An error occurred during configuration of the HA Agent on the host

A funny thing happened whilst configuring a new ESX3.5 cluster, part of my process was to enable HA on my hosts.

After checking the “Enable VMware HA” box and making a few changes to the default settings my Hosts begin to Configure HA.

All seemed to be going well until I was presented with this;

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VMotion Performance

I’ll set the scene a little….

I’m working late, I’ve just installed Update Manager and I‘m going to run my first updates. Like all new systems, I’m not always confident so I decided “Out of hours” would be the best time to try.

I hit “Remediate” on my first Host then sat back, cup of tea in hand and watch to see what happens….The Host’s VM’s were slowly migrated off 2 at a time onto other Hosts.

“It’s gonna be a long night” I thought to myself. So whilst I was going through my Hosts one at time, I also fired up Google and tried to find out if there was anyway I could speed up the VMotion process. There didn’t seem to be any article or blog posts (that I could find) about improving VMotion Performance so I created a new Servicedesk Job for myself to investigate this further.

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Microsoft NLB Error when trying to Cluster Cloned VM’s

My Job; Cluster 2 VM’s using Microsoft NLB, a simple 2 minute job right? Wrong!

Why? Because my 2nd VM was a clone of the 1st.

Once I had my newly created VM’s configured I proceeded to fire up the NLB Manager tool and began to create my new cluster. Cluster configured…first VM added to the cluster, no problems.

Then I tried to add the 2nd VM… I was confronted with this Error:

“No interfaces are available for installing a new cluster”


Great there goes my lunch break!

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