Does WSL 2 have 8021q Module?

[Leo1726]

Environment

Windows build number: [Microsoft Windows [Version 10.0.19042.867]]
Your Distribution version: [Ubuntu Release:18.04]
Whether the issue is on WSL 2 and/or WSL 1: [Linux version 5.4.72-microsoft-standard-WSL2 (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP Wed Oct 28 23:40:43 UTC 2020]

Steps to reproduce

WSL logs:

I want to enable 8021q module which could let me to set the VLAN. But, it seems that there is no 8021q module in the kernel.
How could I enable or add this function/module?

[WSLUser]

In https://github.com/microsoft/WSL2-Linux-Kernel/blob/linux-msft-wsl-5.4.y/Microsoft/config-wsl you have

CONFIG_VLAN_8021Q=y
# CONFIG_VLAN_8021Q_GVRP is not set
# CONFIG_VLAN_8021Q_MVRP is not set

So it's enabled by default. If you need GVRP or MVRP, those will need to be manually enabled with a custom compile of the kernel. Secondly, WSL2 doesn't yet support kernel modules natively. The kernel is monolithic as a result. Lastly, I notice your Linux kernel is out of date. Try updating it.

[therealkenc]

That repro is missing an add and needs root.

Try sudo vconfig add eth0 10 and see if it takes.

[Leo1726]

Got it！Thanks! @therealkenc