RTNETLINK 回答:使用 netem 和 tc 时文件存在

RTNETLINK 回答:使用 netem 和 tc 时文件存在

因此,当我在主虚拟机中输入此命令时,只会出现此错误:

 sudo tc qdisc add dev eth0 root netem delay 97ms
RTNETLINK answers: File exists

有什么办法可以解决这个问题吗?

我在 Ubuntu 中运行这个命令:

uname -a
Linux anmol-vm1-new 3.13.0-46-generic #79-Ubuntu SMP Tue Mar 10 20:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@anmol-vm1-new:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

以下是文件的内容/etc/network/interfaces

auto lo
iface lo inet loopback
source /etc/network/interfaces.d/*.cfg


ls /etc/network/interfaces.d/
eth0.cfg

以下是我所拥有的/etc/network/interfaces.d/eth0.cfg

# The primary network interface
auto eth0
iface eth0 inet dhcp

此外我还收到以下错误:

ubuntu@anmol-vm1-new:/home/hadoop/yarnpp/workloads/RESULTS$ tc qdisc change dev eth0 root netem delay 100ms
RTNETLINK answers: Operation not permitted
ubuntu@anmol-vm1-new:/home/hadoop/yarnpp/workloads/RESULTS$ sudo tc qdisc change dev eth0 root netem delay 100ms
RTNETLINK answers: Invalid argument

你可能还想看看这个StackOverflow 问题我曾要求限制带宽。

ifconfig -a
eth0      Link encap:Ethernet  HWaddr fa:16:3e:b4:22:7c  
          inet addr:10.0.1.190  Bcast:10.0.1.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:feb4:227c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1454  Metric:1
          RX packets:603022138 errors:0 dropped:0 overruns:0 frame:0
          TX packets:132788011 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:633486216278 (633.4 GB)  TX bytes:798520828666 (798.5 GB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:367293839 errors:0 dropped:0 overruns:0 frame:0
          TX packets:367293839 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:547056723183 (547.0 GB)  TX bytes:547056723183 (547.0 GB)

答案1

解决方案如下:

sudo tc qdisc del dev eth0 root
sudo tc qdisc add dev eth0 root netem delay 100ms

答案2

更短的解决方案:

sudo tc qdisc replace dev eth0 root netem delay 100ms

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