| | ... | --tx_src_ip | ${tx_src_ip} | --tx_dst_ip | ${tx_dst_ip}
| | ... | --tx_if | ${tx_port} | --rx_if | ${rx_port}
| | ... | --rx_arp_src_ip ${rx_arp_src_ip} | --rx_arp_dst_ip ${rx_arp_dst_ip}
| | ... | --tx_src_ip | ${tx_src_ip} | --tx_dst_ip | ${tx_dst_ip}
| | ... | --tx_if | ${tx_port} | --rx_if | ${rx_port}
| | ... | --rx_arp_src_ip ${rx_arp_src_ip} | --rx_arp_dst_ip ${rx_arp_dst_ip}