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MCAST MAC addresses ??

Can anyone point me to a reference on what these MAC addresses might be?

03:00:00:00:00:01

01:40:96:ff:ff:ff

01:40:96:00:00:00

01:00:0c:00:00:00

We had thought they might be multicast but have not yet found any info to back that up.

We are seeing these mixed in with our Wireless traffic

2 REPLIES
New Member

Re: MCAST MAC addresses ??

I don't think these are multicast mac addresses these are the defined mc addresses for multicast 0100.5e00.0000 through 0100.5e7f.ffff. and the address 03:00:00:00:00:01 does not fall in this range. Also there's no 5e in the second octet. for more details check this URL

http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ipmulti.htm#xtocid10

New Member

Re: MCAST MAC addresses ??

Thanks for the link. I hadn't found that one before.

We are still seeing these addresses when sniffing our Wireless segments. So I am still trying to track them down if anyone has any other input.

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