Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 123
  • Last Modified:

Expand DHCP scope

I have a 192.168.0x network with 255.255.255.0 subnet mask.

There are currently 200 devices on the network... how allow for 200 more?

The 2008 server is the DHCP server.
0
classnet
Asked:
classnet
  • 5
  • 4
1 Solution
 
bbaoIT ConsultantCommented:
are there any other servers on the same subnet? are the servers using static IPs? are all the client computers using dynamic IPs by DHCP?
0
 
classnetAuthor Commented:
Just one server.  The server address is static.  Most clients are using DHCP.  There are a couple of copiers and wireless AP that have static.
0
 
classnetAuthor Commented:
Do I just need to change the SN mask to 255.255.254.0?
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
bbaoIT ConsultantCommented:
for such a scenario, YES, simply change server NIC's subnet mask to 255.255.254.0, then the IP settings of DHCP service via DHCP manager.

be aware two things:

1. depending the existing Client Lease Time set on the DHCP server, the clients may take a while to renew their IP setting with correct mask, commonly from 1 to 7 days. however, rebooting the client computer or running IPCONFIG /RENEW can update with new settings instantly.

2. you need to manually change the local router's subnet mask, if the default gateway is not the server itself.
0
 
classnetAuthor Commented:
Actually, changing the subnet mask would only be part of the process.  I'd need to create another scope too I guess (configuring Server 2008 DHCP)?
0
 
bbaoIT ConsultantCommented:
why another scope? you got another subnet to create? on the SAME physical network (or VLAN) or multiple networks (or VLANs) separated by a router?
0
 
classnetAuthor Commented:
My current scope is from 192.168.0.50 to 192.168.0.250 (200 addresses).  I'd like to be able to accommodate 400 addresses.
0
 
bbaoIT ConsultantCommented:
as you can't edit subnet mask once the scope has been created and activated, you need to delete the existing scope and creat a new one with new mask and other previous settings. that's it.
0
 
classnetAuthor Commented:
Thank you
0

Featured Post

Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

  • 5
  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now