From: rick.jones2@hp.com   
      
   Martijn Lievaart  wrote:   
   > Retransmission should be after 0.3 seconds, not 3 seconds, so highly   
   > unlikely.   
      
   Which stack first retransmits SYNs at only 0.3 seconds?  Not that I'm   
   a slavish adherent to IETF constants from the past, but I thought the   
   chapter and verse called for an initial TCP retransmission timeout of   
   3 seconds.  For example, on my Ubuntu 11.04 system running a 2.6.38   
   kernel I see:   
      
   raj@tardy:~/netperf2_trunk/src$ tcpdump -i eth0 port 12865   
   tcpdump: verbose output suppressed, use -v or -vv for full protocol decode   
   listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes   
   13:49:43.116918 IP tardy.56156 > testname.netperf: Flags [SEW], seq   
   1684409409, win 14600, options [mss 1460,sackOK,TS val 44556412 ecr   
   0,nop,wscale 7], length 0   
   13:49:46.123118 IP tardy.56156 > testname.netperf: Flags [SEW], seq   
   1684409409, win 14600, options [mss 1460,sackOK,TS val 44556713 ecr   
   0,nop,wscale 7], length 0   
   13:49:52.133103 IP tardy.56156 > testname.netperf: Flags [SEW], seq   
   1684409409, win 14600, options [mss 1460,sackOK,TS val 44557314 ecr   
   0,nop,wscale 7], length 0   
   13:50:04.153050 IP tardy.56156 > testname.netperf: Flags [SEW], seq   
   1684409409, win 14600, options [mss 1460,sackOK,TS val 44558516 ecr   
   0,nop,wscale 7], length 0   
      
   rick jones   
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