1) For each byte: abcdefgh
2) Stick an axis right down the middle: abcd efgh (essentially separating
the byte into two nibbles)
3) Spin the byte around the axis: hgfe dcba
4) Do this for each byte in the octet separately. The order of the bytes
doesn't change: 1.2.3.4 -> 1.2.3.4
So, your example:
0000 0000. 0000 1100.0110 0101.0100 0011.0010 0001 (which has five bytes,
for some reason, so I'll ignore the last one)
would translate into:
0000 0000. 0011 0000. 1010 0110. 1100 0010
That's about it - I think. If I'm wrong, someone please let me know - I've
just started studying for the CCIE written, and this is all from memory of
Rossi's paper (about a week ago :-).
BJ
----- Original Message -----
From: Michael Snyder
Newsgroups: groupstudy.cisco
To: [EMAIL PROTECTED]
Sent: Saturday, March 03, 2001 1:45 PM
Subject: Ethernet MAC <--> Token Ring MAC
What is the bit by bit method of going from a Ethernet Mac address to a
Tokenring Mac address?
I've read the paper's, I still can't do it, and I've been doing HEX for
years.
For example
00.00.0c.65.43.21 Ethernet MAC would be?
0000 0000. 0000 1100.0110 0101.0100 0011.0010 0001
Next step is?
a) reverse complete bit sequence? 1000 0100.1100 0010.1010 0110. 0011 0000.
0000.0000
b) reverse sequence in groups of four? 0001 0010.0011 0100.0101 0110.1100
0000 0000
c) Transpose bits in groups of four, per byte? a.b ->b.a (seen this one a
lot in programing)
help?
""perryb"" <[EMAIL PROTECTED]> wrote in message
007901c0a011$52ec4d00$1e00a8c0@GOLDIE1">news:007901c0a011$52ec4d00$1e00a8c0@GOLDIE1...
> Hi all,
>
> I'm goinf to diverge from the star/bus issue in Mr. Rossi's paper, and
> direct everyones attention to what I believe could be a mistake (clerical
> error) in the paper on the DLSW piece.
>
> Directly underneath Mr. Rossi's very first DLSW diagram, you see the RIF
> values for "Router_A," and "Router_B." Isn't the RIF show for "Router_B"
> just a tad bit inverted and incorrect ? Shouldn't it read
"0630.00a1.0230"
> instead? The reason that I say this is because I had a "not so different"
> question on a recent exam. On this exam there were no "none of the above"
> responses and only two possible valid RIFs. The only plausable response
was
> in the order that I describe above.
>
>
> Forgive me if this has already been pointed out before.
> ----- Original Message -----
> From: <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, February 26, 2001 6:45 AM
> Subject: RE: Lou Rossi's Token Ring paper
>
>
> > I agree with Nigel. It should be a physical star and a logical ring.
> >
> > Cletus Ugwu
> >
> > -----Original Message-----
> > From: Nigel van Tura [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, February 26, 2001 7:29 AM
> > To: Bradley J. Wilson; [EMAIL PROTECTED]
> > Subject: RE: Lou Rossi's Token Ring paper
> >
> >
> > But Bradley
> >
> > If we connect all to the MAU as a central hub then it becomes a physical
> > star and a logical ring inside the MAU.
> >
> > Or what ?
> > Nigel van Tura
> >
> > -----Original Message-----
> > From: Bradley J. Wilson [mailto:[EMAIL PROTECTED]]
> > Sent: 24 February 2001 01:50
> > To: cisco
> > Subject: Lou Rossi's Token Ring paper
> >
> >
> > I'm sitting here reading Lou Rossi's Token Ring paper, and right off the
> bat
> > I have a question:
> >
> > He says that token ring is "a physical ring and a logical bus" - but
isn't
> > this backward? Isn't it a physical bus and a logical ring? We're not
> > physically connecting stations together in a ring - they're all plugged
> into
> > a MAU and the "ring" is a logical entity inside the MAU, isn't it?
> >
> > Thanks in advance,
> >
> > BJ
> >
> >
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
> _________________________________
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
_________________________________
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
