[asterisk-users] MDL-ERROR

[Mitul Limbani]

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<javascript:_e({}, 'cvml', '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/
http://www.entvoice.com/
email: mitul at enterux.in
DID: +91-22-71967196
Cell: +91-9820332422
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