Windows Server – Change a DHCP Scopes Subnet Mask
KB ID 0001177 Problem You have probably tried to do this and found he option ‘greyed out’ because in the DHCP management console you can’t change the subnet mask of a scope. I needed to change a clients DHCP scope because I was changing their subnet from /24 to /16. I could have simply deleted and recreated the scope, but they has a lot of custom settings for their phone system, and hundreds of reservations (which...
IP (v4) Networking Crib Sheet
KB ID 0000832 Problem You would think by now I would have committed a lot of this to memory, but seeing as I always have to visit my own Subnet Calculator, I thought it was about time I had a ‘handy reference’. Feel free to copy and print it off. Solution Click for larger image. Related Articles, References, Credits, or External Links Online Subnet Calculator IPv4 and IPv6