----- Original Message -----
From: "ToddAndMargo" <[email protected]>
To: "Scientific Linux Users" <[email protected]>
Sent: Sunday, July 27, 2014 2:36:26 AM
Subject: How do I discover all the MAC address on my Ethernet?
Hi All,
I have been Duck Duck Go'ing looking for how to discover
all the mac addresses on my Ethernet.
http://www.linuxinternetworks.com/how-to-find-out-all-mac-address-on-network/
Says to do: nmap -sP 192.168.1.0-255
Done that before and it does give you all the mac addresses
on 192.168.1.0/24, but it does not give you mac addresses
for those devices with different network configuration
on your Ethernet. (Like a stray access point on
192.168.88.0/24 on your Ethernet.)
I have tried these guys' java script:
http://www.ubnt.com/downloads/discovery/ubnt-discovery-v2.3.zip
It runs but doesn't find anything. Ran it in an XP VM too
and it struck out there either.
Does anyone know how to get all the mac addresses on your
Ethernet, even the ones configured on another network?
Many thanks,
-T
On 07/27/2014 08:44 AM, John Lauro wrote:> If you want to get the mac
addresses configured as different networks or subnetworks, but on the
same phyiscal network the best way would be to query the switches on the
network.
>
> A couple of common commands for managed Cisco-like switches is
> show mac address-table
> or
> show bridge address-table
>
> but it depends on your switch, and I am sure other switches use other
commands...
>
> Best if you run on all switches, as if two devices talk a lot to each
other but nothing else, then only the switches those packets go through
will likely show the address being used.
>
> Another option if you can't query all the switches, would be to run
> tcpdump -en -i eth0 -- broadcast
>
> and wait awhile and parse all the results... should probably run for
at least 30 minutes, but possibly longer if default arp expiration is
larger or are automatically renewed on traffic...
>
>
>
Hi John,
Thank you!
No switches to log into. Just cheezy routers. I am usually
trying to locate a printer or an access point.
-T
