Networking

Technical articles about deploying and managing a network based on Microsoft cloud.

General Availability for SDN integration with AKS on Azure Stack HCI

Our SDN and AKS engineering teams are so excited to announce General Availability based on customer feedback to enable SDN as the best place to host your AKS workloads on HCI.  This enables consistency with Azure Kubernetes Service for true Virtual Networking and Overlay support.  With SDN, our “overlay” network is equivalent to Azure virtual […]

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NIC Certification updates in the Windows Server Catalog

Hi Everybody – Dan Cuomo, Principal PM on the Azure Edge and Platform, Core Networking team, here to talk about some changes we’re making to NIC certification in the Windows Server Catalog. During OS deployment (and periodically after that), you likely install network drivers for your NICs. These drivers were certified to run on a

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LEDBAT Background Data Transfer for Windows

LEDBAT is the background data transfer product built into the Windows networking stack and recommended by the Windows Data Transport team for moving bulk data without interfering with foreground traffic. LEDBAT has a couple of advantages that make it our choice for the Windows networking stack. LEDBAT automatically leverages any unused bandwidth in the network

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Balance Performance in MsQuic and XDP

Improving performance has always been a major goal for MsQuic. Recently, we have put in a lot of effort into getting ultra-low latency with MsQuic. We have prototyped a fully functioning XDP data path for MsQuic to bypass Windows TCP/IP kernel stack. While working with internal partners on this technology stack, we have learned several

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Troubleshooting SDN Windows Admin Center Certificates

If you checked out our WAC 2208 Public Preview of SDN extensions, you may be presented with a notification like the below when attempting to load Virtual Networks and/or Logical Networks: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. Why is this Happening? This will only take place

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Az Stack HCI: Software Defined Networking (SDN) extensions reach General Availability for WAC

Software Defined Networking is Azure-inspired Networking in your datacenter and at the edge, learn more below: Plan for and deploy SDN infrastructure on Azure Stack HCI – Learn | Microsoft Docs  Implement Datacenter Firewall and Software Load Balancer on Azure Stack HCI – Learn | Microsoft Docs Manage Azure Stack HCI tenant networks – Learn

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Network ATC: What’s coming in Azure Stack HCI 22H2

When we first released Network ATC, we greatly simplified the deployment and on-going management of host networking in Azure Stack HCI. Whether it was the simple yet powerful deployment experience, a “that was easy” cluster expansion process, or increased reliability helping to avoid support costs, the feedback was unanimous: Network ATC was a hit!  

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DNS over TLS available to Windows Insiders

Credit and thanks to Alex Jercaianu, Matthew Cox, Miguel Reyes Badilla, and Milan Justel for implementation work DNS over TLS (DoT) is an alternative encrypted DNS protocol to DNS over HTTPS (DoH). Where DoH treats DNS traffic as one more HTTPS data stream over port 443, DoT dedicates port 853 to encrypted DNS traffic and

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Open Source XDP for Windows

XDP (eXpress Data Path) is a high performance, programmable network data path that is already a Linux Kernel project with a significant community (Google, Amazon, Intel, Mellanox, etc.) around it. “XDP for Windows” is our new open source XDP interface for Windows on GitHub. It consists of a network driver and a placeholder user mode

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Aligning on mDNS: ramping down NetBIOS name resolution and LLMNR

The modern standard for multicast name discovery is mDNS. However, Windows supports other multicast name resolutions protocols for historical reasons, including NetBIOS name resolution and LLMNR. More details about the documentation for each of these protocols can be found here. NetBIOS name resolution and LLMNR are rarely used today. This means that having them enabled

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