Hi,

Congratulations on the new site migration it looks and works awesome!!

Anyway i've just redone our office internal network as follows:

172.16.0.x - Routers, switches, printers, etc....
172.16.1.x - Servers
172.16.2.x - Hard cable computers and laptops.

What im wondering is using DHCP on win2k3 is it possible to assign the 2.x range to all the desktop/hard cabled devices and assign the 3.x range to all wireless clients in the building,
at the moment the DHCP server hands out the 2.x range to all machines.

Would it also be possible (for another scenario) to have say 2.x range to one side of the building and 3.x range to the other side? i assume VLANing will come in here somewhere.

Kind Regards,
Duncan.
 

Might this post help?

 http://thelazyadmin.com/blogs/thelazyadmin/archive/2007/02/08/DHCP-User-Classes.aspx

 

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Daniel Nerenberg
LazyAdmin
MCT,MCSE,MCTS,MCITP

Yeah that's what inspired this post , i was just wondering how do i implement that to do what i want? it's great for changing DNS servers and other scope options on a per machine or per segment/ad group basis but i can't see how it can give out differernt ip range's ?

maybe you could write a tutorial

thank's in advance.

Hi Duncan,

What you're talking about (giving IP addresses to machines with DHCP for different subnets) is typically done with VLANs and routing hardware. For example you could make all your wired clients 172.16.2.0/24, all your wireless clients 172.16.3.0/24 etc and then because these devices would be on different logical networks (or subnets), that is where the routing comes into play.

Any broadcasts that a client on for example the wired subnet (172.16.2.0/24) would send out will have VLAN information along with it which would be then passed on to your DHCP server. The DHCP server would then assign an address from the proper range based on that.

Maybe i'm thinking too much above this but i'm pretty sure this needs to be accomplished through hardware.

 - Dave

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Certs: CCNA, Network+

Duncan:

What im wondering is using DHCP on win2k3 is it possible to assign the 2.x range to all the desktop/hard cabled devices and assign the 3.x range to all wireless clients in the building,
at the moment the DHCP server hands out the 2.x range to all machines.

Would it also be possible (for another scenario) to have say 2.x range to one side of the building and 3.x range to the other side? i assume VLANing will come in here somewhere.

Part 1: I think no, because the DHCP server just assigns addresses one after another and I don't believe there is any way for it to differentiate between wired or wireless. The 2k3 DHCP will even assign addresses to clients on separate subnets if that's how it has been setup i.e. the server is on 192.168.0.1 but gives out DHCP addresses of 10.0.0.x even though afterwards the clients can't talk to the DHCP server.  The only thing, It think, would be to have two DHCP servers serving on either side of a router (or something like vlan routing on a switch) like Dave states.

Part 2: The fun with that would be getting the same subnet to talk across a router. Would be best to have them as /24 rather than /16 then they would know to use the router. 

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cheers
Andy

I have managed this in the past by assigning a static IP in the 3.x range to the Wireless AP/Router. All requests then come via the 3.x range for wireless with relevant replies. I did find that other problems occurred though, so test it first.