Where did you find the errata? Last time I checked ciscopress there was
no errata for that text.
mms> -----Original Message-----
mms> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
Of
mms> Daniel Boutet
mms> Sent: Tuesday, August 29, 2000 9:18 AM
mms> To: [EMAIL PROTECTED]
mms> Subject: Re: Multicast adrressing: ip to Mac
mms>
mms>
mms> I wanted to add that there is also an errata to the figure 8-5
mms> page 294 of
mms> the BCMSN book by Karen Webb
mms> The 48-bit ethernet address should read:
mms>
mms> 0000 0001 0000 0000 0101 1110 0 which converts to
mms> 01:00:5e This leaves
mms> 23 bit that can be matched to the Ip Multicast least-significant
mms> 23 bits.
mms>
mms>
mms> ""Daniel Boutet"" <[EMAIL PROTECTED]> wrote in message
mms> 8ogm9b$bsb$[EMAIL PROTECTED]">news:8ogm9b$bsb$[EMAIL PROTECTED]...
mms> > I am studying for the switching exam and I am converting ip
multicast
mms> > address to ethernet addresses.
mms> > What i don't get is that they state in the Cisco press book
mms> (page 294/295)
mms> > "the least 23 least significant bits of the ip multicast
mms> group are
mms> place
mms> > into the frame..."
mms> > "half of the ethernet block 01:00:5e:00:00:00 to
mms> 01:00:5e:7f:ff:ff
mms> > correspond to ip multicast...."
mms> >
mms> > I really only use twenty when I am converting from binary to hex.
mms> >
mms> > Scenario: 224.138.8.5 (to use their example)
mms> > 1110 0000 1000 1010 0000 1000 0000 0101
mms> > 01:00:5e:0A:08:05
mms> >
mms> > Since the 01:00:5e:0 are always going to be, then I am only
mms> concerned
mms> with
mms> > the least significant 20. Is this right?
mms> >
mms> > I did their exercise on page 319/320 and got 100% (their is
mms> an errata for
mms> > one of the address but it is a decimal to binary error) but I did
not
mms> > use the 01:00:5e:0 as the base but 01:00:5e:
mms> >
mms> > Thanks!
mms> >
mms> >
mms> >
mms> > ___________________________________
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smime.p7s
