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NYWIIT🇺🇸

DHCP Server 2012 - out of IP addresses
Hello,

I have a server 2012 DC running DHCP and I'm out of IP addresses to lease.  What are my options?  Was thinking to change to a class B network but that would entail a lot to re-configure all of my devices (APs, routers, printers, etc.).  I currently have a scope 192.168.120.x.  I was doing some research and came across the superscope or multicast scope.  I've never worked with these or configured them before.  I would like to keep my 120.x scope and add a second one (192.168.121.x) but not sure of the repurcussions.  Both scopes will need to work as if they are in the same LAN and can access same network resources.  I also have 2 site-to-site VPN tunnels that I'm thinking I may need to add the second scope to.  Any advice on best approach to take?  Like i mentioned, I'd like to keep existing scope intact.  Thank you in advance.

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Avatar of Adam BrownAdam Brown🇺🇸

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Avatar of Ricardo PerezRicardo Perez🇺🇸

The way I see it, you will have to reconfigure devices one way or another. It will take you less time to remove a .255 from your printers and routers subnet settings than going to the process of creating VLANS and routing them. Just remember to change the subnet on the other side of the VPN also.
Avatar of Nick RhodeNick Rhode🇺🇸

I am assuming you have all your static and DHCP scope all mixed into one subnet.  I separated my subnets like you are talking accept DHCP is dedicated to (example) 192.168.11.0 - 255 while my static addresses (Printers, Servers, Other equipment) 192.168.10.0 - 255
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Avatar of Craig BeckCraig Beck🇬🇧

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Craig,

How many IP addresses will that give me?  Also, would I need to change anything in my 192.168.120.X scope?  Or do I simply add a second range 192.168.130.X and it will automatically integrate into the existing network once I update the subnet mask?  Thanks.
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Avatar of NYWIITNYWIIT🇺🇸

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Nick,

How did you accomplish that?  What changes need to be made on my DHCP server to add a second scope that can still communicate with my existing range/scope?  Thanks.  Also, how does all this affect my NATTING device, a firewall?
Avatar of Craig BeckCraig Beck🇬🇧

Just change the subnet mask and you'll have a subnet with 510 addresses.
Avatar of Craig BeckCraig Beck🇬🇧

Seth, please explain your reasoning for selecting Adam's comment as the only answer.
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A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.