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Changing DHCP to allow more than 254 ip addresses to be given out

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Last Modified: 2018-09-13
Hi All,

We have inherited a client who have a very basic network setup consisting of a Windows 2012 Standard server which is acting as their DHCP / DNS. It is on the 192.168.100.x range.

They would like to allow over 250 users to be able to connect to the network. However as you can see their range will only allow 250 users before the DHCP leases run out.

We havent had to do anything like this before as we only look after very small companies.


Would someone mind letting me know how we can go about editing their current dhcp to allow more users to connect? can i simply change the lease range to 192.168.x.x?

The gateway is currently 192.168.100.254

Their subnet is currently 255.255.255.0


Thanks in advance for any responses
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Software Developer / Linux System Administrator
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I see that makes sense, i will of course spin up a VM to give this a test beforehand, thank you for pointing me in the right direction both of you :)
Martyn SpencerSoftware Developer / Linux System Administrator
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I did indeed mean 255.255.248.0 and have updated my comment appropriately. @CompProbSolv Thanks for the catch! I would also point out that I typed 191.168.... and intended to write 192.168... I cannot amend the accepted answer to make this clear.

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