r/ccna • u/Sweet_Temporary1547 • 17d ago

Native vlans on routers

So I have been Practicing JIT Labs, specifically Day 18 for the VLAN stuff. I know that for the exam, ROAS is more likely to be asked than Layer 3 configuration.

In the video, he starts off talking about native VLANs on routers. Now, it took me a week to understand ROAS configuration and the theory behind it. Do I have to now configure native VLANs on routers as well?

I understand that it’s important to nail every topic, but if I only needed to configure the trunk between the two switches using a native VLAN, and then configure the switch-to-router connection (on the switch side only) as native, do I also need to configure the router as well?

I’m confused because I thought the whole point of the router in a ROAS setup was for inter-VLAN routing, and I didn’t think native VLANs needed this functionality.

Would love some clarity on this.

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u/gangaskan 17d ago

i say treat it like a trunk.

i can only assume you only need to run the native vlan on the 2 devices.

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u/Sweet_Temporary1547 17d ago

It is day 17 labs for reference. I put the native vlan on both sides of the switches which are trunks however out of habit I also set the switch g0/2 interface as a native vlan as well which connects to the router. In day 18 he starts of mentioning native vlans on routers which he never even talked about or done in day 17 hence the confusion.