From: boite-a-spam@plouf.fr.eu.org   
      
   glen herrmannsfeldt a écrit :   
   > Rick Jones  wrote:   
   >   
   >>  All stations in the same broadcast domain MUST have the same MTU.   
   >   
   > Is this still true if you have more than one IP net in the same   
   > broadcast domain?   
      
   Yes.   
      
   > I haven't thought of this for some time, but it seems to me that   
   > you should be able to run separate (sub)nets on the same ethernet,   
      
   If they share the same ethernet, they are not separate. They are just   
   different subnets.   
      
   > with different MTU for the different subnets. You then need a router   
   > that can route between them.   
      
   You also need to disable ICMP redirect, otherwise hosts on different   
   subnets may by-pass the router and start to communicate directly with   
   each other when they learn the destination is directly reachable.   
      
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