[asterisk-ss7] No idle circuit found

[Anders Baekgaard]

chan_ss7 behaves correct in this case: a circuit is not released until RLC is 
received from the peer. The CLI command "ss7 show channels" should show all 
CICs as busy. If you get congestion while some CICs are shown as idle, like 
Anton wrote below, that is clearly a bug in chan_ss7. If somebody knows how 
to reproduce that, please let me know.

Best regards
Anders Baekgaard

On Wednesday 21 March 2007 10:05, Domjan Attila wrote:
> 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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