Is a DCHP scope range of x.x.x.100 to x.x.x.200 large enough for 65 dynamic hosts?
I manage a small windows domain which has grown some. We now have 65 hosts using a DHCP scope range of 100 ip addresses. Expanding the DHCP scope range is easy as the 10.0.0.0/8 subnet has plenty of expansion room, so I am asking for guidance on how much to expand. What is a minimum size to avoid congestion?
What is a good ratio of count of hosts to DHCP scope ip address count to avoid congestion?
Best Answer
I have never seen the any value in trying to use the absolute minimum. When working with RFC1918, just setup a scope with lots of available space. There really isn't any major risks or problems caused simply by having more address space available in your scope then what you need.
If you want do want to minimize the range for some reason, then the best just figure out what you need through estimation and monitoring. Make a guess, that is somewhat larger then the expected number of hosts the network will see during the lease length, then simply setup tools to monitor how many available addresses you have in the scope. Increase or decrease the sized based until you have reached your criteria.