WINDOWS DHCP SCOPE QUESTION

Lance McGrew
Lance McGrew used Ask the Experts™
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We have a Scope 10.0.70.1 - 10.0.79.254   on a Windows 2008 R2 DHCP

Should we be putting addresses such as 10.0.70.255, 10.0.71.0 in reserve to avoid using any of the .0 and .255 addresses?
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Tyler BrooksNetwork and Security Consultant

Commented:
No, if your scope is .1-.254, those addresses are out of scope and thus won't be auto assigned.
Tyler BrooksNetwork and Security Consultant

Commented:
And windows won't allow anyone to statically assign those addresses.
Lance McGrewRETIRED

Author

Commented:
Our range is is x.x.70.x  to x.x.79.x so those .0 and .255 are in the mix.
Network and Security Consultant
Commented:
No, if that address range is not subnetted in anyway those addresses are no longer the network id or broadcast address, which would be respectively 10.0.70.0 and 10.0.79.255, so there is no need to reserve them out. In my experience the DHCP server is generally smart enough to avoid any sorts of weird issues like this when it hands out IP's, assuming that the scope has been configured correctly.

Sorry I didn't read the original question carefully enough.
MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
Agree with Tyler Brooks.

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