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From: ted@blia.BLI.COM (Ted Marshall)
Newsgroups: comp.dcom.lans
Subject: Re: Do DELNI's cause collisions?
Summary: Quite right
Message-ID: <11737@blia.BLI.COM>
Date: 31 May 90 18:19:38 GMT
Article-I.D.: blia.11737
References: <145340@felix.UUCP> <11702@blia.BLI.COM> <1990May30.181740.14203@agate.berkeley.edu>
Organization: Britton Lee, Los Gatos, CA
Lines: 17

In article <1990May30.181740.14203@agate.berkeley.edu>, cliff@violet.berkeley.edu (Cliff Frost) writes:
- In article <11702@blia.BLI.COM> ted@blia.BLI.COM (Ted Marshall) writes:
- >because the blip comes early within the required 9.6us inter-packet gap,
- >stations waiting to transmit shouldn't be affected either.
-
- But the 9.6us gap is per transmitter.  You've got one station that has just
- sent a packet, and it won't try to send another for 9.6us, but you've got
- 7 (or 15) other stations that don't know anything about the first station's
- transmission and may decide to transmit themselves.  One of them could
- easily see the heartbeat "blip" as a false collision.

Indeed. I hadn't thought that out fully. Sorry about that.

-- 
Ted Marshall          ...!ucbvax!mtxinu!blia!ted  <or>  ted@blia.bli.com
ShareBase Corp., 14600 Winchester Blvd, Los Gatos, Ca 95030     (408)378-7000
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