[Freeswitch-users] B-Leg / A-Leg Race Condition

Fri Aug 31 23:59:36 MSD 2012

Cool I will nail that up on my test box and see if that works

Thanks for the suggestion

Sent from my iPhone 4S

On Aug 31, 2012, at 12:50 PM, Anthony Minessale <anthony.minessale at gmail.com> wrote:

> An idea I had you can test if you update to latest
> 
> set the variable sip_wait_for_aleg_ack on the b leg in the {} when you
> make the outbound call
> 
> <action application="bridge"
> data="{sip_wait_for_aleg_ack=true}sofia/internal/foo at bar.com"/>
> 
> In theory this should make the B leg delay sending the ACK until it
> sees that the A leg has recv'd an ack
> 
> 
> 
> On Fri, Aug 31, 2012 at 2:33 PM, Mike Burlingame <mike.burlingame at me.com> wrote:
>> I do have an OpenSIPs proxy in front of and behind the A and B Leg's - but
>> the issue still seems to be in FS
>> 
>> Sonus_UAC --> OpenSIPs --> Freeswitch --> OpenSIPs --> Broadsoft_M6
>> 
>> Log and SIP trace from FS Log file posted to PasteBin:
>> http://pastebin.freeswitch.org/19799
>> 
>> 
>> On Aug 31, 2012, at 12:14 AM, SamyGo <govoiper at gmail.com> wrote:
>> 
>> Well that narrow downs the possible solutions to doing some stuff on FS only
>> ! - I really think that Stopping or applying a work-around for the re-invite
>> from Broadsoft will get this fixed. I did some googling on the SIP 491 code
>> and re-invites in FS and mostly they point to session timers or some
>> media_bridging option in dialplan.
>> 
>> 
>> On Fri, Aug 31, 2012 at 12:03 PM, Mike Burlingame <mike.burlingame at me.com>
>> wrote:
>>> 
>>> The Sonus and M6 are out of my control they belong to my upstream and
>>> downstream so I have no access to them
>>> 
>>> Broadsoft support will not work this issue because FS ACKs the 200 OK so
>>> dialog is completed at least on the B-Leg so that's when the M6 sends the
>>> 2nd invite however the dialog has not completed on the A-Leg but FS still
>>> passes the Invite along resulting in the 491
>>> 
>>> 
>>> Sent from my iPhone 4S
>>> 
>>> On Aug 30, 2012, at 11:42 PM, SamyGo <govoiper at gmail.com> wrote:
>>> 
>>> OK, and can you see whats happening inside the SONUS when it gets the
>>> second invite (debug logs etc)? Can you control the M6 to stop re-invites !?
>>> 
>>> On Fri, Aug 31, 2012 at 10:29 AM, Mike Burlingame <mike.burlingame at me.com>
>>> wrote:
>>>> 
>>>> Sure I will put logs and sip dump up tomorrow A-Leg == Sonus B-Leg ==
>>>> Broadsoft M6
>>>> 
>>>> Sent from my iPhone 4S
>>>> 
>>>> On Aug 30, 2012, at 10:24 PM, SamyGo <govoiper at gmail.com> wrote:
>>>> 
>>>> Hi,
>>>> Can you please manage a proper sip trace for this ! I'd really love to
>>>> troubleshoot and analyse the sip traces.
>>>> What is the equipment on your A-leg ?
>>>> 
>>>> BR
>>>> Sammy
>>>> 
>>>> 
>>>> 
>>>> On Fri, Aug 31, 2012 at 3:28 AM, Mike Burlingame <mike.burlingame at me.com>
>>>> wrote:
>>>>> 
>>>>> I would like to add an update to this and maybe someone has some other
>>>>> suggestions - It does look like that FS is disconnecting the call with cause
>>>>> code 31  [NORMAL_UNSPECIFIED] I did not notice the time stamp difference on
>>>>> the Bye when I first looked at the log's
>>>>> 
>>>>> The basis of the issue still stands a 491 Results in the B-Leg being
>>>>> disconnected
>>>>> 
>>>>> On Aug 24, 2012, at 12:53 PM, Mike Burlingame <mike.burlingame at me.com>
>>>>> wrote:
>>>>> 
>>>>> We are seeing some instances when we send a invite from the B-Leg back
>>>>> to FS and FS passes the invite to the A-Leg that the dialog on the A-Leg has
>>>>> not fully completed yet causing a return of a 491 from the A-Leg side
>>>>> causing the call to be disconnected. wanted to see if anyone else has seen
>>>>> something like this while running FS and if anyone had any suggestions on a
>>>>> fix?
>>>>> 
>>>>> A-Leg
>>>>> Invite into Freeswitch
>>>>> 100 Trying back from FS to A-Leg
>>>>> 180 Ringing from FS to A-Leg
>>>>> 200 OK from FS to A-Leg at 15:08:14.638799
>>>>> Invite from FS to A-Leg (From B-Leg below) at 15:08:14.749515
>>>>> 100 Giving a try form A-Leg to FS at 15:08:14.749757
>>>>> 491 From A-Leg to FS at 15:08:14.780968
>>>>> ACK from FS to A-Leg at 15:08:14.781102
>>>>> ACK from FS to A-Leg at 15:08:14.797143
>>>>> BYE from A-LEG to FS 15:11:10.791963
>>>>> 
>>>>>   481 Call Does Not Exist back to A-LEG
>>>>> 
>>>>> 
>>>>> B-Leg
>>>>> Invite from Freeswitch to B-Leg
>>>>> 100 Giving a try from B-Leg
>>>>> 180 Ringing from B-Leg
>>>>> 200 OK  from B-Leg at 15:08:14.635670
>>>>> ACK from FS to B-Leg  at 15:08:14.637044
>>>>> Invite from B-Leg to FS at 15:08:14.748623
>>>>> 100 Trying from FS to B-Leg at 15:08:14.748954
>>>>> 491 from FS to B-Leg at 15:08:14.782169
>>>>> ACK from B-Leg to FS at 15:08:14.782372
>>>>> BYE from FS to B-Leg at 15:08:14.790714 with Cause Code 31
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> _________________________________________________________________________
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>>>>> 
>>>>> 
>>>>> 
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>>>> 
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>> 
>> _________________________________________________________________________
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>> http://www.freeswitchsolutions.com
>> 
>> 
>> 
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>> 
>> 
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>> 
>> 
>> 
>> 
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> 
> 
> 
> -- 
> Anthony Minessale II
> 
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> 
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