[mrtg] Re: ISDN Interface Monitoring

[Peter P. Benac]

Brad,

    The best way to do this is to block all but interesting traffic on the
ISDN line and make sure that SNMP is not considered interesting traffic.
The problem occurs because your router will bring up the ISDN interface when
it sees traffic going to the IP address on the remote routers IP address on
the ISDN interface.

    Ciscoworks 2000 or Ciscoworks for Windows is not a good choice at any
rate.  It is NOT a fault management system and should not be used as one. 

    If you are looking to receive traps when the ISDN comes up look at
OpenNMS (open source) or if you are looking at a small number of interfaces
What's Up Gold buy Ipswich should do the trick.

Regards,
Pete
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Peter P. Benac, CCNA
Emacolet Networking Services, Inc
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-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch] On
Behalf Of Brad Jones (SC)
Sent: Wednesday, February 09, 2005 14:10
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] ISDN Interface Monitoring


Greeting,
I have recently received a $26,000 USD bill from my ISDN carrier. We employ
128k ISDN circuit at key remote branches to backup a VPN tunnel. As the
result of a router misconfiguration, the ISDN circuit was dialing-up the
head office router every 2 minutes for the last month. Unfortunately,
international toll charges applied.  :(

Does anyone know of a SNMP application that will monitor the ISDN interface
on the remote router and send a notification (pager or email) when that
interface is up?  I've looked at CiscoWorks, but the cost is too much.

Not sure if there is something in MRTG that can accomplish this?

Thanks in advance you your help!

-Brad

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