What a great site! Thanks for the URL.
Priscilla
At 04:29 PM 3/22/01, COULOMBE, TROY wrote:
>http://www.techfest.com/networking/lan/token.htm
>
>HTH,
>
>TroyC
>
>-----Original Message-----
>From: John Neiberger [mailto:[EMAIL PROTECTED]]
>Sent: Thursday, March 22, 2001 3:26 PM
>To: [EMAIL PROTECTED]
>Cc: [EMAIL PROTECTED]
>Subject: Re: Token Ring Routing Control Field
>
>
>True. So what does the third bit (from the left) do? I didn't see any
>mention of the third bit doing anything so I assumed it was zero, hence
>my confusion. If it's not doing anything, why would it be a one
>sometimes and a zero other times?
>
>I've read a token ring FAQ also and still haven't found a mention of
>what that bit is for.
>
>Thanks,
>John
>
> >>> "John Mistichelli" <[EMAIL PROTECTED]> 3/22/01 4:17:59 PM >>>
>
>"A" also starts with 10
>
>8 = 1000
>
>A = 1010
>
>B = 1011
>
>
>
>
> John Neiberger <[EMAIL PROTECTED]> wrote:
>Okay, now I'm confused by something in the Sybex CCIE study guide in
>the
>token ring chapter. It says that if the first two bits of the routing
>control field are 10 the frame is an all-routes explorer. If the first
>two bits are 11 then it's a single-route explorer.
>
>In all of their examples, when they convert the first nibble to hex
>they use A for allroutes explorer and C to indicate single route
>explorer. I understand "C" because 1100 = C, but 1000 = 8, not A.
>What's the deal? Am I losing my mind or is the book wrong? I've
>noticed the book has been wrong in several other places but this is a
>new topic for me.
>
> From what I can tell, a RIF that starts with 8 is an all-routes
>explorer. If it starts with C it is a single-route explorer. If it
>starts with zero it is a nonexplorer frame. Is this correct?
>
>Thanks,
>John
>
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>
>
>John Mistichelli
>CCSI #20000, CCNP, CCDA, MCSE, CNE
>[EMAIL PROTECTED]
>
>
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Priscilla Oppenheimer
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