Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!ariadne!nicolas
From: nicolas@csi.forth.gr (Nicolas Chrissakis)
Newsgroups: comp.dcom.lans
Subject: Re: FDDI question: bridges, routers, interoperability ...
Keywords: FDDI bridge
Message-ID: <1794@ariadne.csi.forth.GR>
Date: 24 May 91 19:16:05 GMT
References: <1779@ariadne.csi.forth.GR> <1991May23.204305.14614@bronze.ucs.indiana.edu>
Sender: news@csi.forth.GR
Lines: 47

robelr@ucs.indiana.edu (Allen Robel) writes:

>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.

Have you seen this working?

>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.

The router is only a router and maybe in the future a
transilation bridge .

Encapsulation is out of the question seens it is not a standard.

>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.

I want to mix routers with bridges on the FDDI ring.
Not routers with translation bridging capacity.
Will they interoperate? Any sites have done that?

>regards,
Nicolas Chrissakis                  Office: +30 81 229368, 229302,221171,229346
Systems Analyst                     Fax   : +30 81 229343, 229342  
Foundation of Research              Telex : 262389 CCI GR 
and Technology - Hellas             E-mail: nicolas@csi.forth.gr  
Institute of Computer Science               NICOLAS @ ARIADNE 
P.O.Box 1385, Heraklio,                     ariadne!nicolas
Crete Greece 711 10