[Ethereal-users] help with trace

["Tim Michals" <tcmichals@xxxxxxx>]

All,
Here is summary output, I'm trying to understand the trace and how this 
error is appearing:

No.     Time        Source                Destination           Protocol 
Info
   497 1.485957    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=478574 Win=65535 Len=0
   498 1.488912    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=478574 Ack=0 Win=4882 Len=1460
   499 1.491854    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=480034 Ack=0 Win=4882 Len=1460
   500 1.491873    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=481494 Win=65535 Len=0
   501 1.496921    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=481494 Ack=0 Win=4882 Len=1460
   502 1.499907    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=482954 Ack=0 Win=4882 Len=1460
   503 1.499925    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=484414 Win=65535 Len=0
   504 1.506937    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=487334 Win=65535 Len=0
   505 1.513872    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=490254 Win=65535 Len=0
   506 1.529892    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=493032 Win=65535 Len=0
   507 1.536946    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=495952 Win=65535 Len=0
   508 1.543941    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=498872 Win=65535 Len=0
   509 1.549945    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=501792 Win=65535 Len=0
   510 1.557944    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=504712 Win=65535 Len=0
   511 1.575907    192.168.7.1           192.168.7.2           TCP      
2913 > 21325 [ACK] Seq=0 Ack=507490 Win=65535 Len=0
   512 1.942997    192.168.7.2           192.168.7.1           TCP      
[TCP Previous segment lost] 21325 > 2913 [PSH, ACK] Seq=624632 Ack=10 
Win=4872 Len=1460
   513 1.943048    192.168.7.1           192.168.7.2           TCP      
[TCP Previous segment lost] 2913 > 21325 [ACK] Seq=10 Ack=626092 Win=65535 
Len=0
   514 1.946988    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=626092 Ack=10 Win=4872 Len=1460
   515 1.949965    192.168.7.2           192.168.7.1           TCP      
21325 > 2913 [PSH, ACK] Seq=627552 Ack=10 Win=4872 Len=1460

What I don't understand 504-513, the packet stream is ok up until this 
point, but to me 504 is an ak to a frame that does not exist? Then 512 
starts, like there was of several frames in a segment?  Is this correct?