What I asked was based on this video from bitmain, it seems to me it is a new functionality of their software.
There's this batch configuring option. My doubt was if it would fix the ip to the router through mac address(which I did before in a smaller farm), setting it directly in the router's configurations; or if this setup would change the gear configurations and set it automatically to static in thar specific ip addres, or would go into DHCP and work only until the next reset.
That is the same program I suggested for you , what it does is alter the network settings on the miners and not the router, those changes will be permanent until you change them, the only downside of using such a tool that sets network settings in bulk is that if you make a single mistake you won't be able to access any of your 200 gears and you will need to reset them manually one by one, so you should really try it on a small scale first until you get comfortable with using it then you can deploy it on all gears.
here is a little trick, when you power the miners, don't do it all at once, let's say you have 5 rows, turn on the first row first, wait for a few seconds, then start the second row and so on so forth, this way, you will know which IP range correspond to which row/set of miners, in that case if you one of your miners has an issue you won't have to search whiting 200 miners, this is a semi-lazy method , if you want everything to perfect you should either label all miners or simply turn the miners on 1 by 1 in order, because DHCP is first come first serve , also make sure your DHCP range is large enough to handle all the miners.