Get a trace of mtp2 messages.
I will guess that one of the sides aree not reesponding correctly and you a link reset on Timer.
Jan
From: linuxgurus@xxxxxxxxx
To: asterisk-ss7 at lists.digium.com
Date: Fri, 5 Mar 2010 18:58:44 +0500
Subject: SS7 Link Problem
Dear All,
I am facing an issue with ss7. I don?t understand why SS7 link break every 15 to 30 sec. A quick response needed from your side. Please see the below output and config files.
[root at asterisk ~]# tail -f /var/log/asterisk/messages
[Mar 5 03:06:16] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:06:23] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:06:32] NOTICE[19999] chan_sip.c: Registration from '<sip:1114 at 192.168.5.252:5060>' failed for '192.168.5.253' - No matching peer found
[Mar 5 03:06:42] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:06:48] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:06:55] WARNING[19978] chan_dahdi.c: REL on channel (CIC 30) without owner!
[Mar 5 03:07:02] NOTICE[19999] chan_sip.c: Registration from '<sip:1114 at 192.168.5.252:5060>' failed for '192.168.5.253' - No matching peer found
[Mar 5 03:07:03] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:07:18] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:07:21] WARNING[19978] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 5 03:07:32] WARNING[19978] chan_dahdi.c: REL on channel (CIC 29) without owner!
Some more information in asterisk logs
[Mar 4 19:12:39] WARNING[3298] chan_dahdi.c: MTP2 link down (SLC 0)
[Mar 4 19:12:41] VERBOSE[3298] chan_dahdi.c: MTP2 link up (SLC 0)
[Mar 4 19:12:42] WARNING[3298] chan_dahdi.c: MTP2 link down (SLC 0)
Here is the output of Asterisk when SS7 is up
Verbosity is at least 3
MTP2 link up (SLC 0)
Received out of sequence MSU w/ fsn of 1, lastfsnacked = 127, requesting retransmission
MTP2 link up (SLC 0)
Received out of sequence MSU w/ fsn of 1, lastfsnacked = 127, requesting retransmission
Received out of sequence MSU w/ fsn of 1, lastfsnacked = 127, requesting retransmission
MTP2 link up (SLC 0)
Asterisk Output
-- Reconfigured channel 1, SS7 signalling
-- Reconfigured channel 2, SS7 signalling
-- Reconfigured channel 3, SS7 signalling
-- Reconfigured channel 4, SS7 signalling
-- Reconfigured channel 5, SS7 signalling
-- Reconfigured channel 6, SS7 signalling
-- Reconfigured channel 7, SS7 signalling
-- Reconfigured channel 8, SS7 signalling
-- Reconfigured channel 9, SS7 signalling
-- Reconfigured channel 10, SS7 signalling
-- Reconfigured channel 11, SS7 signalling
-- Reconfigured channel 12, SS7 signalling
-- Reconfigured channel 13, SS7 signalling
-- Reconfigured channel 14, SS7 signalling
-- Reconfigured channel 15, SS7 signalling
-- Reconfigured channel 17, SS7 signalling
-- Reconfigured channel 18, SS7 signalling
-- Reconfigured channel 19, SS7 signalling
-- Reconfigured channel 20, SS7 signalling
-- Reconfigured channel 21, SS7 signalling
-- Reconfigured channel 22, SS7 signalling
-- Reconfigured channel 23, SS7 signalling
-- Reconfigured channel 24, SS7 signalling
-- Reconfigured channel 25, SS7 signalling
-- Reconfigured channel 26, SS7 signalling
-- Reconfigured channel 27, SS7 signalling
-- Reconfigured channel 28, SS7 signalling
-- Reconfigured channel 29, SS7 signalling
-- Reconfigured channel 30, SS7 signalling
-- Reconfigured channel 31, SS7 signalling
-- Automatically generated pseudo channel
== Starting SS7 linkset on span 1
--- SS7 Down ---
asterisk*CLI>
asterisk*CLI>
asterisk*CLI>
MTP2 link up (SLC 0)
--- SS7 Up ---
Resetting CICs 1 to 30
Received out of sequence MSU w/ fsn of 5, lastfsnacked = 2, requesting retransmission
Got reset acknowledgement from CIC 1 to 30.
MTP2 link up (SLC 0)
MTP2 link up (SLC 0)
Configuration File /etc/asterisk/chan_dahdi.conf
[channels]
language=en
context=from-internal
switchtype=euroisdn
signalling=ss7
toneduration=100
usecallerid=yes
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=no
echocancelwhenbridged=yes
rxgain=1.0
txgain=1.0
group=1
callgroup=1
ss7type = itu
ss7_called_nai=dynamic
ss7_calling_nai=dynamic
linkset = 1
pointcode = 5607
adjpointcode = 5366
defaultdpc = 5366
networkindicator=national
mtp2=1
sigchan = 16
cicbeginswith = 1
channel = 1-15,17-31
;cicbeginswith = 32
;channel =32-62
;cicbeginswith = 63
;channel =63-93
jitterbuffers=4
jbenable = yes
jbmaxsize = 400
jbresyncthreshold = 1000
jbimpl = fixed
jblog = no
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