For short though, IP packets get encapsulated in Ethernet frames (another packet basically, kind of like a box in a bigger box) and the Ethernet stuff talks locally using MAC addresses. I probably shouldn’t throw out the layer 2 / 3 concepts at this point, just to avoid a bit of confusion, it’s not a lot of information, but it’s a bit hard to digest. Your switch has to support vlans, so after you look for your switch model and “vlan support” we can continue with that.
Imagine vlans as having another router port and another switch attached to it, but it’s virtual, happening on an already existing port.
So, instead of having 1 subnet per router and switch ports, you can have multiple subnets on 1 switch and 1 router port. If your switch has vlan support, you can configure a subnet (layer 3) for each vlan. A vlan is a “virtual lan” and it’s a layer 2 concept (switching).
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