| 47 | |
| 48 | == Experiment == |
| 49 | |
| 50 | Now try changing the characteristics of the link and measuring how they affect UDT and TCP performance. You will need to log into your delay node to change the link characteristics. Then, on your delay node, use this command: |
| 51 | |
| 52 | {{{ |
| 53 | %sudo ipfw pipe show |
| 54 | }}} |
| 55 | |
| 56 | You'll get something like this: |
| 57 | {{{ |
| 58 | 60111: 4.000 Mbit/s 0 ms 50 sl. 1 queues (1 buckets) droptail |
| 59 | mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000 |
| 60 | BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp |
| 61 | 0 udp 0.0.0.0/68 255.255.255.255/67 170991 230659480 0 0 149 |
| 62 | 60121: 4.000 Mbit/s 0 ms 50 sl. 1 queues (1 buckets) droptail |
| 63 | mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000 |
| 64 | BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp |
| 65 | 0 ip 207.167.231.176/0 195.123.192.8/6 20538 1663157 0 0 0 |
| 66 | }}} |