Summary of delay commands for simulating packet loss in centos

Summary of delay commands for simulating packet loss in centos
Summary of delay commands for simulating packet loss in linux:


First, run the ifconfig command.



1. Set latency


Latency: sudo tc qdisc add dev eth0 root netem delay 30 ms
Latency in the range (10-50 ms): sudo tc qdisc add dev eth0 root netem delay 30 ms 20 ms
Set the delay to 30 ms, and about 20% packets will delay sending sudo tc qdisc add dev eth0 root netem delay 30 ms 20 ms 20%


Display delay settings: sudo tc qdisc show
Modification delay: sudo tc qdisc change dev eth0 root netem delay 40 ms
Deletion delay: sudo tc qdisc del dev eth0 root netem delay 40 ms




2. Set packet loss


Packet loss: sudo tc qdisc add dev eth0 root netem loss 10%.
10% of data packets are randomly dropped. The success rate is 20%: sudo tc qdisc add dev eth0 root netem loss 10% 20%.
Delete packet loss: sudo tc qdisc del dev eth0 root netem loss 10%


3. Duplicate simulated packages


1% duplicate packets are randomly generated: sudo tc qdisc add dev eth0 root netem duplicate 1%




4. data packet corruption


0.2% corrupted data packets are randomly generated: sudo tc qdisc add dev eth0 root netem packet upt 0.2%


5. unordered data packets


25% of data packets (related to 50%) will be sent immediately, and the other delay is 10 seconds: sudo tc qdisc change dev eth0 root netem delay 10 ms reorder 25% 50%


6. Check the configured network conditions for production


Sudo tc qdisc show dev eth0


7. Delete tc rules


Sudo tc qdisc del dev eth0 root