Address Space maintenance with VNet Peering

19th of October, 2018 / / No Comments

I recently had a scenario where I wanted to add an address space to a Virtual Network and encountered an issue where it was not possible to modify the address space while VNet Peering was in use. This is likely due to the fact that the routes to the peered VNet that are applied through the peering only get updated at the time the peer is created and cannot be dynamically updated.

The following error detailed this.… [Keep reading] “Address Space maintenance with VNet Peering”

Hub-Spoke communication using vNet Peering and User Defined Routes

10th of August, 2018 / / 1 Comment

Introduction

Recently, I was working on a solution for a customer where they wanted to implement a Hub-Spoke virtual network topology that enabled the HUB to communicate with its Spoke networks via vNet Peering. They also required the SPOKE networks to be able to communicate with each other but peering between them was NOT allowed.
Drawing1
As we know, vNet peering is Non-Transitive – which means, even though SPOKE 1 is peered with the HUB network and the HUB is peered with SPOKE 2, this does not enable automatic communication between SPOKE 1 and SPOKE 2 unless they are exclusively peered which in our requirement we were not allowed to do.… [Keep reading] “Hub-Spoke communication using vNet Peering and User Defined Routes”

Azure networking VNET architecture best practice update (post #MSIgnite 2016)

11th of October, 2016 / / No Comments

During Microsoft Ignite 2016 I attended a few Azure networking architecture sessions. Towards the end of the week, though, they did overlap some content which was not ideal. A key message was there though. An interesting bit of reference architecture information.
Of note and relevant to this blog post:

  • Migrate and disaster recover Azure workloads using Operations Management Suite by Mahesh Unnifrishan, Microsoft Program Manager
  • Review ExpressRoute for Office 365 configuration (routing, proxy and network security) by Paul Andrew, Senior Product Marketing Manager
  • Run highly available solutions on Microsoft Azure by Igal Figlin, Principal PM- Availability, Scalability and Performance on Azure
  • Gain insight into real-world usage of the Microsoft cloud using Azure ExpressRoute by Bala Natarajan Microsoft Program Manager
  • Achieve high-performance data centre expansion with Azure Networking by Narayan Annamalai, Principal PM Manager, Microsoft

Background

For the last few years there has been one piece of design around Azure Virtual Networks (VNETs) that caused angst.… [Keep reading] “Azure networking VNET architecture best practice update (post #MSIgnite 2016)”