One method that we've found quite successful is as follows....

Discover the loopback interfaces, ISDN interface and the Serial line
interface.
Unmanage and hide the ISDN interface.

If the serial line goes down -  the ISDN interface is automatically
brought up, this means that the serial line interface is red but
Loopback is still green, ( the ISDN interface colour takes no part in
status propagation) so the router goes yellow......then reverts back to
green when the serial line is brought up.

Neil Whitehead (x22808)
IT Services (Telecoms)
The Royal Bank of Scotland
Tel: 0131-523 2808
e-mail: whitern AT rbos.co DOT uk

> -----Original Message-----
> From: Leslie Clark [SMTP:lclark AT US.IBM DOT COM]
> Sent: Friday, October 30, 1998 3:47 AM
> To:   NV-L AT UCSBVM.ucsb DOT edu
> Subject:      Handling numbered ISDN interfaces
>
>
> *** Warning : this message originates from the Internet ***
>
> I think a lot of people are dealing with this, and I'd like some
> suggestions.
> I understand that you
> don't want to manage the particular dial interfaces, or they will be
> brought up
> unneccessarily. So
> you  unmanage them. How do you avoid re-managing them, such as when
> you
> unmanage/manage
>  the router? Just take care?  ith the backup interface unmanaged, I
> expect that
> the router is green
> under normal circumstances, and red when it is down, and still red
> when the
> backup interface comes
> up.  How do you deal with that from an operational standpoint, looking
> at the
> map?  Do you add
> another object to the node submap and manage its status with the traps
> that
> come in when the
> backup interface comes up ( that would give you yellow, maybe)?  I see
> in the
> interface mib that
> some of these things have an Admin status of Up and an Oper status of
> Dormant.
> Is anyone doing
> anything fun with that?  Any satisfactory scenarios out there?
>
> Cordially,
>
> Leslie A. Clark
> IBM Global Services - Systems Mgmt & Networking


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