I am currently using the following command in Linux to get specifics on network problems.
tshark -r file.pcap -q -z io,stat,1,\
"COUNT(tcp.analysis.retransmission) tcp.analysis.retransmission",\
"COUNT(tcp.analysis.duplicate_ack)tcp.analysis.duplicate_ack",\
"COUNT(tcp.analysis.lost_segment) tcp.analysis.lost_segment",\
"COUNT(tcp.analysis.fast_retransmission) tcp.analysis.fast_retransmission"
This outputs a nice table with lots of good information. However, I would like to know what other columns I could add to get more things like incorrect checksums, and something that could possibly point out network congestion. Pretty much anything needed to point out performance problems.