this post was submitted on 26 Oct 2023
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You can get used enterprise stuff relatively inexpensive. By relatively, I mean that it is out of most home user budget and expertise, but within the realm of what someone who would want multi-gig could get.
In the datacenter, we stopped using 10G in 2017, and we are working our way up to 200G for servers. Virtual Machine hosts can use all of this bandwidth.
What this means is that you are going to see more 10/25/40G stuff in the used markets. A quick check of eBay and there's stuff in the $300-$500 range.
In a home situation where you only have a couple of transceivers and single default routing to your ISP, the switch is barely going past idle. Transceivers and doing stuff full table BGP routing is what makes the switch eat power. In home use, I would expect to see under 100W.