[ghc]

Here I was thinking this article would tell me how to turn my unmanaged switches into routers, but no, "anything" actually means "any fully featured general purpose computer with networking".

[HugoTea]

I suppose if you manage to get OpenWRT or something onto your switch you could use it as a router.

[wtallis]

That's theoretically possible but a bad idea for a managed switch, because they seldom have enough CPU performance or IO between the CPU and switch silicon to provide respectable routing performance. For an unmanaged switch, it's more likely that whatever CPU core is present (if any) doesn't have enough resources to run a real network stack.