Can DHCP be given based on category of device?

Posted on 2011-05-08
Last Modified: 2012-05-11
We have a Windows R2 forest level AD. Our IP schemes are a mess and I want to change it. Was thinking of the following design,


I want the 3rd octet to be a "category" octet, so for example

10.101.40.X/16 where 40 = printers
10.101.60.X/16 where 60 = wireless devices
10.101.70.X/16 where 70 = Pcs
10.101.80.X/16 where 80 = laptops

Is this doable? Is there a way (the only way I can think is based on MAC addresses) where you can distinguish the DHCP allocation within a subnet based on pre-defined categories?
Question by:Network_Padawan
    LVL 6

    Expert Comment

    This is very doable.  You'll need to separate your devices into VLANs then create a DHCP scope for each subnet.  

    Author Comment

    But if I do Vlans then they arent all in the same subnet. If you see my ip scheme they are all /16 and are same subnets.
    LVL 6

    Assisted Solution

    Ah, yes.  Sorry, I wasn't paying attention.

    It looks like you could use option classes, unfortunately I've never tried such a configuration.  This may help:

    I'd still suggest separating your devices into smaller subnets.  /16 is too big.  And with a /24 you could do what you're trying to do easily.
    LVL 26

    Accepted Solution

    Here's your answer

    Some additional reading is available here:

    I use this feature on my DHCP server to assign specific IP's to my VOIP phones and PXE-boot enabled devices.

    Author Closing Comment

    Awesome guys thanks!

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