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1、安装iproute
2、限制eth0网卡的带宽为50kbit：
/sbin/tc qdisc add dev eth0 root tbf rate 50kbit latency 50ms burst 1000
3、限制带宽为50kbit后，在百兆局域网中wget下载一个大文件：
[root@localhost ~]# wget http://192.168.1.7/test.zip
--19:40:27-- http://192.168.1.7/test.zip Connecting to 192.168.1.7:80... connected. HTTP request sent, awaiting response... 200 OK Length: 23862312 (23M) [application/zip] Saving to: `test.zip' 37% [=======> ] 8,994,816 457K/s eta 27s
下载速度为457K/s，限制效果达到。
4、解除eth0网卡的带宽限制：
/sbin/tc qdisc del dev eth0 root tbf
5、对比：未作带宽限制情况下，在百兆局域网中wget下载一个大文件：
[root@localhost ~]# wget http://192.168.1.7/test.zip --19:44:33-- http://192.168.1.7/test.zip Connecting to 192.168.1.7:80... connected. HTTP request sent, awaiting response... 200 OK Length: 23862312 (23M) [application/zip] Saving to: `test.zip' 100%[==========>] 23,862,312 6.14M/s in 3.7s 19:44:36 (6.16 MB/s) - `test.zip' saved [23862312/23862312]
下载速度为6.16MB/s。
网友提问：限制带宽为50kbit后, 为什么下载速度达到457K/s? |