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Case Study - Event ID 4199 - The system detected an address conflict for IP

Situation: the client turns on the computer this morning and receives Event ID 4119 with this message: The system detected an address conflict for IP address 192.168.1.2.

Troubleshooting:

  1. Check the DHCP client table in the Linksys router they use it as the DHCP server, but cant find another networking device using the same IP.
     
  2. Ping a 192.168.1.2, it replies without host name.
     
  3. Use ARP a 192.168.1.2, find the Mac address is 00.50.18.0a.c3.ec. From the Mac address, we find it is a D-Link wireless router added last week.


Related Topics

Calculate Hosts
Crossover Cable
IPv4 Subnet Chart
Mac Address
Patch Cable
Ports

netstat command
network troubleshooting
other DOS commands

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