I was working on this solution when I got your email.  I still had the
problem of the interface appearing up even when not connected - the value
for
.iso.org.dod.internet.mgmt.mib-2.interfaces.ifTable.ifEntry.ifAdminStatus
showed up for the ISDN interface.

After thinking about it and poking around in GETIF, I found the following
OID that seems like it will work.  For each route, it has a the ifIndex of
the interface that the packets will go out of to get to that destination.  I
have created a SNMP check for the specific route and set it to alarm when
the interface is set to the BRI interface.

.iso.org.dod.internet.mgmt.mib-2.ip.ipRouteTable.ipRouteEntry.ipRouteIfIndex

> -----Original Message-----
> From: Peter Hoermann [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, December 11, 2002 3:09 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: [SA-list] Checking ISDN backup interface.
> 
> snmp Jack, use getif to get the oid.  You can check the specific bri
> interface
> Peter
> 
> -----Original Message-----
> From: Jack Lyons [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, 11 December 2002 20:58
> To: '[EMAIL PROTECTED]'
> Subject: [SA-list] Checking ISDN backup interface.
> 
> 
> I have Servers Alive monitoring a router on the remote end of a T1.
> I have an ISDN backup to that router, so if the line goes down it is
> picked
> up by the ISDN backup.
> 
> I want servers alive to be able to monitor the ISDN link, but I can't ping
> the ip address of the ISDN link because it will appear up all the time.
> 
> I started working on a batch file that did a tracert and find commands,
> but
> I was wondering if anyone had a smoother solution
> 
> Thanks
> Jack
> 
> 
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