Solved

Rogue Subnet

Posted on 2010-11-29
5
401 Views
Last Modified: 2012-05-10
Recently switched our network from 192.168.2.x to 10.2.1.x and I'm still getting a 192.168.2.0 subnet address that is causing some major headaches here. Anyone know of an easy way to locate this subnet and shut it down?
0
Comment
Question by:telstar_
5 Comments
 
LVL 10

Accepted Solution

by:
moon_blue69 earned 500 total points
ID: 34231878
0
 
LVL 10

Expert Comment

by:qbakies
ID: 34231882
What do you mean 'still getting"?  Are machines still getting DHCP in the 192.168.2.0 range?  
0
 

Author Comment

by:telstar_
ID: 34231892
The 192.168.2.0 range is causing routing issues with another one of our offices in another part of the country.
0
 
LVL 6

Expert Comment

by:fluk3d
ID: 34231919
Go to one of your machines that is getting the IP address (192.168.2.0) and run an ipconfig/all it will tell you the DHCP server IP address.

GO to the machine either RDP/VNC/Physically and disable the dhcp service/remove the scope or what not.
0
 
LVL 2

Expert Comment

by:frederi
ID: 34232161
If your switches supports that function you can also block any DHCP other than the one you specify.
I can't remember the exact name of the function in general. On procurve switches it's called DHCP-snooping.
0

Featured Post

Network it in WD Red

There's an industry-leading WD Red drive for every compatible NAS system to help fulfill your data storage needs. With drives up to 8TB, WD Red offers a wide array of solutions for customers looking to build the biggest, best-performing NAS storage solution.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
As companies replace their old PBX phone systems with Unified IP Communications, many are finding out that legacy applications such as fax do not work well with VoIP. Fortunately, Cloud Faxing provides a cost-effective alternative that works over an…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now