Is the Core/Distribution/Access design dead?
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Tag: azure
Test like a champ with Azure Connection Monitor
If you work in Azure, you probably know about Connection Monitor, a tool that generates synthetic traffic to test connectivity and measure response times. You configure sources (Virtual Machines) to generate traffic that can be addressed to destinations such as other Virtual Machines or any external endpoint outside of Azure. Alerts can be automatically generated … Continue reading Test like a champ with Azure Connection Monitor
Cisco ACI and Microsoft Azure
Sometimes you meet an old friend you haven’t seen for many years, and although both of you might have evolved differently during that time, most often than not you find the common ground and the reasons why you loved each other. Before I get any more sentimental, that is a bit of what I have … Continue reading Cisco ACI and Microsoft Azure
Listen to the Whispers of BGP
An old Cherokee proverb says: “Listen to the whispers and you won’t have to hear the screams”. Routing problems are hard: Hard to uncover, because sometimes they will not become apparent until something happens. For example, when your backup routes disappear, and you only notice when the primary routes are gone too. And hard in … Continue reading Listen to the Whispers of BGP
Using Route Server to firewall onprem traffic with an NVA
In a previous blog we had a setup with a Network Virtual Appliance (NVA) for Internet egress and hybrid connectivity based on Azure Virtual Network Gateways. There is another fairly typical use case with regards to traffic between on-premises an Azure: firewalling it with an NVA: In some situations customers will combine the role of … Continue reading Using Route Server to firewall onprem traffic with an NVA
Azure as Internet breakout from on-premises with Route Server
This is not a topology I would define as “best practice”, or one that I see in every Azure deployment out there, but I would certainly not describe it as exotic either. In this design, organizations want to leverage Azure as Internet breakout for their on-premises systems. Potentially because they do not have a good … Continue reading Azure as Internet breakout from on-premises with Route Server
New Azure Sample: ACI in VNet with Init and Sidecar Containers
Hey there! I have recently published a new Azure Sample: ACI in VNet with Sidecar Containers. It has generated a bit of controversy (there is a reason why I picked such a crowded image for the post title), so let me add some color to it. But let me give you the TL;DR first: the … Continue reading New Azure Sample: ACI in VNet with Init and Sidecar Containers
Virtual WAN: secure hubs in multiple regions
This article was posted in 2020. In the meantime, Azure Virtual WAN Routing Intent has been released with the functionality of securing hub-to-hub traffic. See the official documentation page here: https://learn.microsoft.com/azure/virtual-wan/how-to-routing-policies. You probably know Azure Virtual WAN, an Azure technology that abstracts hybrid networking by providing Microsoft-managed Virtual Hubs that use the Microsoft backbone to … Continue reading Virtual WAN: secure hubs in multiple regions
Azure RedHat Openshift and Hybrid Networking
Hey there! As you might have read, some time ago I wrote a pretty detailed “A day in the life of a packet” post series on how networking works in detail in Azure RedHat Openshift (ARO). Some of the feedback around those blog posts was that they are far too technical, and hard to read … Continue reading Azure RedHat Openshift and Hybrid Networking
A day in the life of a Packet in Azure Redhat Openshift (part 4)
In this part of this blog series we will have a look at how Azure Redhat Openshift works with Azure Private Link, as well as how DNS resolutions works including DNS forwarding to resolve on-premises private zones. You can find the other parts of the blog series here: Part 1: Intro and SDN Plugin Part … Continue reading A day in the life of a Packet in Azure Redhat Openshift (part 4)
Cloudtrooper 