From: Green, Stephen (Stephen.Green@xxxxxxxxxxxxx)
Date: Mon Oct 02 2000 - 15:34:39 GMT-3
Not sure what the question is here, but
Per CCO
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113t/113t_
3/multisdn.htm
The Multiple ISDN Switch Types feature allows you to configure more than one
ISDN switch type per router. You can apply an ISDN switch type on a per
interface basis, thus extending the existing global isdn switch-type command
to the interface level. This allows Basic Rate Interfaces (BRI) and Primary
Rate Interfaces (PRI) to run simultaneously on platforms that support both
interface types.
I believe 11.3T is the first IOS to allow multiple isdn switch types. The
type specified on the interface takes precedence over the type specified
globally. This would allow you to have two different isdn interfaces
running different switch types. The global would not be relevent unless the
interface did not have a switch-type configured.
I've seen it run on a few routers and not have any issues. Are you seeing
issues or just questioning it's purpose/relevence?
Stephen
-----Original Message-----
From: James Cochrane [mailto:jcochrane@synapse-consulting.com]
Sent: Monday, October 02, 2000 6:20 AM
To: 'ccielab@groupstudy.com'
Subject: RE: ISDN switch type question
I thought that you could only specify one isdn switch-type per router (IOS
11.3). As for IOS 12 I don't know!
>From that I would say that the global takes precedence ... that begs the
question why you can specify a switch type under a single interface, if the
function doesn't work just yet... sounds a bit like the ip address dhcp
command - i.e. it's there but it doesn't work full time.
James.
-----Original Message-----
From: Erick B. [mailto:erickbe@yahoo.com]
Sent: 02 October 2000 07:40
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.
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:25:23 GMT-3