![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://lemmy.world/pictrs/image/8286e071-7449-4413-a084-1eb5242e2cf4.png)
In the US at least, most equipment (unless you get into high-and datacenter stuff) runs on 120V. We also use 240V power, but a 240V connection is actually two 120V phases 180-degrees out of sync. The main feed coming into your home is 240V, so your breaker panel splits the circuits evenly between the two phases. Running dual-phase power to a server rack is as simple as just running two 120V circuits from the panel.
My rack only receives a single 120V circuit, but it’s backed up by a dual-conversion UPS and a generator on a transfer switch. That was enough for me. For redundancy, though, dual phases, each with its own UPS, and dual-PSU servers are hard ro beat.
I have a decently-sized homelab, and a large home network. I also have IPv6 disabled everywhere. Compared to a normal home network, my config is very complex. (Extensive firewall and routing rules, multiple gateways, multiple subnets and VLANs, inbound traffic filtering, and plenty more.) With the exception of VLANs, IPv6 would require reconfiguring EVERYTHING. What’s the advantage?