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tc command gives "Error: Specified qdisc not found" on RHEL 8

 SOLUTION UNVERIFIED - 已更新 2019年四月23日01:38 - 

English 

环境

• Red Hat Enterprise Linux 8

问题

• Using qdisks via the tc command fails with the following error

Raw

 Error: Specified qdisc not found

决议

• To properly use qdiscs, install the kernel-modules-extra package:

Raw

# yum -y install kernel-modules-extra

根源

In RHEL 8 qdiscs are shipped as kernel modules in package named kernel-modules-extra.

Raw

/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_atm.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_cbq.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_choke.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_drr.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_dsmark.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_gred.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_mqprio.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_multiq.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_netem.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_qfq.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_red.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_sfb.ko.xz
/lib/modules/4.18.0-32.el8.x86_64/extra/net/sched/sch_teql.ko.xz