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

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   Message 13,239 of 14,669   
   Jorgen Grahn to All   
   TCP connections, do they survive link-la   
   02 Dec 09 12:06:56   
   
   From: grahn+nntp@snipabacken.se   
      
   Assume I am on host A and have a long-lived TCP connection to host B   
   (like a telnet or ssh session).  And then I bring my network interface   
   down, and up again (e.g. using Unix ifconfig).  Or maybe it goes down   
   and there is something automagical which brings up A's wireless link   
   instead, with the same address.   
      
   The question is this: should I expect my TCP connection to be alive   
   after this?   
      
   I think I have heard that Linux and the *BSDs make this work, but that   
   Windows kills the TCP socket when the interface disappears from under   
   it.  But that's a vague memory.  I can experiment with Linux, but not   
   with all other IP stacks out there ...   
      
   BR,   
   /Jorgen   
      
   --   
     // Jorgen Grahn    O  o   .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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