[mrtg] Re: IP address of device on a switch?

[Daniel J McDonald]

> Also, if your switch supports the mibs in the ipNetToMediaTable
> (1.3.6.1.2.1.4.22) you should be able to find out not only
> the MAC but the
> IP address of the MACs and the ports they are on.  It's a
> pretty cool table
> supported by many routers and maybe your switch will populate it too.

It is highly unlikely that you will gain useful information from
ipNetToMediaTable on a switch.  This table is only populated when the
management engine needs to communicate - such as answering an SNMP request,
or a manager telnetting in to fix something.  It's best if you can correlate
the ipNetToMediaTable from a router with the mac address tables on the
switch.



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