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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Core i3 is fine, celeron can route, but you don’t have as much headroom, or room for firewall rules, etc. Recommend Intel x520 or mellanox cx3 or newer, though the cx2 is perfectly fine.
The bs about bsd being slower is maybe 15 years old at best?
Bsd is a monster for routing.
Run 25gbe routing, still can get by on your 4 core, but I throw some serious xeons at it anyway.
I don’t know the answer, but I do know I’d at least start off looking for hardware with a dedicated ASIC for routing, not general-purpose PC hardware doing routing with the CPU.
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?
Considering a typical horse produces about 1-14 HP*, it’s possible to run the horse for several hours at a time, change a battery, and run an efficient router off of it each day.
*sauce: https://www.sciencefocus.com/science/how-much-horsepower-does-a-horse-have
Switches and routers are pretty low-power, so we could probably get away with some form of body heat -> electricity thing. Or a battery and put the horse on a treadmill every so often.
This is why I came here. I think you’d need at least three. One to work while the other sleeps, and a spare in case one gets injured.
3 horses = 3 horsepower, which translates to a whopping 393.6 Duckpower.
Honestly, why are we still using horses as the standard here? Ducks are clearly the superior metric. So if you’re like me and prefer a more feathered approach, just remember:
3 horses = 3 horsepower = 393.6 ducks You’re welcome.
(PS: Just imagine 393.6 ducks handling 10Gb… now that’s efficiency.)
Hmm, is that waddling or flying power? Swimming?
Also, the only reason for the 3 horsepower is so the others can rest, so we’d probably need far fewer than 393.6 ducks, I think we could get away with <100, provided we can manage their sleep cycles properly.
Horsepower is a very rough “average” of work output over a given period of time. It doesn’t really account for spikes in load. For that we’ll have have to consider the torque. So the real question is, how many foot/pounds or newton/meters does OP need to handle 10 gigs of throughput?
If you connect via 10gbit PCIe extension cards it is often a question of how many PCIe channels the CPU has and if the mainboard you are using has these connected directly to the CPU or needs to pass them through the mainboard chipset which is much slower.
For a dual port card, you will want an 8 lane PCIe 3.0 slot connected to the CPU. Almost any desktop CPU will have enough lanes since you won’t be using a graphics card. You can get by with a 4 lane slot, but you won’t be able to max out both ports bidirectionally at the same time.
Your uplink capabilities are way different than your actuality. Get the service first, do some measurements, then start planning.
