[asterisk-ss7] No idle circuit found

Wed Mar 21 02:05:19 MST 2007

Hi,
easy to reproduduce the problem:

I started 2 asterisk on the same box, in the box is a TE405

asterisk -cvvvp
asterisk -cvvvp -C /etc/asterisk2/asterisk.conf

connect 1-2 and 3-4 ports crosslink E1 cables

I make a call to box1 (SIP), chain the call between 2 asterisks
(dialplan) using all ss7 circuits, end terminate an apllication ag.
Milliwatt.

exten => _66XX,1,NoOp
exten => _66XX,2,Dial(SS7/test/$[${EXTEN} + 1])

exten => 6630,1,NoOP(${EXTEN})
exten => 6630,2,Milliwatt()

Its works fine, everything is ok.
Now stop the box2 with CTRL-C, start again.
box1 hangup all the channels, ss7 linestat indicate all the channels are
idle, but I cant use all the circuits:

[Mar 21 10:02:26] NOTICE[14057]: l4isup.c:2469 process_iam: IAM
(cic=29): ANI=57 DNI=6622 RNI= redirect=no/0 complete=1.
    -- Executing [6622 at from-ss7:1] NoOp("SS7/test/29", "") in new stack
    -- Executing [6622 at from-ss7:2] Dial("SS7/test/29", "SS7/test/6623")
in new stack
    -- SS7 request (SS7/test/6623) format = 0x8.
    -- SS7 channel SS7/test/6623 allocated successfully.
    -- Called test/6623
[Mar 21 10:02:26] NOTICE[14057]: l4isup.c:2469 process_iam: IAM
(cic=33): ANI=57 DNI=6623 RNI= redirect=no/0 complete=1.
    -- Executing [6623 at from-ss7:1] NoOp("SS7/test/33", "") in new stack
    -- Executing [6623 at from-ss7:2] Dial("SS7/test/33", "SS7/test/6624")
in new stack
    -- SS7 request (SS7/test/6624) format = 0x8.
    -- SS7 channel SS7/test/6624 allocated successfully.
    -- Called test/6624
[Mar 21 10:02:26] NOTICE[14057]: l4isup.c:2469 process_iam: IAM
(cic=35): ANI=57 DNI=6624 RNI= redirect=no/0 complete=1.
    -- Executing [6624 at from-ss7:1] NoOp("SS7/test/35", "") in new stack
    -- Executing [6624 at from-ss7:2] Dial("SS7/test/35", "SS7/test/6625")
in new stack
    -- SS7 request (SS7/test/6625) format = 0x8.
[Mar 21 10:02:26] WARNING[15213]: l4isup.c:391 cic_hunt_even_mru: No
idle circuit found.
[Mar 21 10:02:26] WARNING[15213]: l4isup.c:656 ss7_requester: SS7
requester: No idle circuit available.
[Mar 21 10:02:26] WARNING[15213]: app_dial.c:1090 dial_exec_full: Unable
to create channel of type 'SS7' (cause 34 - Circuit/channel congestion)

chan_ss7 is writing this notice:
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=61.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=59.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=47.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=45.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=57.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=55.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=46.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=62.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=60.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=54.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=52.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=50.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=48.
[Mar 21 10:00:31] NOTICE[14057]: l4isup.c:768 t1_timeout: T1 timeout
(waiting for RLC) CIC=58.

On Sat, 2007-03-17 at 10:01 +0500, Anton wrote:
> 0.8.4 has the same problem.
> 
> On 8 March 2007 15:27, Anton wrote:
> > Just looked through the mailing list - Nico
> > asterisk at nicox.org reported that a while ago -
> > Confirming - I met the same situation - chan_ss7 or
> > asterisk (atleast up to 1.2.12.1) have the channel
> > allocation problem. Later asterisk versions does not work
> > with chan_ss7 for me.
> >
> > On 8 March 2007 15:19, Anton wrote:
> > > Does anyone experiencing a situation, when loaded
> > > chan_ss7 0.9 after a while of operation (for me 2 days)
> > > - stopped accepting calls - while having all of the
> > > channels free - I'm getting congesion - "no idle
> > > circuit found"  - asterisk reload cures the situation.
> > > _______________________________________________
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