+ # `udp_src_port` and `udp_dst_port` can be defined by a single port or a range. Example:
+ # udp_src_port: 80
+ # udp_dst_port: ['1024','65000']
+ # `udp_port_step`: the step between two generated ports, default is equal to '1'
+ #
+ # NOTICE:
+ # Following TRex functionalities, incrementation and decrementation of source port and destination
+ # port values occur simultaneously.
+ # So, in order to reach the highest possible number of packets, it's recommended that the range of source ports
+ # minus the range of destination ports should be different of 1
+ # i.e: |range[source_port] - range[destination_port]| = 1