[mrtg] Auto-Discovering IPs of Switch Ports

Petr Lázňovský lazna at volny.cz
Tue Oct 20 19:32:09 CEST 2009

I expect we are talking about L2 switch. The L2 switch working only with MAC address.


> Well my thinking was: the switch obviously knows what host is plugged into
> which port, the question is then: is this info exposed via SNMP?  If so then
> MRTG should be able to extract it.

> 2009/10/20 Petr Lázňovský <lazna at volny.cz>

>> AFAIK no. What mrtg only does is read the number of bytes which goes
>>  through specified port by time period (switch itself count data, mrtg only
>> read the sum) and put the numbers into graphs.

>> You or network admin should know, where is device witch specific IP and to
>> which port of switch is connected.

>> L.

>> > So my question is, can MRTG auto-discover the IP of the connected devices
>> on
>> > the switches ports?

>> > thanks

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