machine5:~$ ipfw add pipe 1 ip from 10.0.11.24 to 10.0.10.22
00100 pipe 1 ip from 10.0.11.24 to 10.0.10.22
machine5:~$ ipfw add pipe 2 ip from 10.0.10.22 to 10.0.11.24
00200 pipe 2 ip from 10.0.10.22 to 10.0.11.24
machine5:~$ ipfw pipe 1 config delay 2000ms bw 5000Kbit/s
machine5:~$ ipfw pipe 2 config delay 2000ms bw 5000Kbit/s
machine5:~$ ipfw pipe list
00001:   5.000 Mbit/s 2000 ms   50 sl. 0 queues (1 buckets) droptail
    mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000
00002:   5.000 Mbit/s 2000 ms   50 sl. 0 queues (1 buckets) droptail
    mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000