sudo tshark -i eth0

sudo tshark -i eth0 "port 6633"

sudo tshark -i eth0 -T pdml > dump.xml

sudo tshark -n -i eth0 -T pdml > dump.xml

sudo tshark -O openflow_v4 -i eth0 port <openflow port>

~] tshark -G protocols | grep openflow
OpenFlow        openflow        openflow
OpenFlow 1.0    openflow_v1     openflow_v1
OpenFlow 1.3    openflow_v4     openflow_v4
OpenFlow 1.4    openflow_v5     openflow_v5