From: rick.jones2@hp.com   
      
   orcus@pwr.wroc.pl wrote:   
   > On 12.06.2013, Rick Jones  wrote:   
   >     All stations in the same broadcast domain MUST have the same MTU.   
      
   > It's not true. Both side of any communication in same broadcast   
   > domain must send and be able to receive with same MTU.   
      
   > For example - we have network segment with one IP subnet. MTU was   
   > increased to almost 9000 due to lot of NFS traffic. One host serving   
   > important service is running on older machine without ability to   
   > increase MTU size(we cannot replace the server too). All other hosts   
   > in subnet have static route with MTU set(in linux MTU comes from   
   > routing tables;) and it works well for almost 2 years.   
      
   Indeed, there are corner cases or exceptions or workarounds, but I   
   still prefer to start with that assertion above.  Much of the time, if   
   the communication is TCP, the TCP MSS exchange will paper-over a   
   mismatched frame/MTU size in the same broadcast domain.  But it   
   isn't really something one should count-on.   
      
   rick jones   
   --   
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