Skip to content

Cannot complete the configuration of the HA agent on the host

I enabled HA on a new cluster the other day and one of the hosts came back with the following error:

Cannot complete the configuration of the HA agent on the host. Misconfiguration in the host network setup.

On ocassion, I have seen weird HA errors where simply selecting the ‘Reconfigure for HA’ on the host fixed the issue. I tried this, but the same error was seen. I next selected the host and went to Tasks & Events – Events. From there, I found the following error message:

HA agent on <host> in cluster <cluster> in <datacenter> has an error: Cannot complete the HA configuration.

Selecting the message and under Related Events selecting Show displayed:

Host <host> has the following extra networks not used by other hosts for HA communication: <IP>,.
Consider using HA advanced option ads.allowNetworkto control network usage.

Looking at the VMkernel interface, everything appeared to be configured correctly. I ensured the IP configuration was correct and that no duplicate IP issue was being experienced. So what was causing the problem?

Looking at the VMkernel interface again, I realized that for some reason the interface was selected as a Management Interface. Since a Management interface already existed and all other VMkernel interfaces in the cluster did not have this option selected, I figured I found the problem. I removed the checkbox and then selected ‘Reconfigure for VMware HA’ and the problem was solved. This is a great justification for using host profiles to ensure all hosts are configured identically.

© 2011, Steve Flanders. All rights reserved.

Published inVMware


  1. Blahphish Blahphish

    Thanks! This solved my problem.

  2. Lee Lee

    Thanks! just setting up my “white box” home lab and ran across this…

  3. Danny Danny

    Was looking for a solution and had a miss match in the vmk0,1,2,3,4 on 5 different hosts. This worked xD

Leave a Reply

Your email address will not be published. Required fields are marked *