[cisco-nas] RE: [c-nsp] Problem with ISDN backup (stuck CCBs in 12.3(11)T?)

[Mark Johnson]

At 08:51 AM 11/8/2004 -0600, Josh Duffek wrote:

> > Global ISDN Switchtype = basic-net3
> > ISDN BRI0/0 interface
> >         dsl 0, interface ISDN Switchtype = basic-net3
> >     Layer 1 Status:
> >         ACTIVE
> >     Layer 2 Status:
> >         Layer 2 NOT Activated
> >     Layer 3 Status:
> >         0 Active Layer 3 Call(s)
> >         CCB:callid=8097, sapi=0, ces=1, B-chan=1, calltype=DATA,
> > hdlctype=HDLC-TRUNK
> >         CCB:callid=8098, sapi=0, ces=1, B-chan=2, calltype=DATA,
> > hdlctype=HDLC-TRUNK
> >     Active dsl 0 CCBs = 2
> >     The Free Channel Mask:  0x80000000
> >     Total Allocated ISDN CCBs = 2

This is your problem; the question is what's causing it.  As Josh says,
the CCB's are hung (either the initial calls were not cleared correctly,
or they were but we still didn't clean up after ourselves).

VRF Dialer-Watch support was added in 12.3(7)T, but I'm not sure this
new functionality would cause this problem.  It's more likely DW/ISDN
related.

I don't see any bugs that seem relevant.  If possible, I would suggest
you reproduce the problem, doing the following:

debug dialer
debug isdn q931
debug isdn code (hidden)
debug isdn event
sh isdn stat
primary(s) down, dialer up
primary(s) up, dialer down
sh isdn stat
und all

Thanks,

mark