.234>;tag=82b40600
Call-ID: 315381845318453VbiG-300--234 at 10.10.4.82
CSeq: 37502744 BYE
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
Content-Length: 0
***********AudioCodes GW bye ok**********

Thanks
Masha 

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