Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!nrl-cmf!cmcl2!phri!roy
From: roy@phri.UUCP (Roy Smith)
Newsgroups: comp.dcom.lans
Subject: ACC ethernet bridge
Message-ID: <3380@phri.UUCP>
Date: 13 Jul 88 00:44:41 GMT
Organization: Public Health Research Institute, NYC, NY
Lines: 23


	After deciding that Ungermann-Bass's prices are out of sight, I've
been looking at an ACC model 4030 ethernet bridge.  It's got some amount of
packet filtering and can run at 56/64kbps (or 112/128kbps with twin serial
lines).  Does anybody have any experience with these?  From the literature
they look to be a nice product and at just under $5k, they're about half the
price of the U/B gear.  Granted, the U/B datalink bridges can run at much
higher speeds (up to T1), but we probably won't have a need for more than
56kbps.

	If I understand things right, the bridge listens on both ethernets
and by looking at the source addresses learns which ethernet addresses are
on which side of the bridge.  If a packet on one net has a destination
address of X and the bridge has already seen a packet on that net with X as
the source address, it doesn't forward the packet to the other net.  You
can also program in some number (60?) of specific addresses to filter out.
I've heard the term "brouter" refering to a hybrid bridge-router.  Is this
kind of filtering bridge what people mean when they say brouter, or is
there yet another kind of beast which gets that name?
-- 
Roy Smith, System Administrator
Public Health Research Institute
{allegra,philabs,cmcl2,rutgers}!phri!roy -or- phri!roy@uunet.uu.net
"The connector is the network"