Capturing Packets
From Observer GigaFlow Support | VIAVI Solutions Inc.
The below command will capture the full packet (-s 0), write to the file (flows.pcap) and capture 100,000 packets from interface (-i enp2s0f0) matching packets on port 2055
tcpdump -s 0 -w flows.pcap -c 100000 -i enp2s0f0 port 2055