how do you trouble shoot conflicting IP ADRESSES,in a network?

Question

how do you trouble shoot conflicting IP ADRESSES,in a network?

Answer 1

I am assuming that you actually want to know how the locate the offending systems in order that you might change the IP Address.

This can be hard, especially if the conflict is only intermittent.



Ensure that you have a device on the same subnet as the conflict.

Open a command prompt:

ping "conflicting address"

arp -a

Note the MAC Address relating to the conflicting system



You now need to find the system with that unique address.

You can use the first three octets to find out the make of NIC

http://standards.ieee.org/regauth/oui/index.shtml



If you have intelligent hubs/switches, then you will be able to locate the switch port fairly easily. This should then give you the wall port and the system.

If not, then you need to hunt for them - but at least you may be able to narrow the search.

Answer 2

If you are using DHCP, enable conflict resolution on the DHCP server. (It's disabled by default on most DHCP servers but if the DHCP database becomes corrupted you may well get conflicting addresses.) Then release-renew all DHCP clients, or just reboot them. If conflict resolution is not enabled, merely doing a release-renew may NOT resolve the issue.



If you are using static IP assignments you are in for a nightmare. While it's possible to just change the IP address on a machine that's throwing a duplicate IP error, you may well change it to the IP used by another client. This will just move the problem around. The only way to resolve this permanently is to do a full audit of all IP addresses on all hosts -- and then keep better records in the future.

Answer 3

If you do need to set those IP addresses manually, it changes a little depending on the operating system. If it's Windows XP, it's start: control panel: network connections, if it's 2000 you'll have to go into start:settings:control panel:network and dialup connections. On Windows 98/ME you'll need my computer: control panel: Network.



You'll want to go into tcp/ip (on XP/2000 you have to right click on the local area connection and go into properties to see it) and makes sure on 98/ME you choose the tcp/ip for the ethernet card. Inside here you can manually set the IP, subnet mask, DNS, and default gateway.

Answer 4

this could ensue for many motives - yet i'm going to tell you the thank you to repair it. in case you have diverse desktops at the back of a firewall, router, cable modem, or dsl modem - then you definately could desire to set all your desktops to apply dynamic IP addresses (or DHCP). this might forestall IP handle conflicts on your community. For residing house windows, open start up / administration Panel / community Connections. Double click on your community connection. click properties Scroll all the way down to "information superhighway Protocol (TCP/IP) and double click on it. make confident the two ideas are "acquire handle rapidly" click ok out of all your residing house windows. flow try this on all computers on your community. you will in no way get that alert back, because of the fact the computers will make confident they are no longer utilising an analogous IP handle. *in case you have instant, you may desire to ensure you're utilising WEP or WPA encryption so no person else on your section can use your community - somebody else available could be inflicting this situation.

Answer 5

If you are using DHCP then go to command prompt of one of the computer and type ipconfig /release followed by ipconfig /renew.



This will sort the IP conflicting.



If you are not on DHCP then chage the IP address manually.

Answer 6

if you are in a DHCP network, just reboot one of the conflicting machines.



if you are in a static network, change the IP address manually.