5

我是 linux 新手,我的目标是使用 tc 命令(或 ifconfig 或 iptables 等其他命令,但我认为我不需要它们)为“eth0”或“lo”创建一个简单的流量控制。

我的内核是 2.6.18-238.el5 GNU/Linux,我使用的是 redhat。

我的脚本是:

tc qdisc del dev $DEV root
tc qdisc add dev $DEV root handle 1: htb default 10
tc class add dev $DEV parent 1: classid 1:10 htb rate $DNLD
tc filter add dev $DEV parent 1: protocol ip u32 match ip dport $input_port 0xffff flowid 1:10

$DNLD 是带宽限制,$DEV 是 eth0 或 lo,$input_port 是我要限制的端口。

我在互联网上阅读了很多页面并理解应该这样写,但是这行不限制特定端口,而是限制所有端口。

我也尝试使用“运动”,但它也不起作用。所以我不明白问题是什么。

另一个奇怪的事情是带宽限制似乎正在工作,并且重置线似乎也在工作,(这是第一行: tc qdisc del dev $DEV root )

但是,我写后的输出行仍然是:“RTNETLINK 答案:没有这样的文件或目录”,我不知道为什么以及它是否会造成任何损坏。

如果您需要任何其他信息,请告诉我。如果有人能够帮助我,我会很高兴。提前谢谢。

4

1 回答 1

2

我不知道这是否正是您要寻找的,但这是您可以编辑和运行的脚本。我用它来限制我的连接和测试网络应用程序。

#!/bin/bash
#
#  tc uses the following units when passed as a parameter.
#  kbps: Kilobytes per second 
#  mbps: Megabytes per second
#  kbit: Kilobits per second
#  mbit: Megabits per second
#  bps: Bytes per second 
#       Amounts of data can be specified in:
#       kb or k: Kilobytes
#       mb or m: Megabytes
#       mbit: Megabits
#       kbit: Kilobits
#  To get the byte figure from bits, divide the number by 8 bit
#

#
# Name of the traffic control command.
TC=/sbin/tc

# The network interface we're planning on limiting bandwidth.
IF=`ip addr | grep 2: | cut -d' ' -f2 | cut -d: -f1`

# Latency
LAT_1=200ms          # Base latency
LAT_2=50ms           # Plus or minus
LAT_3=25%            # Based on previous packet %
# Dropping packets
DROP_1=5%            # Base probability
DROP_2=25%           # Based on previous packet %
# Bandwidth
#DNLD=33kbps          # DOWNLOAD Limit
#UPLD=33kbps          # UPLOAD Limit
DNLD=1Mbps          # DOWNLOAD Limit
UPLD=1Mbps          # UPLOAD Limit

# IP address of the machine we are controlling
IP=`ip addr | grep "inet " | tail -1 | cut -d' ' -f6 | cut -d/ -f1`

# Filter options for limiting the intended interface.
U32="$TC filter add dev $IF protocol ip parent 1:0 prio 1 u32"

# We'll use Hierarchical Token Bucket (HTB) to shape bandwidth.
# For detailed configuration options, please consult Linux man
# page.

#$TC qdisc add dev $IF root handle 2: netem delay $LAT_1 $LAT_2 $LAT_3     loss $DROP_1 $DROP_2
$TC qdisc add dev $IF root handle 2: netem delay $LAT_1 $LAT_2 $LAT_3 loss $DROP_1 $DROP_2
$TC qdisc add dev $IF parent 2: handle 1: htb default 30
$TC class add dev $IF parent 1: classid 1:1 htb rate $DNLD
$TC class add dev $IF parent 1: classid 1:2 htb rate $UPLD
$U32 match ip dst $IP/32 flowid 1:1
$U32 match ip src $IP/32 flowid 1:2

# The first line creates the root qdisc, and the next three lines
# create three child qdisc that are to be used to shape download 
# and upload bandwidth.
#
# The 5th and 6th line creates the filter to match the interface.
# The 'dst' IP address is used to limit download speed, and the 
# 'src' IP address is used to limit upload speed.

echo Limit to $DNLD on $IF for $IP
于 2017-10-27T12:14:19.537 回答