I think the correct mapping should be:

224.163.163.45 = 01-00-5E-A3-A3-2D

Here is a great URL at 3com by Chuck Semeria and Tom Maufer

http://www.3com.com/nsc/501303.html

I think this will give you a good idea of how to map (not convert) a 32 bit
class D
multicast address to a 48 bit ethernet address.

Hope this helps..dj

""Patrick A. Morin"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> He's talking about multicast IP to multicast MAC translation. Notice the
> MAC address starting with 01
>
> Patrick
>
> > Sisqo wrote:
> > >
> > > Cisco press book (BCMSN) does not really explain well the concept.  I
was
> > > wondering if someone can help me break the barrier.
> > >
> > > Example in the book:
> > >
> > > 224.163.163.45 = 01-00-5E-23-A3-2D
> > >
> > > I thought 163=A3, why is the 2nd octet converted to 23?
> > >
> >
> > There is no corelation between MAC address and IP address,
> > save for the association you make when you assign an IP to
> > an interface.
> >
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