Adding another IP Range to DHCP

[PiqueABoo]

The DHCP server has to distinguish between a printer, a desktop, a laptop etc... How can it know other than via a manual list of MAC address reservations

 

I configure printers, WAPs, switches etc. with static IPs and keep a record of them by manually creating DNS entries in zones created for such devices. Alternatively just give them DHCP reservations.

 

PS: Given a choice of private IP address space I'd use something from 10/8. You can get (and I've seen some annoying) conflicts with factory-default addresses in 192.168/16.

[Nick_Parker]

Thanks for all your suggestions guys!

 

What I'm going to try do is create a scope with the following addresses: 192.168.0.1 - 192.168.3.254

Subnet Mask of 255.255.252.0

 

I'm going to use 192.168.0.x for Servers, WAP, Printers (via reservations)

 

and use 192.168.2.x and 192.168.3.x for PCs/Laptops

I.e. make the actual distributable pool from 192.168.2.1 -> 192.168.3.254

 

what do you think?

Edited March 1, 2008 by Nick_Parker
mistake in IP address

[FN-GM]

why not use 192.168.1.x for servers? if you use 192.168.0.x for reservations i think you will need to include that in the scope but set it as an excluded range.

[Nick_Parker]

why not use 192.168.1.x for servers? if you use 192.168.0.x for reservations i think you will need to include that in the scope but set it as an excluded range.

 

Thanks alot, will give it a try!

[Michael]

As Above, set the scope as 192.168.1.1 - 192.168.3.254, with a subnet of 225.255.252.0.

 

By creating the DHCP distributable pool from 192.168.2.1 - 192.168.3.254, this leaves the 192.168.1.x range free. This is where you should allocate servers, printers, wireless access points static IPs. No reservations are needed as they'd be outside the DHCP distributable pool.

 

Generally speaking, I'd set servers in the 192.168.1.5x range, printers in the 192.168.1.6x range and access points in the 192.168.1.7x and so on.

 

Hope this helps!

[Nick_Parker]

Thanks for all your helps guys, made the changes today and it all seems to be working, all except for some stubborn bastard server that refuses to accept it's reserved IP and so sits there saying "limited or no connectivity", remove the reservation and it quite happily picks up an IP from the DHCP within seconds.

 

Any suggestions?

[FN-GM]

Im not keen on 192.168.x.x i would go with a Class B range.. Edited March 2, 2008 by FN-Greatermanchester

[Michael]

Thanks for all your helps guys, made the changes today and it all seems to be working, all except for some stubborn bastard server that refuses to accept it's reserved IP and so sits there saying "limited or no connectivity", remove the reservation and it quite happily picks up an IP from the DHCP within seconds.

 

Any suggestions?

 

There could be two reasons. Either the IP is already in use (although generally speaking, you'll receive a message notifying you of a conflict), or secondly you're not entering all information.

 

You need to enter an unused static IP, subnet mask, gateway and the primary DNS server. Secondary DNS is optional.

[FN-GM]

your not trying to set the reservation on the DCHP server are you?

[raufdean]

Thanks for all your helps guys, made the changes today and it all seems to be working, all except for some stubborn bastard server that refuses to accept it's reserved IP and so sits there saying "limited or no connectivity", remove the reservation and it quite happily picks up an IP from the DHCP within seconds.

 

Any suggestions?

 

 

I had a very similar experience with a network cctv camera and windows 2003 sp1. Have you tried creating a reservation with the same IP address, but a test machine's mac? At least that should tell you whether the IP is in use..

[Nick_Parker]

I'm busy testing all your suggestions, I'm pretty sure there is nothing using the IP address already, busy doing network scans with Angry IP Scanner just to be 100% sure