sysctl -w net.inet.ip.intr_queue_maxlen=500
ipfw -f flush
ipfw -f pipe flush
ipfw add pipe 1 ip from 10.5.0.2 to 10.6.0.2 in
ipfw add pipe 2 ip from 10.6.0.2 to 10.5.0.2 out
ipfw pipe 1 config bw 100M queue 220 delay 64
ipfw pipe 2 config bw 100M queue 220 delay 64