you don't have to copy any of the above at all, it was just an example of the options available and how the fields can be populated. 99% of people will leave the address pool at the default which will be something like 192.168.1.100. Unless you know what you are doing networking wise you wont gain anything from changing it and I do it for pure novelty.
The reason why I mentioned the static ip addresses/dhcp reservation in the beginning is because you mentioned switches running off to different places and different devices and normally people who make the effort to setup networks that work properly take an interest in their management. You can't see it but if I clicked on that drop down list it would have displayed the device name and mac address of all the devices that had connected to my network, both wired and wireless, and it is easy to see what is what. General Maximus is my pc, the Sky boxes say something like BSkyB bla bla, anything which is set to default settings with say Galaxy Tab A, Galaxy S7, Sony Bravia TV etc.
You don't have to do any manual assignments at all and you can leave your router to sort everything out and everything will work fine forever. The only reason why I suggested it is going back to networking enthusiasts again, there is an accepted standard how you assign devices ip addresses on your network if you want to keep track of what is what and what things are doing, it just makes everything easier to read.
Anyways, the beautiful thing about having a proper decent quality router is that once it is setup it works, nothing ever goes wrong, you never have to reboot it and everyone lives happily ever after (unlike the shub's). Priority number one is to change the dns server, setup your wireless networks, have a look at everything else and once it is done you are sorted and you'll never have to login again. It prompts you to setup a password on initial startup so either write it down or choose something you'll remember because you'll be logging in so so rarely that you are likely to forget it. I made that mistake and ended up having to do a factory reset a year later and setup everything up from scratch again
I doubt you'll be doing it but if you going between tabs changing lots of settings make sure you click on save at the bottom of each tab before you move onto the next tab otherwise any changes will be lost when you navigate to a different page.