[cisco-voip] ISDN q921 error

[Teodor Georgiev]

do a "show isdn status"

if the layer 1 is up, and layer 2 is down, 75% sure you have not configured 
the master/slave parts on the ISDN link. Check with the other side who is 
supposed to be the "MASTER". 


On Thursday 26 January 2006 17:29, Ruben Montes (EU) wrote:
> Hi,
>
> I've got this error configuring a trunk E1 qsig between Cisco 2821 MGCP and
> MD110 BC9. It seems the router doesn't respond to the sabme packets... ANy
> idea? Maybe a hardware problem?
>
> The controller E1 is up with no alarms and isdn status TEI ASSIGNED.
>
> Regards,
>
>
>
> Ruben
>
>
>
> Jan 26 16:07:25: %CLEAR-5-COUNTERS: Clear counter on all interfaces by
> repsol on vty0 (172.26.70.34)
>
> Jan 26 16:09:50: ISDN Se0/0/0:15 Q921: Net RX <- SABMEp sapi=0 tei=0
>
> Jan 26 16:09:50: ISDN Se0/0/0:15 Q921: S4_SABME: BACKHAULED &
> vsc_wants_L2_up = FALSE
>
> Jan 26 16:09:51: ISDN Se0/0/0:15 Q921: Net RX <- SABMEp sapi=0 tei=0
>
> Jan 26 16:09:51: ISDN Se0/0/0:15 Q921: S4_SABME: BACKHAULED &
> vsc_wants_L2_up = FALSE
>
> Jan 26 16:09:52: ISDN Se0/0/0:15 Q921: Net RX <- SABMEp sapi=0 tei=0
>
> Jan 26 16:09:52: ISDN Se0/0/0:15 Q921: S4_SABME: BACKHAULED &
> vsc_wants_L2_up = FALSE
>
> Jan 26 16:09:53: ISDN Se0/0/0:15 Q921: Net RX <- SABMEp sapi=0 tei=0
>
> Jan 26 16:09:53: ISDN Se0/0/0:15 Q921: S4_SABME: BACKHAULED &
> vsc_wants_L2_up = FALSE