Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!hp-col!hpctdlb!chw
From: chw@hpctdlb.HP.COM (Charlie Whiteside)
Newsgroups: comp.dcom.lans
Subject: Re: More questions regarding the LAN
Message-ID: <31710003@hpctdlb.HP.COM>
Date: 26 Feb 91 16:08:03 GMT
References: <2334@enuxha.eas.asu.edu>
Organization: Hewlett-Packard CTD, Colo. Spgs.
Lines: 20


 These are very interesting discussions! I don't understand something
here though:


>     This is where I must differ on the use of the AR and FCI
>     bits fairly strongly....they are part of the fundamental
>     ring mechanisms for finding Active Monitors, noting whether
>     or not the destination is present and has or has not
>     "copied" a xmitted frame.  Without these two bits you would
>     have needed an Ack sequence at the MAC layer....overhead
>     these two avoid.

I thought the FCI (I'm assuming this means the Frame Copy bits in
the Frame Status Byte) had nothing to do with the Active Monitory
present. Isn't the AC (Access Control xxxTMxxx) byte the one which
sets the Monitor bit to alert of two active monitors?


Charlie