vSphere – ‘Cannot complete operation due to concurrent modification by another operation’
Nov17

vSphere – ‘Cannot complete operation due to concurrent modification by another operation’

KB ID 0001069 Problem I had been messing around with ports groups and VLANS, and afterwards when attempting to present a server some vNICs I got this error. Solution Virtual Center Appliance I have to completely restart the Virtual Center Appliance, before this error would clear! Solution (Windows vCenter) No matter what I did this error refused to budge, when this happens it’s usually because vCenter has got its knickers in a...

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Linux – Install VMware Tools
Jul19

Linux – Install VMware Tools

KB ID 0001330  Problem Note: This is to install the VMware Tools NOT the OPEN-VM-TOOLS. I’ve had to do this a few times now, and every time I Goolge how to do it, I get pages of instructions on how to install the open vm tools. When what I really want is to install the VMware Tools. Solution I’m using vSphere ESX, but even if you are using VMware Workstation or VMware Fusion, you can still select ‘Install/Upgrade...

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vCenter – Management Ports
Jul03

vCenter – Management Ports

KB ID 0001324  Problem A while ago my colleague was struggling to get into a vCenter server. Normal https (TCP 443) wasn’t letting him in, I knew you could manage the appliance directly, (but I couldn’t remember the port number!) He knew there was an alternate port number, but we didn’t know what it was. Solution vCenter Appliance (Direct) Management Port TCP: 5480 i.e. https://{ip-or-host-name}:5480 vCenter /...

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Unified Networking Lab – Connecting ESX VM to the Internet
Jan16

Unified Networking Lab – Connecting ESX VM to the Internet

KB ID 0001276 Problem UPDATE: This is an old article, UNL is now EVE-NG, please use the following link; EVE-NG Connecting to the Internet UNL is by far the coolest bit of kit I’ve got my hands on this year. I can run it in ESX, and connect to it from anywhere, so I don’t have to keep my labs on my laptop. But what if you want to connect your labs to a live network? Theres a great article on the unetlab website for the...

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Upgrade vSphere vCenter Appliance to Version 6.5
Dec21

Upgrade vSphere vCenter Appliance to Version 6.5

KB ID 0001265  Problem Here I’m upgrading from version 6.0 to 6.5, the process creates a new vCenter appliance, then migrates all your settings into it, finally it then shuts down the old appliance and brings up the new one. Note: This procedure is ‘non-invasive’ i.e. it does not affect your production VMs, a vSphere environment can run for about 60 days without it’s vCenter, all that you would lose is the...

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