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Exclusions Vs. Reservations

Within DHCP Manager you have an Exclusionary Zone as well as the ability to Add Reservations. What is the difference between these two? Need both fields be populated to work? Are not both equal means to the same end?

Thank you.

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Exclusions Vs. Reservations

by Fnugry In reply to Exclusions Vs. Reservatio ...

No, those two are different. Exclusions can be used to specify addresses that *should not be assigned to DHCP clients*. A DHCP client will never receive an "excluded" address in response to address lease request.

Reservations, on other hand, canbe used to guarantee that a particular client is always assigned a specific IP address (or that a *specific IP address is always assigned to only one particular client*.)

Exclusions can be useful when a part of addresses in the scope is used by hosts with static TCP/IP configuration.

Reservations are often used to create DHCP clients with static IP-addresses. This can be helpful when, for instance, you have a large number of servers and want to be able to control TCP/IP configuration onthem centrally, avoiding the need to change the settings on each server every time you have a new gateway on the network or move your name or radius server.

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Greatly Appreciated

by LGLDSR In reply to Exclusions Vs. Reservatio ...

Thank you very much for your explanation; it is indeed appreciated! Our network is not large, having one PDC, one BDC, perhaps 200 clients. WINS/DNS/DHCP are currently on one Server.

DHCP will have it's clients released, the Services stopped and disabled before a dedicated DHCP server goes online. There exists one Subnet.

"Exclusions can be used to specify addresses that *should not be assigned to DHCP clients*". Is this more of a reminder for the Administrator, given that Static IP's that acutally **reserve** the IP should be assigned via Reservation?

Again, thank you!

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