[Users] multiple 487 created

unplug maillisting at gmail.com
Wed Feb 15 11:16:46 CET 2006


Thanks!  But I don't really understand why there is a mismatch between
487and ACK.  Below is a part of sip message pair of 487 and ACK.

Below is the complete log from ngrep.  (From line 290, openser creates
487 and line 304 UA1 ACK.  After that, multiple 487 are created by
openser)
http://meerkat.no-ip.com/openser/cancel_normal.log

Below is my openser.cfg for reference
http://meerkat.no-ip.com/openser/openser.cfg

290 U 203.193.26.226:5060 -> 210.184.23.31:5060
291 SIP/2.0 487 Request Cancelled.
292 Via: SIP/2.0/UDP
10.0.0.46:5060;rport=5060;received=210.184.23.31;branch=z9hG4bKdUyOnG9Zel82UECI.
293 From: "sip:36418488 at o01.ol.com"<sip:871966806561 at o01.ol.com>;tag=xLTdFs7yGkeXq3wn.
294 To: "34163634" <sip:34163634 at o01.ol.com>;tag=A81AFED4-21D7.
295 Date: Tue, 15 Feb 2005 01:52:57 GMT.
296 Call-ID: Z0wcK4WwdTU6mH00 at 10.0.0.46.
297 Server: Cisco-SIPGateway/IOS-12.x.
298 CSeq: 1 INVITE.
299 Allow-Events: telephone-event.
300 Content-Length: 0.
301 .
302
303 #
304 U 210.184.23.31:5060 -> 203.193.26.226:5060
305 ACK sip:34163634 at o01.ol.com SIP/2.0.
306 Via: SIP/2.0/UDP 10.0.0.46:5060;branch=z9hG4bKdUyOnG9Zel82UECI.
307 Route: <sip:34163634 at 203.193.26.226:5060;nat=yes;ftag=xLTdFs7yGkeXq3wn;lr=on>.
308 Max-Forwards: 70.
309 User-Agent: Koncept KE10XX v4.32.10 00-09-45-0a-fc-2d.
310 From: "871966806561" <sip:871966806561 at o01.ol.com>;tag=xLTdFs7yGkeXq3wn.
311 To: "34163634" <sip:34163634 at o01.ol.com>;tag=A81AFED4-21D7.
312 Call-ID: Z0wcK4WwdTU6mH00 at 10.0.0.46.
313 Contact: <sip:871966806561 at 10.0.0.46:5060>.
314 CSeq: 1 ACK.
315 Content-Length: 0.

In my openser.cfg line 184-187, it is remarked.  Do you mean it should
un-remarked for handling ACK according to your point 2?

On 2/15/06, Klaus Darilion <klaus.mailinglists at pernau.at> wrote:
> This means that openser does not receive the ACK or is not able to match
> the ACK to the canceled transaction. Thus it is re-transmitting the 487.
>
> Increas the debug level and take a look at the syslog to find out if:
> 1. the ACK to the 487 is received by openser
> 2. if it is received, check if there is a problem during handling of the
> ACK. (for these kind of ACKs just t_relay()).
>
> klaus
>
> On Wed, February 15, 2006 5:13, unplug said:
> > For the normal cancel situation.
> >
> > UA1           OPENSER         UA2
> > --------INVITE----------------->
> > <-----------100-----------------
> >                   --------------------INVITE---------->
> >                   <---------------100-------------------
> > ----------CANCEL---------->
> >                   --------------CANCEL------------->
> >                  <--------------200------------------
> >                 <------------487-------------------
> >                  --------------ACK----------------->
> > <---------487---------------
> > -------------ACK------------>
> >
> > But in my case, I found that there are many 487 created from openser
> > to UA1.  The multiple 487 may cause a call drop in the following call.
> >  Why does openser create so many 487 for UA1?  How can I prevent it?
> >
> > UA1           OPENSER         UA2
> > --------INVITE----------------->
> > <-----------100-----------------
> >                   --------------------INVITE---------->
> >                   <---------------100-------------------
> > ----------CANCEL---------->
> >                   --------------CANCEL------------->
> >                  <--------------200------------------
> >                 <------------487-------------------
> >                  --------------ACK----------------->
> > <---------487---------------
> > -------------ACK------------>
> > <---------487-------------
> > -------------ACK------------>
> > <---------487---------------
> > -------------ACK------------>
> > <---------487-------------
> > -------------ACK------------>
> > <---------487-------------
> > -------------ACK------------>
> > <---------487-------------
> > -------------ACK------------>
> > <---------487-------------
> > -------------ACK------------>
> > ...
> >
> > _______________________________________________
> > Users mailing list
> > Users at openser.org
> > http://openser.org/cgi-bin/mailman/listinfo/users
> >
>
>
>




More information about the Users mailing list