服务器评测需要对网关做流量控制，针对IP和网段做控制，也有结合iptables实现方式，可能也有针对内外网的服务器，规则明白了，都很容易。
下面是shell脚本，非iptables方式：
#!/bin/bash
# Set the following values to somewhat less than your actual download
# and uplink speed. In kilobits. Also set the device that is to be shaped.
#INGOING traffic (gateway)
IN=eth0
#what ip do you want to limit
INET=”192.168.138.”
IPS=”100″
IPE=”254″
#Total DOWNLINK
DOWN=”100mbit”
#ensure rate speed of DOWNLINK
DOWNLOADrate=”100kbit”
#Allow max rate speed of DOWNLINK
DOWNLOADceil=”250kbit”
start(){
#clean eth1 eth0 existing down- and uplink qdiscs, hide errors
/sbin/tc qdisc del dev $IN root 2>/dev/null
# install root htb of downlink and uplink
# main class
/sbin/tc qdisc add dev $IN root handle 1: htb
/sbin/tc class add dev $IN parent 1: classid 1:1 htb rate $DOWN ceil $DOWN
#simgle ip limit
/sbin/tc class add dev $IN parent 1:1 classid 1:2 htb rate $DOWNLOADrate ceil $DOWNLOADrate
/sbin/tc qdisc add dev $IN parent 1:2 sfq perturb 2
/sbin/tc filter add dev $IN protocol ip parent 1: prio 49 u32 match ip dst 192.168.138.10 flowid 1:2
/sbin/tc filter add dev $IN protocol ip parent 1: prio 49 u32 match ip dst 192.168.2.0/32 flowid 1:2
#net1 limit
for (( i=$IPS; i<=$IPE; i=i+1 ))
do
#####Control DOWNLINK
/sbin/tc class add dev $IN parent 1:1 classid 1:1$i htb rate $DOWNLOADrate ceil $DOWNLOADceil
/sbin/tc qdisc add dev $IN parent 1:1$i sfq perturb 1$i
/sbin/tc filter add dev $IN protocol ip parent 1: prio 50 u32 match ip dst $INET$i flowid 1:1$i
done
#net2 limit
#for (( i=$IPS; i<=$IPE; i=i+1 ))
#do
# #####Control DOWNLINK
# /sbin/tc class add dev $IN parent 1:1 classid 1:2$i htb rate $DOWNLOADrate ceil $DOWNLOADceil
# /sbin/tc qdisc add dev $IN parent 1:2$i sfq perturb 2$i
# /sbin/tc filter add dev $IN protocol ip parent 1: prio 50 u32 match ip dst $INET$i flowid 1:2$i
#done
#Other traffic
/sbin/tc filter add dev $IN protocol ip parent 1: prio 2 u32 match ip dst 0.0.0.0/32 flowid 1:1
}
stop(){
echo -n “(Delete all qdisc……)”
(/sbin/tc qdisc del dev $IN root 2>/dev/null && echo “ok.Delete sucessfully!”) || echo “error.”
}
#show status
status() {
echo “1.show qdisc $IN:———————————————-“
/sbin/tc -s qdisc show dev $IN
echo “2.show class $IN:———————————————-“
N1=`/sbin/tc class show dev $IN | wc -l`
if [ $N1 == 0 ];then
echo “NULL, OFF Limiting “
else
/sbin/tc -s class show dev $IN
echo “It work”
fi
}
#show help
usage() {
echo “(usage): `basename $0` [start | stop | restart | status ]”
echo “help:”
echo “start — TC Flow Control start”
echo “stop — TC Flow Control stop”
echo “restart — TC Flow Control restart”
echo “status — TC Show all TC Qdisc and class”
}
case “$1” in
start)
( start && echo “Flow Control! TC started!” ) || echo “error.”
exit 0
;;
stop)
( stop && echo “Flow Control TC stopped!” ) || echo “error.”
exit 0
;;
restart)
stop
start
echo “Flow Control restart”
;;
status)
status
;;
*) usage
exit 1
;;
esac
测试：
开启流量控制TC：
# ./tc_last.sh start
有限制的IP：192.168.138.131
# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:DA:56:1C
inet addr:192.168.138.131 Bcast:192.168.138.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1811422 errors:0 dropped:0 overruns:0 frame:0
TX packets:1083449 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:943250761 (899.5 MiB) TX bytes:87045802 (83.0 MiB)
# wget http://ftp13.enet.com.cn:88/pub/multimedia/video/uvs9_trial_e_rtm.rar
–2013-08-08 17:44:01– http://ftp13.enet.com.cn:88/pub/multimedia/video/uvs9_trial_e_rtm.rar
Resolving ftp13.enet.com.cn… 122.224.6.16
Connecting to ftp13.enet.com.cn|122.224.6.16|:88… connected.
HTTP request sent, awaiting response… 200 OK
Length: 180175741 (172M) [application/octet-stream]
Saving to: `uvs9_trial_e_rtm.rar.17
无限制IP：192.168.138.99
# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:88:EC:85
inet addr:192.168.138.99 Bcast:192.168.138.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:88578 errors:0 dropped:0 overruns:0 frame:0
TX packets:43771 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19401052 (18.5 MiB) TX bytes:6876868 (6.5 MiB)
# wget http://ftp13.enet.com.cn:88/pub/multimedia/video/uvs9_trial_e_rtm.rar
–2013-07-16 22:57:10– http://ftp13.enet.com.cn:88/pub/multimedia/video/uvs9_trial_e_rtm.rar
Resolving ftp13.enet.com.cn… 122.224.6.16
Connecting to ftp13.enet.com.cn|122.224.6.16|:88… connected.
HTTP request sent, awaiting response… 200 OK
Length: 180175741 (172M) [application/octet-stream]
Saving to: `uvs9_trial_e_rtm.rar.2
效果还是很显著的，就是和设置的流量范围有偏差，有待继续研究！
