Newsgroups: comp.dcom.lans
Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!hellgate.utah.edu!cs.utah.edu!haas
From: haas@cs.utah.edu (Walt Haas)
Subject: Re: Do DELNI's cause collisions?
Date: 31 May 90 12:31:48 MDT
Message-ID: <1990May31.123149.2718@hellgate.utah.edu>
Organization: University of Utah CS Dept
References: <145340@felix.UUCP> <2230087@hprnd.HP.COM>

In article <2230087@hprnd.HP.COM> pat@hprnd.HP.COM (Pat Thaler) writes:
>...
>It is correct that heartbeat should not be sent to repeaters. 

Could you clarify this?  Clearly the problem with heartbeat to multiports
is that the heartbeat signal will be repeated inappropriately to N-1 ports.
In the case of a repeater connected directly to a transceiver which generates
SQE, the SQE signal should only appear at the appropriate time as a function
of the packet being forwarded through the repeater.  The DEMPR in fact
requires SQE from its transceiver, otherwise it lights an angry little red
light in complaint.

-- Walt Haas    haas@cs.utah.edu