> MAC address cloning can cause issues also if we are not careful.
A duplicated MAC address in a network is as bad (or *WORSE*) that a
duplicated IP address.
Once the MAC address is resolved via an ARP 'who has" request, and the
IP/MAC has been entered in the ARP table, ail communication is predicated on
knowing the MAC address.
I can track a duplicated IP address, I don't know if it is possible to track
a duplicated MAC.
Brrrrrrrrr...
ET
Ed Knapp writes:
> The first unknown ( .3 ) looks like a Canon device. Printer?
> .8 is a Vizio device. TV?
> .104 is a device from a company called Silex. Could be any number of devices. They seem to make a wide range of interesting products.
> http://www.silexamerica.com
>
> I just used a MAC address search tool online.
> The first one that came up for me was http://www.coffer.com .
> The first part of a Mac hardware address is the manufacturer. The remainder is a unique serial number/identifier. The two together (are supposed) make a globally unique hardware address to prevent any possible addressing conflicts.
>
> Some, er, less conscientious manufacturers aren't diligent about ensuring truly unique mac addresses. It is easier and cheaper to make half a million exact copies than the added cost and complexity of incrementing the MAC address.
> MAC address cloning can cause issues also if we are not careful.
>
> Hopefully that will help a bit in tracking what has connected to your network.
> Let us know here on the list if you have any other questions or if we can elaborate.
>
> Have a great night!
>
> Ed K.
> Plug lurker
>
>> On Jul 6, 2014, at 11:33 PM, joe@actionline.com wrote:
>>
>> How can I identify the unknown devices (????? below)
>> on my local network?
>>
>> Source IP: Devices: Mac addr:
>> 192.168.0.1 Motorola 00:24:37:85:73:f0 REPLACED
>> 192.168.0.2 X5003191 2c:44:fd:67:34:ab Ethernet 3
>> 192.168.0.3 Unknown ?? 88:87:17:c0:a4:45 ?????
>> 192.168.0.4 Galaxy phn 0c-71-5d-29-dc-ff
>> 192.168.0.5 Tivo 84600 00:11:d9:55:72:ca
>> 192.168.0.6 Xoom tab 98-4b-4a-c0-6f-3a
>> 192.168.0.7 Chromecast d0:e7:82:c4:5c:ac
>> 192.168.0.8 ?????????? 00:19:9d:56:50:2e ?????
>> 192.168.0.9 Nexus7 tab ac:22:0b:44:da:95
>> 192.168.0.10 HP laptop e0:06:e6:a2:93:a5
>> 192.168.0.91 Lenovo 70:71:bc:3e:00:ed
>> 192.168.0.64 T43 laptop 00:12:f0:34:5c:33
>> 192.168.0.104 BRW008092CAC78E - 00:80:92:ca:c7:8e ?????
>>
>>
>>
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