[asterisk-ss7] Two signaling links same linkset - SLS problem

[Matthew Fredrickson]

Daniel Bichara wrote:
> Dear Matthew,
> 
> Should this new release fix the crash problem I reported on bug ID 11805 
> (running 2 signaling links)?

I'm not sure.  I did not see anything in your back trace that directly 
linked it to libss7, making me wonder if it might be an Asterisk bug, 
but I still have not made any conclusions yet.

Matthew Fredrickson

> 
> []'s
> 
> Daniel
> 
> 
> Matthew Fredrickson escreveu:
>> Daniel Bichara wrote:
>>   
>>> Dear,
>>>
>>> Running 2 signaling links on the same linkset connected to different DPC
>>> produces wrong SLS on STD_TEST and second link did not align:
>>>
>>>                   - Port#1 (PC 1000) <- (quasi-associated) -> SPS 1201 
>>> asterisk (PC 333) -+
>>>                   - Port#2 (PC 2000) <- (quasi-associated) -> SPS 1202
>>>
>>>
>>> SPS 1201 and 1202 are quasi-associated mode SPS. Signaling channels are
>>> on channel 16 on link #1 and #2. SPS 1201 and 1202 are adjacent PC.
>>>
>>> During alignment tests, asterisk sends MSU message (STD_TEST) with SLS=1
>>> to PC 1202. Although, to this PC, SLS should be zero (the same as 1201)
>>> because they are running different PCs.
>>>
>>> If we run second PC as a different linkset (linkset #2), everything goes
>>> fine but we can not start calls on CICs from the other link.
>>>
>>> We are patching libss7 and chan_zap to relate CIC's (PVTs) to the OPC
>>> (333 this case) and not to the linkset. This way, the 2 different
>>> linksets can communicate to the CIC on both links because they run same
>>> OPC (333).
>>>
>>> Any comment or feedback is appreciated.
>>>     
>>
>> I just put in a provisional fix related to this in libss7.  The problem 
>> is that when I did the linkset association in libss7, I had assumed that 
>> when hooking up via multiple redundant links, that they would be within 
>> the same linkset and simply have different SLC codes.
>>
>> To support this configuration in libss7 you must update to the most 
>> recent version which provides a way to support this type of 
>> configuration.  The way it is setup in zapata.conf is the same as if 
>> they were both in the same linkset (so probably the same configuration 
>> as you had before).
>>   
> 
> 
> 
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-- 
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.