Virtualizing my router - any experience to share? Pros/cons? (lemmy.ca)

submitted 1 month ago* (last edited 1 month ago) by GameGod@lemmy.ca to c/selfhosted@lemmy.world

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I'm thinking about moving my router to be a VM on a server in my homelab. Anyone have any experience to share about this? Any downsides I haven't thought of?

Backstory: My current pfSense router box can't keep up with my new fibre speeds because PPPOE is single threaded on FreeBSD, so as a test, I installed OpenWRT in a VM on a server I have and using VLANs, got it to act as a router for my network. I was able to validate it can keep up with the fibre speeds, so all good there. While shopping for a new routerboard, I was thinking about minimizing power and heat, and it made me realize that maybe I should just keep the router virtualized permanently. The physical server is already on a big UPS, so I could keep it running in a power outage.

I only have 1 gbps fibre and a single GbE port on the server, but I could buff the LAN ports if needed.

Any downsides to keeping your router as a VM over having dedicated hardware for it?

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[-] jubilationtcornpone@sh.itjust.works 2 points 1 month ago

I would advise against it. Separation of concerns isn't important until it is. If your host server is unavailable for any reason, now EVERYTHING is unavailable. Having your server go down is bad. Being unable to browse the internet when your host is down and you're trying to figure out why is worse.

There are also risks involved in running your firewall on the same host as all your other VM's without adding a lot of complex network configurations.

this post was submitted on 06 Feb 2025

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