From: Green, Stephen (Stephen.Green@xxxxxxxxxxxxx)
Date: Mon Oct 02 2000 - 15:40:28 GMT-3
Also, if your having problems with isdn, and you change the switch-type to
something other than the telco "claims" is correct, then the telco has
probably mislead you. 90% of the time, they don't know the actualy
switch-type in use. Ask them to look at the work order and tell you
"switch-type" and "protocol-type" 9 times out of 10, they are different.
Switch-type being the physical type of switch... and "protocol-type" being
the actualy software they are running on the switch.
Not sure why changing the global to a "wrong" switchtype would matter. I'd
have to see the debugs on both sides...
debug isdn q931 and debug ppp neg
Stephen
-----Original Message-----
From: Scott Morris [mailto:smorris@mentortech.com]
Sent: Monday, October 02, 2000 12:27 PM
To: 'Erick B.'; ccielab@groupstudy.com
Subject: RE: ISDN switch type question
Sorry about mis-reading... :) (Long night)
It SHOULDN'T affect anything. The global command in 12.0 and later is
assumed to be the default for all interfaces. As the interfaces are brought
up, any switch type on the interface config will be used (overriding the
global). So you're correct in assuming how it should work. I agree with
you that it must be a bug. What specific version/build are you running?
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Erick B.
Sent: Monday, October 02, 2000 2:40 AM
To: Scott Morris; ccielab@groupstudy.com
Subject: RE: ISDN switch type question
Scott,
I know what ISDN is. Please re-read my posting. The
problem I had was the provider was using basic-ni and
the router was configured for basic-ni and when we
placed calls the other side would answer and both
sides would hang up with normal call clearing. The fix
was changing the *global* ISDN switch type to dms100
and we left the interface switch type set to basic-ni.
eg:
isdn switch-type basic-dms100
(was isdn switch-type basic-ni)
interface BRI0
isdn switch-type basic-ni // NOT changed
So, I thought there might be someone on the list able
to answer whether the global or interface switch-type
takes precedence, or if the global switch type
slightly changes the way the IOS handles ISDN stuff
internally.
Probably one of them strange 12.x bugs.
--- Scott Morris <smorris@mentortech.com> wrote:
> ISDN Switch types are DEFINITELY used by IOS. It
> specifies HOW a router
> will talk to an ISDN switch. think of it as a
> dialect within a particular
> language. If you are from the deep south of the US,
> you would have a heck
> of a time speaking to someone from Brooklyn...
> (Just as an example)
>
> ISDN switch types are LOCALLY SIGNIFICANT between
> your CPE device (router)
> and the providers' ISDN switch. It has nothing to
> do with end-to-end
> communication.
>
> Speak with your service provider, and see what type
> their switch is
> expecting to talk to you as. I would suspect that
> if you see the calls
> coming in, and answering then dropping that you're
> looking at a different
> problem other than ISDN switch types.
>
> Scott
>
> -----Original Message-----
> Hello,
>
> I was wondering if anyone knew how IOS really uses
> the
> ISDN switch type specified. I haven't been able to
> find a answer for this yet, other then huh?
>
> I was connecting a remote site w/BRI to a central
> site
> w/PRI. The Central site was connected to ISDN switch
> that used dms100 type and the remote site was
> basic-ni.
> The problem was on the remote site w/BRI and
> globally
> we had isdn-switch type basic-ni and also on the BRI
> interface. ISDN was showing up, spids were good,
> etc.
> We could dial, PRI would get call and we would drop
> right away without getting to PPP. Cause on both
> sides
> was normal clearing. Configs are good - we have
> other
> sites dialing in here just with pretty much same
> config.
>
> After we changed the global ISDN switch type to
> dms100
> and left the BRI interface set to basic-ni it works
> fine. I thought the switch type on the interface
> took precedence or does the global isdn switch type?
> I'm puzzled on this and want to know why.
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