[mrtg] Re: Help on MRTG polling using MAC address

[Arminder Singh]

Dear Rich,

Thanks a lot for such a wonderful suggestion. What I have is that all
servers are on same subnet and connected to using managed switches. What I
will will do is that I will try this thing out and lets hope that it would
work (well...it should).

Regards

Arminder Singh

----- Original Message -----
From: "Rich Adamson" <radamson at routers.com>
To: <mrtg at list.ee.ethz.ch>
Cc: "Arminder Singh" <m-list at pugmarks.com>
Sent: Wednesday, August 21, 2002 7:49 PM
Subject: [mrtg] Re: Help on MRTG polling using MAC address


>
> Arminder,
>
> Mrtg uses snmp (a layer-3 protocol), which requires a layer-3 IP address
to
> function. One way to fake the IP address of each remote device is to set
> up permanent ARP table entries in the mrtg machine. This approach assumes
> there are no routers with proxy arp between the mrtg machine and the boxes
> that you'd like to poll.
>
> If the mrtg machine is a Windows box, then:
>   arp -s 192.168.155.1   00-aa-00-62-c6-09  .... Adds a static entry.
>
> If the mrtg machine is a Unix box, then "man arp" for the proper syntax
> as it varies slightly from one OS to another.
>
> The above approach creates a permanent arp table entry in the mrtg box,
and
> mrtg would be configured to poll the 192.168.155.1 address (using the
above
> example). Whatever the actual IP address is of the remote box then becomes
> irrelevant.
>
> If there is a router between the mrtg box and the remote device, one would
> need to create permanent arp table entries in each router as well.
>
> Rich
>
> ------------------------
> > Now, the problem I'm facing is that I need to setup MRTG wherein I need
to poll using MAC
> addresses instead of IP address.
> >
> > I am having lots of Linux & Windows servers. I couldn't poll using eth0
cause then I would
> need to run MRTG there on each server. The problem is that IP addresses
needs to be changed and
> keep on shifting to other server. So whenever such change occur, I need to
change the MRTG
> configuration. Also I can't poll on switch because sometimes
re-structuring needs to be done.
> >
> > Now since we don't change NICs, they are the only static things which
don't change. If anybody
> of you could guide me to any patch/hack available for MRTG which could
help me solve my problem,
> that would be highly appreciative.
> >
>
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