[asterisk-users] kernel: dahdi: Master changed to TE2/0/2 --- Is a normal message

[Shaun Ruffell]

On Wed, Sep 12, 2012 at 12:19:41PM -0300, equis software wrote:
> I have a server with an asterisk ss7 link connected to a Siemens
> working well for over a year.
>
> A few days ago I started having problems with signaling.  I found
> the following logs in / var / log / messages
> 
> [1018427.030959] dahdi: Master changed to TE2/0/2
> [1018427.120740] dahdi: Master changed to TE2/0/1
> [1018427.789173] dahdi: Master changed to TE2/0/2
> [1018427.884828] dahdi: Master changed to TE2/0/1
> [1018431.209621] dahdi: Master changed to TE2/0/2
> [1018431.300289] dahdi: Master changed to TE2/0/1
> [1018434.763742] dahdi: Master changed to TE2/0/2
> 
> If I stop the asterisk and dahdi driver just let the messages
> continue to appear.
> 
> Any ideas??

My guess is you have a cabling problem and that span TE2/0/1 is
going into and out of alarm.

Each time it goes into alarm the core of DAHDI will look for a new
span to use as a timing source for asterisk. If TE2/0/1 is the
"preferred" timing source, when it comes out of alarm, DAHDI will
switch the timing back to it.

-- 
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org