When it comes to ethernet cables from switches, you do not need cross cables. Cross cables are only if you go from pc to pc with just one cable and nothing in between that supports network functionality. This guide gives you clean wiring tables, quick “when to use” rules, modern notes on Auto-MDI/MDI-X, and deployment. Since I want to change my switches to FlexMini which are powered by PoE, I have one question. They screwed that up when they installed them. Ethernet ports on Routers and switches have pinouts such that the tx and rx wires are reversed, so a straight through cable will match up the tx on one end to the rx. Were now starting to use devices that have POE (power over Ethernet), and I was wondering: for POE to work do the RJ-45s have to be wired in a particular / different way to how they normally would? What cable are you planning to use? CAT 5e or CAT 6? I strongly recommend that you stick to a. I have an ethernet network switch (unmanaged) which supplies PoE power.
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