Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

We get this error on ESXi 5.0:

A duplicate IP address was detected for 192.168.x.x on the interface vmk1.
The current owner is xx:xx:xx:xx:xx:xx.

Talking to VMWare support and googling it produced nothing! Help please!

Thanks!

share|improve this question
add comment

closed as not a real question by HopelessN00b, Michael Hampton, EEAA, Tim Brigham, Chris S Aug 10 '12 at 3:53

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

2 Answers

Well, it means that some other device (as identified by the MAC address provided) on your network has the same IP address as one of your VMKernel interfaces.

Locating the offending device will be left as an exercise for the reader.

share|improve this answer
add comment

I'd assume you have an IP address conflict with a system on your network whose hardware address (MAC address) is xx:xx:xx:xx:xx:xx.

  • You could change the IP address of your ESXi server.
  • You could isolate the ESXi server from the rest of the network.
  • You could look for the device whose MAC address is xx:xx:xx:xx:xx:xx and change its IP or turn it off.

VMWare would not be able to help you in this instance since they don't know your environment. The error message is quite clear.

VMWare does have a knowledge base article for your specific error message.

The solution is:

Solution
Correctly set the IP address with the esxcfg-vmknic command or set it to DHCP mode.
share|improve this answer
add comment

Not the answer you're looking for? Browse other questions tagged or ask your own question.