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Horsepower required for 10 Gbit router? (self.selfhosted)

submitted 1 week ago by kalleboo to c/selfhosted

44 comments fedilink hide all child comments

My internet connection is getting upgraded to 10 Gbit next week. I’m going to start out with the rental router from the ISP, but my goal is to replace it with a home-built router since I host a bunch of stuff and want to separate my out home Wi-Fi, etc onto VLANs. I’m currently using the good old Ubiquiti USG4. I don’t need anything fancy like high-speed VPN tunnels (just enough to run SSH though), just routing IPv6 and IPv4 tunneling (MAP-E with a static IP) as the new connection is IPv6 native.

After doing a bit of research the Lenovo ThinkCenter M720q has caught my eye. There are tons of them available locally and people online seem to have good luck using them for router duties.

The one thing I have not figured out is what CPU option I should go for? There’s the Celeron G4900T (2 core), Core i3 8100T (4 core), and Core i5 (6 core). The former two are pretty close in price but the latter costs twice as much as anything else.

Doing research I get really conflicting results, with half of people saying that just routing IP even 10 Gbit is a piece of cake for any decently modern CPU and others saying they experienced bottlenecks.

I’ve also seen comments mentioning that the BSD-based routing platforms like pfSense are worse for performance than Linux-based ones like OpenWRT due to the lack of multi-threading in the former, I don’t know if this is true.

Does anyone here have any experience routing 10 Gbit on commodity hardware and can share their experiences?

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[–] MercuryGenisus 56 points 1 week ago (16 children)

I am saddened to see that this thread had no mention of how many horses it takes to run a router. What do y'all think? Would one be enough? It would need to work in shifts to keep up time at 100%. Maybe 3 to be safe?

[–] kalleboo 12 points 1 week ago

We also need to consider the practical aspects. Who mucks after the horses? Who feeds them? Do we need a stall? Does it need to be air conditioned in the summer/winter?

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