Thanks, I hope that this is the definitive answer because I have been seeing
a great deal of sloppiness surrounding this point on "practice tests."
----- Original Message -----
From: "Ahmed Aden" <[EMAIL PROTECTED]>
To: "perryb" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, February 14, 2001 1:02 PM
Subject: Re: RIF "length" Field Question
>
>
> I'll try to answer your question, someone please correct me if I missed
> something or said something wrong.
>
>
>
> to answer your question, he is
> not taking into account the last bridge number which is 0. When he says 2
> brides, he means 2 real bridges, and an assumed 3rd bridge to complete
> the last 4 bits of the last ring/bridge pair.
>
>
> On Wed, 14 Feb 2001, perryb wrote:
>
> > Hello all,
> >
> > I'm a little confused over "length" bits in the RIF. The Token Ring
White
> > Paper (Lou Rossi), states that "bits 12 through 8 describe the total
length
> > represented in bytes." It goes on to say that a value of "a" indicates
> > there are 3 bridges, an "8" indicates there are 2 bridges, and a "6"
> > indicates there is one (1) bridge.
> >
> > My question is this: Does the above parameters take int0 account the
very
> > last bridge i.e., since all RIFs end in a bridge of "0," is this last
bridge
> > (0) included in the count of the length bits?
> >
> > Example:
> >
> > Packet type = specific route
> > Direction ---->
> > Frame size = 512
> >
> > Host1--ring--bridge--ring--bridge--ring--Host2
> >
> > Would this be a "0830.xxxx.xxxx.xxx0" or a "0A30.xxxx.xxxx.xxx0"
> >
> > The reason that I ask, is because on several CCIE practice test, as well
as
> > the actual written exam, the answers do not seem to regard this fine
point.
> >
> > thanks
> >
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>
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