对机器特定端口增加网络延迟

参考于https://blog.csdn.net/scdxmoe/article/details/78532425?utm_source=blogxgwz8

例如：对本地网卡上30001 端口延迟5秒

tc qdisc add dev lo root handle 1: prio bands 4
tc qdisc add dev lo parent 1:4 handle 40: netem delay 5s
tc filter add dev lo protocol ip parent 1:0 prio 4 u32 match ip dport 30001  0xffff flowid 1:4

列出filter的信息

 tc -s filter show dev lo

filter parent 1: protocol ip pref 4 u32

filter parent 1: protocol ip pref 4 u32 fh 800: ht divisor 1

filter parent 1: protocol ip pref 4 u32 fh 800::800 order 2048 key ht 800bkt 0 flowid 1:4 (rule hit 672 success 76)

match 00003714/0000ffff at 20 (success 76 )

删除filter

 tc filter del dev lo pref 4