Author Archives: James Cruickshank

NSX – VXLAN Configuration

Now the hosts are prepared it’s time to build the logical network and the control plane for NSX between the cluster resources and the controllers. Sounds complicated! To accomplish this we need to  configuring VXLAN for the corresponding ESXi clusters, which will create VTEP interfaces on the hosts.

Start by navigating to the Web Client > Networking & Security > Installation > Host Preparation. Now that the cluster has been configured for NSX and all hosts show a status of Ready, the option to configure VXLAN becomes available. Click on the Configure link under the VXLAN column for the vSphere cluster.

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NSX – Segment IDs

Ok… It’s now time to create Segment IDs and this is one of the many huge advantages of SDN! In a way, you can think of these like VLANs for VXLAN … except you can have 16,777,216 of them.

Segment IDs will form the basis for how you segment traffic within the virtualized network. Although it is technically possible to use values between 1 and 16 billion, VMware has decided to start the count at 5000. This was done to avoid any confusion between a VLAN ID, which range from 1 to 4094. Quite a sensible approach!

Click on the Segment ID sub-tab and then click on the Edit button. In my lab, I’ve chosen to use the range 8000-10999 giving this environment 2999 VXLANs.

  • Segment ID Pool – The range of Segment IDs to use for creating network segments.
  • Enable multicast addressing – If you desire to use Hybrid or Multicast for your VXLAN network, check this box. I’m going to be using Unicast through this deployment.


NSX – Host Preparation

After you have installed your NSX Manager and created the NSX Controller cluster, the next step in the process is to prepare the ESXi hosts! This post is the next in my NSX series and will cover NSX – Host Preparation!

When preparing ESXi hosts, ALL hosts in the cluster must be prepped. If we don’t prepare all hosts in the cluster a VM could potentially move to a host that is not running a distributed firewall which would expose the VM to the network… not a good idea!!

I’ve chosen to prepare my cluster below, which consists of three ESXi 6.0 hosts. Navigate to the Web Client > Networking & Security > Installation > Host Preparation. Choose your NSX Manager (I have two vCenter each with a NSX Manager) then select the cluster and click the Install link.

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It’s beta time! Get your voice in and shape the…

It’s beta time! Get your voice in and shape the direction of #vSphere

It’s beta time! Get your voice in and shape the…

It’s Beta Time! The VMware vSphere team invites you to indicate your interest to join the vSphere Beta. This is a unique opportunity to get your voice in and shape the direction of vSphere. Please fill out this short survey to register your interest to join the vSphere Beta. Confirmed participants will be notified via email.

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Getting started with Photon OS and vSphere…

Getting started with Photon OS and #vSphere Integrated Containers (via

Getting started with Photon OS and vSphere…

There has been a lot of news recently about the availability of vSphere Integrated Containers (VIC) v0.1 on Gtihub. VMware have being doing a lot of work around containers, container management and the whole area of cloud native applications over the last while.

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What’s New with VMware Virtual SAN 6.2 –…

What’s New with VMware Virtual SAN 6.2 – Technical Whitepaper

What’s New with VMware Virtual SAN 6.2 –…

In case you have missed the VSAN 6.2 announce recently, there is also a PDF which has been released – What’s New with VMware Virtual SAN 6.2. The paper details what’s already being announced about VSAN 6.2. Note that I have also had the details written in my post here – VMware VSAN 6.2 Announced – Nearline dedupe, Erasure Coding, QoS ++ .

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VCAP Exam Experience

Last Friday I took the VDCA550 exam after agreeing I would study for it with a colleague (to be honest I was supposed to sit the exam in January…  but as I didn’t studying enough over the festive break I thought it best to give myself a few weeks solid study time and sit the exam in February).

The VCAP-DCA certification has been on my to-do list far too long and after my colleague passed the exam when he sat it in January the pressure was really on to get it done.

The exam is a live lab environment, my exam had 23 questions which are marked after the exam is finished. This means that you do not get an immediate pass/fail summary at the end of the exam like the VCPs or Microsoft exams, but instead you’ll be checking your email every few minutes until the score report is sent to you from VMware.

So here comes my obligatory VCAP blog post!

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Hugely honoured to be selected as one of 2016’s vExperts!

Big thank you to all the people who have helped and encouraged me, especially my gorgeous fiancé Aileen Stewart putting up with me working on my lab or writing blog posts (and occasionally coming home late after one too many vBeers!)

It really is a huge honour to be recognised and great that I get to work with a technology that excites me every day!

Thank you so much!







vCenter Orchestrator – “Not published webview error “

Came accross this recently, when working with vCO and launching the Orchestrator Web Client you get the error message below:

vco4You need to ensure the “weboperator” is published. To do this log into the vCO client as an administrator and change the focus drop down to “Administrator” then select “Web Views”, “weboperator” and click the Publish button (the green start button).