Re: Switches and Multicast doubt

Indeed, good clarification
------Original Message------
From: Marko Milivojevic
To: Joe Astorino
Cc: CCIE KID
Cc: Cisco certification
Subject: Re: Switches and Multicast doubt
Sent: Sep 28, 2011 12:35 PM

On Wed, Sep 28, 2011 at 08:47, Joe Astorino <joeastorino1982_at_gmail.com> wrote:
>
> Additionally, Multicast at an L2 Ethernet level is defined by the range
> 01:00:5e:00:00:00 - 01:00:5e:7f:ff:ff. IANA owns the 24-bit OUI 01:00:5e.
> The 25th MSB is always 0, and that leaves 23 bits for actual multicasting

This is true only for IP multicast. For example, CDP is also
multicast, but not IP multicast. As an example, CDP frames are sent to
01:00:0c:cc:cc:cc. These are not IP multicasts, but are multicast
frames.

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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Sent from my Verizon Wireless BlackBerry
Regards,
Joe Astorino
CCIE #24347
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