Path: utzoo!attcan!uunet!pyrdc!netsys!ames!amdcad!rpw3
From: rpw3@amdcad.AMD.COM (Rob Warnock)
Newsgroups: comp.dcom.lans
Subject: Re: Any DELNI equivalents?
Message-ID: <23009@amdcad.AMD.COM>
Date: 23 Sep 88 08:53:01 GMT
References: <3340@cs.utexas.edu> <76@billp.pacbell.COM> <902@shark.lamont.Columbia.edu>
Reply-To: rpw3@amdcad.UUCP (Rob Warnock)
Organization: [Consultant] San Mateo, CA
Lines: 28

In article <902@shark.lamont.Columbia.edu> dale@lamont.Columbia.edu
(dale chayes) writes:
+---------------
| In response to the discussion about "DELNI" equivalents:
| We have (at least) four Cabletron MT-800s multi-port transceivers around the 
| lab (and on our ship.) In general, I like them, but I have some reservations.
| LEDS: ...I have grown to distrust the red "CP" led that the manual says is
| collisions. We just don't seem to see them in proportion to the activity of
| this led...
+---------------

The "CP" LED is probably simply reporting activity on the "collision detect"
line of the interface. If you have an 802.3 or Ethernet-2 transceiver on the
coax, the transceiver will briefly pulse "CP" after every transmission (the
so-called "heartbeat"). (EThernet-1 transceivers do not do this.)

Don't worry about it. (...except, all your controllers should probably be
configured for "heartbeat" -- a.k.a. "SQE" -- or they may get confused. I
doubt it is safe to mix 802.3/Ether2 and Ether1 stations on the same multiport.)


Rob Warnock
Systems Architecture Consultant

UUCP:	  {amdcad,fortune,sun}!redwood!rpw3
ATTmail:  !rpw3
DDD:	  (415)572-2607
USPS:	  627 26th Ave, San Mateo, CA  94403