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Linux Operating System (MOSC)

Quesition about linux traffic control (tc) on Linux 8.9 and 9.4

May 24, 2024 5:41PM edited Jul 21, 2024 2:23AM in Linux Operating System (MOSC) 1 commentAnswered ✓

Hi, I am trying to simulate network issues to test my configuration. However, I found a strange error when invoking tc command, i.e.,

[root@<REMOVED> ~]# nmcli con show

NAME  UUID                                  TYPE      DEVICE

eth0  XXXX2888-9075-3785-ae25-5cee3f19XXXX  ethernet  eth0

lo    XXXX8cbd-33bf-466b-85f5-e10cf2b0XXXX  loopback  lo

[root@<REMOVED> ~]# tc qdisc add dev eth0 root netem delay 1000ms

Error: Specified qdisc kind is unknown.

[root@<REMOVED> ~]#

I have confirmed that I have kernel-modules-extra installed, but when I tried to load sch_netem module, it complains files not found.

[root@<REMOVED> ~]# modprobe sch_netem

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linux

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