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[ahgindia308 at gmail.com]

Recently I noticed that fs (1.0.3 RC1) is not processing the calls.
Previously about 50-60 calls were remaining active at any time. But then
suddenly, only 5-6 active calls were there. So I checked sip INVITE's in
ngrep, and I noticed that originator were sending CANCEL after INVITE. So I
contacted them and they were telling that while sending calls, your gateways
time outs after a call is sent, and so they send CANCEL after INVITE.

My architecture is as follows :
originator -> switch (our fs) -> terminator.
CPU : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz
OS : Ubuntu 6.06.1 LTS 32-bit
RAM : 4 GB
We had also set ulimits on command prompt every time before starting fs with
nc mode as follows :
ulimit -c unlimited; ulimit -n 999999; ulimit -s 244;
/usr/local/freeswitch/bin/freeswitch -nc

In the ngrep trace, I noticed that fs was not sending INVITE to terminator
in between the INVITE and CANCEL from originator. So what could be the
reason for INVITE not being processed by fs and getting timeout from
originator.

Here is the sip trace for a sample call. Check the duration between INVITE
and CANCEL from originator.
--------------------------------------------------------------------
U 2009/02/07 13:16:44.354443 ori.ori.ori.ori:2000 -> fs.fs.fs.fs:5060
INVITE sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone SIP/2.0.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>.
Content-Type: application/sdp.
CSeq: 1 INVITE.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
Contact: sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone.
Allow: INVITE,CANCEL,BYE,ACK,REFER,UPDATE,INFO.
Supported: timer,100rel.
Max-Forwards: 70.
Content-Length: 317.
.
v=0.
o=MG4000|2.0 492612 492612 IN IP4 66.151.208.138.
s=-.
c=IN IP4 66.151.208.138.
t=0 0.
m=audio 38832 RTP/AVP 97 18 98 96 101 13.
a=rtpmap:97 G.729b/8000.
a=rtpmap:98 G.729a/8000.
a=rtpmap:96 G.729ab/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=fmtp:18 annexb=yes.
a=ptime:20.
a=rtpmap:13 CN/8000.

#
U 2009/02/07 13:16:44.354633 fs.fs.fs.fs:5060 -> ori.ori.ori.ori:2000
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
CSeq: 1 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-hacked.
Content-Length: 0.

U 2009/02/07 13:16:59.208008 ori.ori.ori.ori:2000 -> fs.fs.fs.fs:5060
CANCEL sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone SIP/2.0.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>.
CSeq: 1 CANCEL.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
Supported: timer,100rel.
Max-Forwards: 70.
Content-Length: 0.
.

#
U 2009/02/07 13:16:59.208095 fs.fs.fs.fs:5060 -> ori.ori.ori.ori:2000
SIP/2.0 200 OK.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>;tag=7B6p78S5SDF0j.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
CSeq: 1 CANCEL.
Content-Length: 0.
.

#
U 2009/02/07 13:16:59.208134 fs.fs.fs.fs:5060 -> ori.ori.ori.ori:2000
SIP/2.0 487 Request Terminated.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>;tag=7B6p78S5SDF0j.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
CSeq: 1 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-hacked.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY,
REFER, UPDATE, REGISTER, INFO, PUBLISH.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, presence, dialog, call-info, sla,
include-session-description, presence.winfo, message-summary, refer.
Content-Length: 0.

U 2009/02/07 13:16:59.253482 ori.ori.ori.ori:2000 -> fs.fs.fs.fs:5060
ACK sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone SIP/2.0.
Call-ID: 7008117790783130205-1234012604@ori.ori.ori.ori.
From: <sip:xxxxxxxxxxx@ori.ori.ori.ori:2000;user=phone>;tag=13475.
To: <sip:yyyyyyyyyyyy@fs.fs.fs.fs:5060;user=phone>;tag=7B6p78S5SDF0j.
CSeq: 1 ACK.
Via: SIP/2.0/UDP
ori.ori.ori.ori:2000;branch=z9hG4bK-6141d60007b94a5d-4297d09d-1.
Max-Forwards: 70.
Content-Length: 0.
-------------------------------------------------------
--
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