Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!ucbvax!PHYSICS.UCLA.EDU!mmccarrick
From: mmccarrick@PHYSICS.UCLA.EDU ("MCCARRICK, MIKE")
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: bridge vs. router
Message-ID: <9002021859.aa14084@louie.udel.edu>
Date: 2 Feb 90 22:41:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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I am connecting a small number of PC's to the department-wide
ethernet cable.  There are no more addresses left in the 
class-c subnet assigned to that cable (128.97.64.nnn)
so we have gotten a second class-c subnet (128.97.20.nnn).  The
question is: Must I join the new PC subnet to the department
ethernet using a router or can I just use a bridge?  Will outside
internet routers get confused if there are two subnets on the
same ethernet cable?  Another twist is that we will actually be
sharing the new address space with a group on a different floor.
Both groups have access to the department ethernet cable, but
the connection from one group to the other would require a long
cable parallel to the existing cable.  Thus, if both groups just
bridges off of the main cable, there is no problem.  If, however,
a router is required, it seems as if this address-sharing will
not work unless we link the two groups after the router.

Thanks for any information,
Mike McCarrick
mmccarrick@uclaph.physics.ucla.edu