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From: robelr@ucs.indiana.edu (Allen Robel)
Newsgroups: comp.dcom.lans
Subject: Re: FDDI question: bridges, routers, interoperability ...
Keywords: FDDI bridge
Message-ID: <1991May23.204305.14614@bronze.ucs.indiana.edu>
Date: 23 May 91 20:43:05 GMT
References: <1779@ariadne.csi.forth.GR>
Sender: news@bronze.ucs.indiana.edu (USENET News System)
Organization: Indiana University
Lines: 31

In article <1779@ariadne.csi.forth.GR> nicolas@csi.forth.gr (Nicolas  
Chrissakis) writes:

> I have a host A connected to an ethernet segment. The ethernet segment is
> connected on an FDDI bridge and the bridge on an FDDI ring. I have a
> host B connected to an ethernet segment. The ethernet segment is connected
> on a FDDI ethernet router and the router on the ring.
> 
> My question is: Will A talk to B?
> 
> The bridge will be Dec compatible translation bridge.

If you are only concerned with protocols that a particular
router routes, then there shouldn't be any problems if the
bridge in front of A is indeed a *translation* bridge.
If the router is a bridge/router however, and the 
bridge part is an encapsulation bridge, then host B's
protocols that the router must *bridge* will be 
unintelligible to the translation bridge and it will
not forward them to host A.

In general, you can't mix encapsulation and translation
bridges on an FDDI and you can't mix different vendor's
encapsulation bridges and expect them to interoperate.

regards,

Allen Robel                         robelr@mythos.ucs.indiana.edu 
University Computing Services       ROBELR@IUJADE.BITNET 
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