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   comp.protocols.tcp-ip      TCP and IP network protocols.      14,669 messages   

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   Message 12,815 of 14,669   
   Jorgen Grahn to skendric@fhcrc.org   
   Re: interpreting "input ICMP message fai   
   23 Apr 09 18:36:21   
   
   15db2fd3   
   From: grahn+nntp@snipabacken.se   
      
   On Thu, 23 Apr 2009 10:51:25 -0700 (PDT), skendric@fhcrc.org  wrote:   
   > I have a monitoring application which emits pings.  Most of the time,   
   > those ICMP Echos leave the box, arrive at their destination, and come   
   > back as ICMP Replies -- this is good.  However, intermittently, those   
   > pings don't even leave the box.  [I know this because I have a sniffer   
   > positioned just outside the box, mirroring traffic via the switch.]   
   > Naturally, my application then thinks that *all* its monitored devices   
   > have gone down, whereupon it becomes agitated, emits pages, and so   
   > forth.   
      
   Is the word "naturally" used ironically here?  A lost packet now and   
   then is a fact of life, and no code should assume the other side is   
   down after just one lost ping.  (Or after a day of lost pings for that   
   matter.)   
      
   /Jorgen   
      
   --   
     // Jorgen Grahn           R'lyeh wgah'nagl fhtagn!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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