With the release of vRealize Network Insight 3.6, the flow analyser inside vRNI now supports external sources for NetFlow. This means you can perform micro segmentation planning on physical servers (before you migrate them to virtual) and create deep insight into what network traffic is going through your entire network (and not just limited to what’s happening in your virtual network).

Currently, NetFlow versions 5, 7, 9 and IPFIX are supported. Getting started with NetFlow in vRNI is pretty easy, but it is slightly more complicated than regular data sources.

Getting Started

I say it’s slightly more complicated, because … Read more


VMware NSX 6.3.5 was released last week. This is a maintenance release and addresses 32 issues in previous versions. You can find the release notes here.

One thing caught my eye which is a very welcome addition to 6.3.5;

  • Host prep now has troubleshooting enhancements, including additional information for “not ready” errors

As the release notes don’t go into detail what that exactly means, I did some digging. From 6.3.5 and above, the NSX UI will now show the failure messages from EAM when the host preparation fails. For instance, you’ll see if the communication between EAM and the … Read more


One thing that I absolutely love about vRealize Network Insight (vRNI) is that the entire database is open by default and that the search bar is powered by Elastic Search. That means that you can type in pretty advanced search queries and basically query everything that vRNI collects. The query itself is written in natural language, so you don’t have to be an expert to use it. You can get really creative as well, getting output you would have a hard time seeing without using the search. To give you some examples, below you can find my cheatsheet with searches … Read more


I use CrashPlan Home for all my off-site backups of my client devices. It’s a pretty neat and usable backup client which works on Mac OS, Linux and Windows. From the client you can restore individual files and it runs as a service for continuous backups. It’s a set and forget application, which is nice.

Bye Bye CrashPlan for Home

Recently, Code42 announced they’d be shutting down CrashPlan for Home to focus on their business customers. Meaning every consumer has to transfer their backups to another solution. I had the family plan, which allows you to backup multiple computers (I … Read more


Disclaimer: this is not something for production environments (at least, I hope for your sake, GSS should be able to fix it), but more for test or homelab environments.

Say your vCenter is broken. And I mean really really broken to the point where you can’t get the services to run anymore and you either go through a VMware GSS case and hope they can fix it. I’m good at breaking things and somehow (don’t ask) got to a point where I had broken the SSO and Inventory services and couldn’t get them back up.

I’m not a fan … Read more


VMworld Europe is next week! This is always the highlight of my year, mostly for 2 reasons: 1) all kinds of awesome new virtualization technology is either announced or released, and reason 2) my favorite; the best minds of the virtualization community gather and share thoughts, learning from each other. In the last 7 years I’ve attended VMworld, there’s a few things I picked up and I wanted to share.

There’s a LOT to do

If you wanted, you could fill up about 6 months full time with all the content that’s available on VMworld. The tricky part is that … Read more


Sorry, you actually can’t configure two Netflow targets in vSphere. 😉

HOWEVER! There’s a way around this limitation. Currently, the VDS only supports one Netflow target IP address to send NetFlow to. This limitation can cause some issues when you want to employ multiple Netflow collectors, for instance an existing Network Management System (NMS) and do a vRealize Network Insight Assessment.

What is Netflow?

I’m not going to explain Netflow in depth, but just to set the stage here’s a small summary. Netflow is a protocol that allows you to collect information about what traffic flows are going through … Read more