Arch Linux

sweet_potato_0419

Member

Registered: 2019-10-09

Posts: 19

[Solved] Cannot change default qdisc using sysctl

I created a file /etc/sysctl.d/00-network-optimization.conf with content:

...
net.core.default_qdisc = fq
...

All configurations work except the default_qdisc, which is always fq_codel.  The system is a server using systemd-networkd.  Why is that?  What's the proper way to do it?

Last edited by sweet_potato_0419 (2023-03-19 14:41:17)

sweet_potato_0419

Member

Registered: 2019-10-09

Posts: 19

Re: [Solved] Cannot change default qdisc using sysctl

Okay, it seems systemd-networkd changed the default qdisc to fq_codel by default.  Adding the following config to .network config solves the issue

[FairQueueing]
Parent=root