So, you might want to test whether the NIC of your box is ‘bad’, one way to do this is looking at the retransmissions.
netstat -s | grep retransmits 3535665 fast retransmits 3920918 forward retransmits 122319 retransmits in slow start 3652 sack retransmits failed
netstat -s | grep transmit 10512472 segments retransmited 733 times recovered from packet loss due to fast retransmit Detected reordering 73 times using reno fast retransmit TCPLostRetransmit: 196 400 timeouts after reno fast retransmit 3535665 fast retransmits 3920918 forward retransmits 122319 retransmits in slow start 13652 sack retransmits failed
This isn’t much use though, because you need to see how many total packets come in:
netstat -s | grep total 23799703342 total packets received
It’s possible to get the full details with netstat -s , naturally.