[CentOS] NMAP - reveal MAC address

>> The main function of a switch is to keep irrelevant packets away from

>> hosts, but packets to unknown (to the switch) hosts get sent 
>> everywhere, just like a Hub would do.
>>
>
>yes - thanks all, it appears its a cross network 'issue'
>
>thanks

If you're trying to get a MAC address across your own switches, you
could try walking the switch's forwarding table (assuming SNMP
availability).  It's a cheesy way but works!

-Chris 

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