对LINUX服务器网卡进行带宽限制的办法：

1、安装iproute yum -y install iproute

2、限制eth0网卡的带宽为500kbit： /sbin/tc qdisc add dev eth0 root tbf rate 500kbit latency 50ms burst 15kb

TBF Example（限制带宽为1mbit） To attach a TBF with a sustained maximum rate of 1mbit/s, a peakrate of 2.0mbit/s, a 10kilobyte buffer, with a pre-bucket queue size limit calculated so the TBF causes at most 70ms of latency, with perfect peakrate behavior, enter:

tc qdisc add dev eth0 root tbf rate 1mbit burst 10kb latency 70ms peakrate 2mbit minburst 1540

3、解除eth0网卡的带宽限制： /sbin/tc qdisc del dev eth0 root

4、列出已有的策略：

tc -s qdisc ls dev eth0

5、启动时自动加载带宽限制策略：

vim /etc/rc.local

加入： /sbin/tc qdisc add dev eth0 root tbf rate 500kbit latency 50ms burst 15kb

参考资料：http://www.cyberciti.biz/faq/linux-traffic-shaping-using-tc-to-control-http-traffic/

server004：所使用的命令 sudo tc qdisc add dev em1 root tbf rate 200mbit burst 10kb latency 70ms

实际速度在47M/s左右