[asterisk-users] MDL-ERROR

[Mikhail Lischuk]

Mitul Limbani писал 05.09.2013 21:43: 

> Something very
similar happened on our boxes and we did nothing special apart from
changing DAHDI and Asterisk versions to higher stable (2.6.1 n 1.8.14
respectively) and it went off. 
> 
> Don't really know exactly why it
happens, it would be worthwhile to investigate if you see it again on
CLI or logs. 
> 
> Mitul 
> 
> On Friday, September 6, 2013, Richard
Mudgett wrote:
> 
>> On Thu, Sep 5, 2013 at 1:02 PM, jg
<webaccounts at jgoettgens.de> wrote:
>> 
>>> I have 2 ISDN BRI boxes, each
with 4 spans, where the first one is configured as CPE, the second one
as NET(so I don't need real lines for developing and testing).
>>> 
>>>
Once in a while I do see the following libpri error messages
simultaneously on both boxes:
>>> 
>>> PRI Span: 1 TEI=0 MDL-ERROR (A):
Got supervisory frame with F=1 in state 7(Multi-frame established)
>>>
PRI Span: 2 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> PRI Span: 2 TEI=0 MDL-ERROR (A): Got
supervisory frame with F=1 in state 7(Multi-frame established)
>>> PRI
Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> PRI Span: 2 TEI=0 MDL-ERROR (A): Got
supervisory frame with F=1 in state 7(Multi-frame established)
>>> PRI
Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> PRI Span: 2 TEI=0 MDL-ERROR (A): Got
supervisory frame with F=1 in state 7(Multi-frame established)
>>> PRI
Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> PRI Span: 4 TEI=0 MDL-ERROR (A): Got
supervisory frame with F=1 in state 7(Multi-frame established)
>>> PRI
Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> PRI Span: 4 TEI=0 MDL-ERROR (A): Got
supervisory frame with F=1 in state 7(Multi-frame established)
>>> PRI
Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state
7(Multi-frame established)
>>> ...
>>> PRI Span: 4 TEI=0 MDL-ERROR (A):
Got supervisory frame with F=1 in state 7(Multi-frame established)
>>>

>>> It does not seem to be a severe error, because everything seems to
work. I have not yet figured out how to produce these error messages
reliably. They seem to appear after booting both machines before any
calls have been made.
>>> 
>>> Does anybody know what to do with these
messages?
>> 
>> Q.921 just says to log the condition and carry on as if
it did not happen. It does not say what to do
>> about it. The condition
is likely to happen when the Q.921 peers are out of sync with each
other. When
>> you reboot your machines, they will be out of sync with
each other for awhile. I cannot think of a
>> particular sequence of
events off-hand where it would happen though.
>> 
>> Richard
> 
> -- 
>

> Regards,
> Mitul Limbani,
> Chief Architech & Founder,
> Enterux
Solutions Pvt. Ltd.
> 110 Reena Complex, Opp. Nathani Steel, 
>
Vidyavihar (W), Mumbai - 400 086. India
> http://www.enterux.com/ [4]
>
http://www.entvoice.com/ [5]
> email: mitul at enterux.in
> DID:
+91-22-71967196
> Cell: +91-9820332422
> 
> --
>
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-- 
With
Best Regards
Mikhail Lischuk

+380681244933

+380504182274




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