Linux下用tc控制网络延时和丢包率

 

tc修改网络延时：  

sudo tc qdisc add dev eth0 root netem delay 1000ms

删除策略：

sudo tc qdisc del dev eth0 root netem delay 1000ms

 

验证效果：

PING myhost (192.168.0.2) 56(84) bytes of data.
64 bytes from myhost (192.168.0.2): icmp_seq=1 ttl=64 time=1000 ms

64 bytes from myhost (192.168.0.2): icmp_seq=1 ttl=64 time=1000 ms

64 bytes from myhost (192.168.0.2): icmp_seq=1 ttl=64 time=1000 ms

修改丢包率：
sudo tc qdisc add dev eth0 root netem loss 10%

删除策略：
sudo tc qdisc del dev eth0 root netem loss 10%

=====================================================================

• 查看流量管理：   tc     qdisc    show
• 配置网络延时：

• # tc qdisc del dev eth0 root netem loss 10%[root@AutoTest ~]# tc qdisc showqdisc pfifo_fast 0: dev eth0 root refcnt 2 bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1[root@AutoTest ~]# tc qdisc add dev eth0 root netem delay 1000ms [root@AutoTest ~]# ping 192.168.0.1PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=2001 ms64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=1001 ms^C--- 192.168.0.1 ping statistics ---6 packets transmitted, 5 received, 16% packet loss, time 5846msrtt min/avg/max/mdev = 1000.520/1200.819/2001.001/400.092 ms, pipe 3[root@AutoTest ~]# tc qdisc del dev eth0 root netem delay 1000ms [root@AutoTest ~]# ping 192.168.0.1PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.465 ms64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.546 ms^C--- 192.168.0.1 ping statistics ---2 packets transmitted, 2 received, 0% packet loss, time 1841msrtt min/avg/max/mdev = 0.465/0.505/0.546/0.046 ms[root@AutoTest ~]# 

• 配置网络丢包率
  # tc qdisc del dev eth0 root netem loss 10%RTNETLINK answers: Invalid argument[root@AutoTest ~]# tc qdisc add dev eth0 root netem loss 10%[root@AutoTest ~]# tc qdisc showqdisc netem 8005: dev eth0 root refcnt 2 limit 1000 loss 10%[root@AutoTest ~]# ping 192.168.0.1 -n 20PING 20 (0.0.0.20) 56(124) bytes of data.^C--- 20 ping statistics ---7 packets transmitted, 0 received, 100% packet loss, time 6371ms[root@AutoTest ~]# ping 192.168.0.1 -c 20PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.533 ms64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.506 ms64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.471 ms64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=0.550 ms64 bytes from 192.168.0.1: icmp_seq=7 ttl=64 time=0.474 ms64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=0.499 ms64 bytes from 192.168.0.1: icmp_seq=10 ttl=64 time=0.541 ms64 bytes from 192.168.0.1: icmp_seq=11 ttl=64 time=0.470 ms64 bytes from 192.168.0.1: icmp_seq=12 ttl=64 time=0.531 ms64 bytes from 192.168.0.1: icmp_seq=13 ttl=64 time=0.476 ms64 bytes from 192.168.0.1: icmp_seq=14 ttl=64 time=0.503 ms64 bytes from 192.168.0.1: icmp_seq=15 ttl=64 time=0.508 ms64 bytes from 192.168.0.1: icmp_seq=16 ttl=64 time=0.541 ms64 bytes from 192.168.0.1: icmp_seq=19 ttl=64 time=0.531 ms64 bytes from 192.168.0.1: icmp_seq=20 ttl=64 time=0.536 ms--- 192.168.0.1 ping statistics ---20 packets transmitted, 15 received, 25% packet loss, time 19999msrtt min/avg/max/mdev = 0.470/0.511/0.550/0.033 ms# tc qdisc del dev eth0 root netem loss 10%[root@AutoTest ~]# ping 192.168.0.1 -c 20PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.827 ms64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.508 ms64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.506 ms64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=0.574 ms64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=0.555 ms64 bytes from 192.168.0.1: icmp_seq=6 ttl=64 time=0.495 ms64 bytes from 192.168.0.1: icmp_seq=7 ttl=64 time=0.517 ms64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=0.529 ms64 bytes from 192.168.0.1: icmp_seq=9 ttl=64 time=0.515 ms64 bytes from 192.168.0.1: icmp_seq=10 ttl=64 time=0.571 ms64 bytes from 192.168.0.1: icmp_seq=11 ttl=64 time=0.508 ms64 bytes from 192.168.0.1: icmp_seq=12 ttl=64 time=0.533 ms64 bytes from 192.168.0.1: icmp_seq=13 ttl=64 time=0.526 ms64 bytes from 192.168.0.1: icmp_seq=14 ttl=64 time=0.520 ms64 bytes from 192.168.0.1: icmp_seq=15 ttl=64 time=0.532 ms64 bytes from 192.168.0.1: icmp_seq=16 ttl=64 time=0.549 ms64 bytes from 192.168.0.1: icmp_seq=17 ttl=64 time=0.527 ms64 bytes from 192.168.0.1: icmp_seq=18 ttl=64 time=0.575 ms64 bytes from 192.168.0.1: icmp_seq=19 ttl=64 time=0.534 ms64 bytes from 192.168.0.1: icmp_seq=20 ttl=64 time=0.556 ms--- 192.168.0.1 ping statistics ---20 packets transmitted, 20 received, 0% packet loss, time 19000msrtt min/avg/max/mdev = 0.495/0.547/0.827/0.074 ms[root@AutoTest ~]#