[asterisk-ss7] MTP Link Down SLC (0) SLC (1)

Wed Feb 15 04:02:24 CST 2012

Hi,

On Wed, 15 Feb 2012 12:53:15 +0530, Bharat Lalcheta
<bharatlalcheta at gmail.com> wrote:
> No i m not getting BAD FCS HDLC abort. In dahdi i m getting following 2
> messages.
> 
> REL on channel (CIC 113) without owner!  This message i m getting on
first
> server too.
> 
> But below message came on the problematic server whenever mtp2 link down
> message come
> 
> Duplicate IAM requested on CIC 2
> 

try to switch from mtp2 to dchan in system.conf i saw duplicate messages
using mtp2, but this is unlikely the main problem
check the cables, switch the (links on the) two machines if possible

> 
> 
> On Wed, Feb 15, 2012 at 12:39 PM, Vashkar Chatterjee
> <vashkar at gmail.com>wrote:
> 
>> Check transmission for faults.  Do you get BAD FCS HDLC abort?  Check
for
>> the line error, code violation etc from dahdi maint tool
>>
>> -Vashkar
>> On Feb 15, 2012 1:04 PM, "Bharat Lalcheta" <bharatlalcheta at gmail.com>
>> wrote:
>>
>>> Thanks for reply.
>>> Telco enabled crc and first server working fine on it.
>>>
>>> On Wed, Feb 15, 2012 at 12:24 PM, Vashkar Chatterjee
>>> <vashkar at gmail.com>wrote:
>>>
>>>> Checm if telco had crc enabled or not. If not turn off crc
>>>> On Feb 15, 2012 12:45 PM, "Bharat Lalcheta"
<bharatlalcheta at gmail.com>
>>>> wrote:
>>>>
>>>>> Hii,
>>>>>
>>>>> I have 2 servers with dual core 3 GHz dual cpu with 2 GB RAM and
>>>>> having
>>>>> 2 * TE410P digium, total 8 port for inbound calling.
>>>>>
>>>>> using asterisk-1.6.2.9, dahdi-2.5, libss7 SVN latest version
>>>>>
>>>>> Both server has same setup, 8 E1's with 2 Signalling channels from
>>>>> same
>>>>> telco.
>>>>>
>>>>> follwoing is chan_dahdi.conf
>>>>>
>>>>> [channels]
>>>>> group=0
>>>>> linkset = 1
>>>>> signalling = ss7
>>>>> ss7type = itu
>>>>> ss7_called_nai=national
>>>>> ss7_calling_nai=national
>>>>> context=ivrs
>>>>> pointcode = 2
>>>>> adjpointcode = XXXXX
>>>>> defaultdpc = XXXXX
>>>>> networkindicator=national
>>>>> sigchan = 16
>>>>> cicbeginswith=1
>>>>> channel = 1-15
>>>>> cicbeginswith = 17
>>>>> channel = 17-31
>>>>> sigchan = 47
>>>>> cicbeginswith = 33
>>>>> channel = 32-46
>>>>> cicbeginswith = 49
>>>>> channel = 48-62
>>>>> cicbeginswith = 65
>>>>> channel = 63-93
>>>>> cicbeginswith = 97
>>>>> channel = 94-124
>>>>> cicbeginswith = 129
>>>>> channel = 125-155
>>>>> cicbeginswith = 161
>>>>> channel = 156-186
>>>>> cicbeginswith = 193
>>>>> channel = 187-217
>>>>> cicbeginswith = 225
>>>>> channel = 218-248

preferably move the sigchan definitions here after all channels and you
may also need to define slc for each of them

>>>>> following is the system.conf
>>>>>
>>>>> span=1,1,0,ccs,hdb3,crc4
>>>>> bchan=1-15,17-31
>>>>> mtp2=16
>>>>> span=2,2,0,ccs,hdb3,crc4
>>>>> bchan=32-46,48-62
>>>>> mtp2=47
>>>>> span=3,3,0,ccs,hdb3,crc4
>>>>> bchan=63-93
>>>>> span=4,4,0,ccs,hdb3,crc4
>>>>> bchan=94-124
>>>>> span=5,5,0,ccs,hdb3,crc4
>>>>> bchan=125-155
>>>>> span=6,6,0,ccs,hdb3,crc4
>>>>> bchan=156-186
>>>>> span=7,7,0,ccs,hdb3,crc4
>>>>> bchan=187-217
>>>>> span=8,8,0,ccs,hdb3,crc4
>>>>> bchan=218-248
>>>>> span=9,9,0,ccs,hdb3,crc4
>>>>> bchan=249-279
>>>>> span=10,10,0,ccs,hdb3,crc4
>>>>> bchan=280-310
>>>>> span=11,11,0,ccs,hdb3,crc4
>>>>> bchan=311-341
>>>>> span=12,12,0,ccs,hdb3,crc4
>>>>> bchan=342-372
>>>>> loadzone        = in
>>>>> defaultzone     = in
>>>>>
>>>>> Now one server working fine with 8 E1s in regular or heavy traffic
of
>>>>> inbound.
>>>>>
>>>>> But in second server, its giving following warning at every 8-10
>>>>> minutes
>>>>> [Feb 15 12:04:52] WARNING[13950] chan_dahdi.c: MTP2 link down (SLC
1)
>>>>> [Feb 15 12:04:52] WARNING[13950] chan_dahdi.c: MTP2 link down (SLC
0)
>>>>> Also when traffic is high, i.e. more than 220-230 calls, suddenly
all
>>>>> calls get disconnected at same time. No other warning or error at
that
>>>>> time, only above MTP2 link down message there. No flactuation in E1
>>>>> media
>>>>> at my side or telco side.
>>>>>
>>>>> Please guide me to solve above problem.
>>>>>
>>>>>
>>>>> Bharat Lalcheta
>>>>>
>>>>> --
>>>>>
_____________________________________________________________________
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>>>>>
>>>>
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>>>
>>>
>>>
>>> --
>>> Bharat Lalcheta
>>>
>>> --
>>> _____________________________________________________________________
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>>
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