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Date:      Fri, 26 Sep 1997 23:10:25 -0700 (PDT)
From:      "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com>
To:        dg@root.com
Cc:        tlambert@primenet.com, tarkhil@mgt.msk.ru, hackers@FreeBSD.ORG, stable@FreeBSD.ORG
Subject:   Re: 'fxp' driver/hardware lossage (was Re: Alexander B. Povol's mail)
Message-ID:  <199709270610.XAA19592@GndRsh.aac.dev.com>
In-Reply-To: <199709270110.SAA01062@implode.root.com> from David Greenman at "Sep 26, 97 06:10:48 pm"

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>    You can't send a packet to yourself under normal circumstances (ethernet
> is a simplex device).

Only broken NIC chips are simplex, even the 82586 is actually capable
of hering itself talk on the wire, though most drives do not set
the chip into this mode.  Either way ``ethernet is _not_ a simplex
device''.

Infact the 82586 has the ability to due cource grain TDR (Time Domain
Reflectonmetry) for finding bad coax (thick or thin).

-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation, Inc.                   Reliable computers for FreeBSD



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