Solved

ip address conflict

Posted on 2013-06-24
4
472 Views
Last Modified: 2013-06-26
Router 192.168.1.1 doing
DHCP leasing out IP addresses  from 192.168.1.15 to 192.168.1.50

I have a Windows Server 2003 with static IP address 192.168.1.2
it's been running for a couple years.

Now I'm having an IP issue that started last week
I'm getting an IP address conflict notice from Windows server and the shared folder that the users are mapped to keeps dropping.
Question how do I find who is the problem? what device is using the server's IP?
what can I use to track down?

If I get on a computer and log into the router, the router tells me that 192.168.1.2 is being used by the server, which means the router must simply scan the network and give a list.

Any suggestions?
0
Comment
Question by:jsarinana
  • 2
4 Comments
 
LVL 20

Assisted Solution

by:CompProbSolv
CompProbSolv earned 250 total points
ID: 39273357
Depending on the size of your network and the ability to shut it down temporarily, disconnect the server network cable and run:
ping -t 192.168.1.2
to confirm that something else is out there with that address.  If it responds, start disconnecting cables to track it down.
0
 
LVL 1

Author Comment

by:jsarinana
ID: 39273418
Thanks compProbSolv
No other device responds with 192.168.1.2 if I unnplug server

IF I look at the events on the server it says the IP conflict is with 64:a:cb:33:be:9e with the name rreg-server

IF i do a ipconfig /all on the serve it comes back with 00:13:72:fd:b1:88 name rreg-server.

The server ony has one NIC, the Router doing DHCP tells me that 192.168.1.2 is being used by rreg-server.

Not sure what's going on here
0
 
LVL 39

Accepted Solution

by:
footech earned 250 total points
ID: 39274396
It looks like you're missing a character from that first MAC address.  Anyway, couple ideas:
 - you might try running arp -a | find "ma-ca-ad-re-ss-xx" (insert the conflicting MAC address with hyphens to look for) to see if any other IPs are associated with it.
 - Use a tool like the one here http://www.nirsoft.net/utils/mac_address_lookup_find.html (you can find web-based tools as well like http://www.wireshark.org/tools/oui-lookup.html or http://www.miniwebtool.com/mac-address-lookup/ ) to lookup the MAC address and see if associating it with a particular manufacturer helps you track down the device.
0
 
LVL 1

Author Closing Comment

by:jsarinana
ID: 39280006
thanks
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Hello , This is a short article on how would you go about enabling traceoptions on a Juniper router . Traceoptions are similar to Cisco debug commands but these traceoptions are implemented in Juniper networks router . The following demonstr…
Problem Description:   Couple of months ago we upgraded the ADSL line at our branch office from Home to Business line. The purpose of transforming the service to have static public IP’s. We were in need for public IP’s to publish our web resour…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

758 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

19 Experts available now in Live!

Get 1:1 Help Now