tcpreplay - I am trying to replay a pcap file that someone else captured for me (Im assuming they used tcpdump) -

linux command:

tcpreplay -i replay -l 60000 -p 1000 20160627-ssmon01.pcap 

output:

sending out replay processing file: 20160627-080001-ssmon01-napa0.pcap  fatal error: error opening pcap file: unknown file format 

i not understand why happening? can me out?

best run tcpcapinfo comes tcpreplay suite. designed identify wrong corrupted files rather give info regarding file not corrupted.