Both the switch port and the router port would be the same. Since most devices these days are Auto-MDIX, unless you disable it on both sides it really matters not what you set the switch to since the other side would flip. If the other side does not, then simply use the one that works. Unlike duplex settings, MDI/MDIX settings are all or none.
I really REALLY R E A L L Y dislike Auto-MDIX and disable it every chance I get. At the switch console CLI, in config mode, I issue the command:
interface ethernet all mdix-mode mdix
I do not want MDIX devices connected by users or other IT coworkers to get a link without changing switch port settings. Call me a control freak if you want, but I have chased down all sorts of network problems to crappy unmanaged mini-hubs hidden behind file cabinets that someone used to add ports in an area without my knowledge.
It really irks me that these days almost every bit of cheap network junk is Auto-MDIX, making it harder for me to impede their connection to my cable plant.
