loop create
set int ip address loop0 192.168.1.1/8
set int state loop0 up

packet-generator new {						\
  name udp							\
  limit 512							\
  rate 1e4							\
  node ip4-input						\
  size 100-100							\
  interface loop0						\
  data {							\
   UDP: 192.168.1.2 - 192.168.2.255 -> 192.168.1.1		\
   UDP: 4321 -> 1234						\
    length 72							\
    incrementing 100						\
  }								\
}