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From: pat@hprnd.HP.COM (Pat Thaler)
Newsgroups: comp.dcom.lans
Subject: Re: Do DELNI's cause collisions?
Message-ID: <2230087@hprnd.HP.COM>
Date: 30 May 90 16:19:58 GMT
References: <145340@felix.UUCP>
Organization: HP Roseville Networks Division
Lines: 14

> 
>  (Comment that repeaters and bridges are not suppose to be connected
>   to MAUs which generate heartbeat.)

There seems to be a common misconception that bridges should not be
connected to MAUs with heartbeat.  This is not correct.  From the point
of view of the MAU, the bridge is the same as a DTE.  It uses the same
media access control method as any other DTE (station, node, or other
term of your choice) on the network and has the same need for heartbeat.
("same need" = many DTEs will operate while connected to MAUs which
do not produce heartbeat since Ethernet Rev 1 did not have heartbeat.)
It is correct that heartbeat should not be sent to repeaters. 

Pat Thaler