Multicast MAC address' have the second bit odd. That is 01- or 03- to 0f-
The 01-00-5E (I believe) is the multicast address assigned(?) to CGMP/IGMP
-----Original Message-----
From: Jack Williams [mailto:[EMAIL PROTECTED]]
Sent: Friday, February 23, 2001 10:47 AM
To: Williamson, Paul; [EMAIL PROTECTED]
Subject: RE: Here's an easy one
I'm sure the group will tell me if I put my foot in my mouth, but:
Multicast *destination* MAC addresses start with 01-00-5E
------Original Message------
From: "Williamson, Paul" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Sent: February 23, 2001 3:23:34 PM GMT
Subject: Here's an easy one
Ok so we know how to convert a multicast ip into a mac, how about the
reverse.
I got a syslog message that made me curious:-
"invalid traffic from multicast source address 0f:37:59:6f:df:0d"
and i thought well i wonder what ip address that would be but i couldn't
figure out the first octet.
Should all multicast mac addresses start with 01-00-5e ??
Is this mac address invalid ?
Anyone ?
Thanks
-Paul
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