用乜軟件測試nat throughput?

見以前有人測試router throughput, 好似係用一些command形式的軟件
由於而家搵唔返以前的測試post, 想問下應該用甚麼軟件測試?

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試完個result唔係好明白, 兩次command唯一唔同係-w 500M同100M
兩次都係同一部機, 同一個network
點解兩次結果差咁遠? 第一次平均有2XM, 第二次得1XM?
而且頭五秒同最後五秒, 個速度係快得好緊要

C:\iperf>iperf -c 192.168.1.109 -w 500M -t 60 -i 5
------------------------------------------------------------
Client connecting to 192.168.1.109, TCP port 5001
TCP window size:  500 MByte
------------------------------------------------------------
[  3] local 192.168.1.2 port 53548 connected with 192.168.1.109 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 5.0 sec   518 MBytes   869 Mbits/sec
[  3]  5.0-10.0 sec  17.4 MBytes  29.2 Mbits/sec
[  3] 10.0-15.0 sec  14.8 MBytes  24.7 Mbits/sec
[  3] 15.0-20.0 sec  16.4 MBytes  27.5 Mbits/sec
[  3] 20.0-25.0 sec  17.4 MBytes  29.2 Mbits/sec
[  3] 25.0-30.0 sec  17.2 MBytes  28.9 Mbits/sec
[  3] 30.0-35.0 sec  17.4 MBytes  29.2 Mbits/sec
[  3] 35.0-40.0 sec  17.9 MBytes  30.0 Mbits/sec
[  3] 40.0-45.0 sec  17.4 MBytes  29.2 Mbits/sec
[  3] 45.0-50.0 sec  17.2 MBytes  28.9 Mbits/sec
[  3] 50.0-55.0 sec  17.6 MBytes  29.6 Mbits/sec
[  3] 55.0-60.0 sec  18.0 MBytes  30.2 Mbits/sec
[  3]  0.0-60.1 sec   707 MBytes  98.7 Mbits/sec

C:\iperf>iperf -c 192.168.1.109 -w 100M -t 60 -i 5
------------------------------------------------------------
Client connecting to 192.168.1.109, TCP port 5001
TCP window size:  100 MByte
------------------------------------------------------------
[  3] local 192.168.1.2 port 53552 connected with 192.168.1.109 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 5.0 sec   109 MBytes   183 Mbits/sec
[  3]  5.0-10.0 sec  8.88 MBytes  14.9 Mbits/sec
[  3] 10.0-15.0 sec  9.38 MBytes  15.7 Mbits/sec
[  3] 15.0-20.0 sec  7.62 MBytes  12.8 Mbits/sec
[  3] 20.0-25.0 sec  7.50 MBytes  12.6 Mbits/sec
[  3] 25.0-30.0 sec  8.12 MBytes  13.6 Mbits/sec
[  3] 30.0-35.0 sec  7.75 MBytes  13.0 Mbits/sec
[  3] 35.0-40.0 sec  8.75 MBytes  14.7 Mbits/sec
[  3] 40.0-45.0 sec  8.88 MBytes  14.9 Mbits/sec
[  3] 45.0-50.0 sec  9.38 MBytes  15.7 Mbits/sec
[  3] 50.0-55.0 sec  9.62 MBytes  16.1 Mbits/sec
[  3] 55.0-60.0 sec  9.12 MBytes  15.3 Mbits/sec
[  3]  0.0-60.1 sec   204 MBytes  28.5 Mbits/sec

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IPERF SET兩邊TEST

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