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dual-segments; gateway

daemon@ATHENA.MIT.EDU (Joselito J Chua)
Sun Jul 14 11:27:36 1996

From: Joselito J Chua <jjchua@cs.monash.edu.au>
To: linux-net@vger.rutgers.edu
Date: 	Sun, 14 Jul 1996 13:29:22 +1000 (EST)


(1) This is a request for feedbacks/opinions/suggestions
    on the dual-segment set-up illustrated in the 
    diagram below.

(2) My objective is to localise traffic on each
    of the departmental segments of the LAN.

(3) There are three departments (D1..D3), each with its
    own server (S1..S3).  The PC's are connected in a 
    coax bus.  
    
(4) The servers are usually used by the workstations for 
    NFS.  The servers must be able to talk to each other 
    for updates, NIS, etc, and to route packets between 
    segments.

(5) In the future, there'll be another server P which
    will be the LAN's gateway to the world.  Is it
    possible to set-up P such that the workstations,
    even with their `illegal' IP addrs as given below, 
    may be able to access the web?  To push the question
    further a bit, is it possible to make a `node' 
    out of a single host address?  How?

(6) Thanks in advance for your help.

(7) Diagram:
	                                                      
           +----------------+-----------------+-----------------+
           |                |                 |                 |
       [127.1.1.1]      [127.1.1.2]       [127.1.1.3]       [127.1.1.4]
	  eth1             eth1              eth1              eth1
       +---------+      +---------+       +---------+       +---------+
       |   S1    |      |   S2    |       |   S3    |       |    P    |
       +---------+      +---------+       +---------+       +---------+
	  eth0             eth0              eth0              eth0
       [127.1.2.1]      [127.1.3.1]       [127.1.4.1]     [some legal IP#]
	   |                |                 |                 |
	   |                |                 |                 |
          D1               D2                D3               world   
       [127.1.2.0]      [127.1.3.0]       [127.1.4.0]       
       workstations     workstations      workstations 



-- joey



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