TCP 3 Way Handshake - retranmission
I have a issue with a client copying data from a server (Windows is the OS)
I did a capture and noticed a large number of TCP retranmissions
This also includes the 3 way hand shake with retranmissions
client sends syn - 5 retranmissions is done of this packet
server send ack to the syn - 3 retranmissions done of this packet
client ack - 3 retranmissions done
TCP Retranmissions occurs through out the copy of the file and in the end Windows gives us with an error copying the file
What could be the root cause of this packet loss or some kind of assymetric routing
The round trip between in the handshake is 20 milliseconds
Without actually seeing the packet capture I would guess you need to fix something on the server. Or reduce the workload as it may be a sign of overloading the server.
But it also depends on where you make a packet capture. In an ideal world I would make the same packet capture on at least the client and the server. so you can determine if this might be a client, server or network issue.
I have requested a packet capture from the server side.