From: thedeerhunter1978@movie.uni   
      
   On 2012-06-01 23:25:51 +0000, Rick Jones said:   
      
   > Perhaps because if Y added information to its ARP cache for any old   
   > broadcast it saw, which wasn't a request for its own IP address, it   
   > could very quickly have a very large ARP cache.   
      
   Yes, that is a possible explanation but I could not confirm it from   
   reading the man pages of arping and arp.   
      
      
   > Is your timing really that tight that you cannot affort the time it   
   > would take Y to ARP for X when Y wanted to start sending traffic to X?   
      
   I simplified the scenario for this post.  I do need to update a number   
   of ARP caches at given intervals, without knowing the IP and MAC   
   addresses of the neighbour hosts.   
      
   Thanks for your response.   
      
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