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Networking Blog

The Official Blog Site of the Windows Core Networking Team at Microsoft
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1,450

Windows DNS Client Survey

AditiPatange on Apr 25 2024 06:00 AM
We want to hear from you about your DNS deployments to gauge interest in different DNS technologies
35.2K

Three Reasons Why You Should Not Use iPerf3 on Windows

JamesKehr on Apr 18 2024 12:10 PM
This article will explain why you should not use iPerf3 on Windows for synthetic network benchmarking and testing. Follo...
8,264

Windows 11 Plans to Expand CLAT Support

tojens on Mar 07 2024 07:00 AM
Announcing what's next for Windows 11 + IPv6 transition tech
6,027

IPv6 Transition Technology Survey

tojens on Feb 06 2024 06:00 AM
Sharing a customer signal survey to gauge interest in various approaches to IPv6 transition technology
1,726

SDN: Migrating from Rest Name to Static IP | Remove worries of DNS!

Kyle Bisnett on Feb 02 2024 09:10 AM
As an SDN administrator for HCI and Windows Server, you may have experienced issues with Dynamic DNS registration of Net...
11.6K

Introducing DNR support for Windows Insiders

AditiPatange on Oct 25 2023 10:00 AM
Instructions for enabling DNR in Windows Insiders to seamlessly deploy encrypted DNS
11K

NCSI Change Notification

JamesKehr on Jul 05 2023 03:21 PM
A recent change may cause your Windows systems from detecting an Internet connection.
4,471

Network ATC management in Windows Admin Center

Dan Cuomo on Jul 05 2023 10:13 AM
Network ATC continues to be the preferred method to deploy host networking for our Azure Stack HCI customers. For most c...
5,860

Migrate an existing cluster to Network ATC

Dan Cuomo on Jun 09 2023 09:38 AM
Network ATC has led to HUGE reductions in customer support cases which means increased uptime for your business applicat...
5,266

SDN + AKS 3-15-23 Updates and Features

Kyle Bisnett on Mar 16 2023 09:28 AM
Support for leveraging existing SDN vNETs, multiple vNETs for your Target clusters to support isolation, and a new AKS H...
9,640

Physical switch requirement changes for Azure Stack HCI

Basel_Kablawi on Mar 15 2023 10:15 AM
Read on to see the latest updates to the Azure Stack HCI physical network switch requirements!
6,918

Azure Stack HCI: What's new for Software Defined Networking (SDN) with WAC v2211

Kyle Bisnett on Jan 17 2023 12:50 PM
Today is an exciting day as we share with each of you the extensive new features and improvements for SDN in Windows Adm...
5,767

Survey: Accelerated Networking

Basel_Kablawi on Jan 06 2023 03:10 PM
We want to hear from you regarding Accelerated Networking!
7,883

Network HUD: November 2022 content update has arrived!

Dan Cuomo on Nov 15 2022 06:01 AM
In our first article we introduced Network HUD as a new feature that proactively identifies and remediates operational n...
7,881

Introducing Network HUD for Azure Stack HCI

Dan Cuomo on Nov 15 2022 06:00 AM
We’re excited to announce the release of Network HUD - A new feature that proactively identifies and remediates operatio...
6,382

General Availability for SDN integration with AKS on Azure Stack HCI

Kyle Bisnett on Oct 12 2022 10:05 AM
Our SDN and AKS engineering teams are so excited to announce General Availability to fuel our customer’s desire to enabl...
15.1K

LEDBAT Background Data Transfer for Windows

Daniel Havey on Sep 30 2022 08:50 AM
LEDBAT is the background data transfer product built into the Windows networking stack and recommended by the Windows Da...
7,370

Balance Performance in MsQuic and XDP

huanyi on Sep 16 2022 03:36 PM
Improving performance has always been a major goal for MsQuic. Recently, we have put in a lot of effort into getting ult...
11.5K

NIC Certification updates in the Windows Server Catalog

Dan Cuomo on Aug 31 2022 08:38 AM
Read on to see how we’re simplifying the structure of Windows Server NIC certifications into a "role-based" structure!
7,344

Troubleshooting SDN Windows Admin Center Certificates

Kyle Bisnett on Aug 30 2022 02:58 PM
If you are receiving "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secur...
6,891

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

Kyle Bisnett on Aug 25 2022 10:31 AM
SDN Extensions reach general availability for WAC: The rumors are true - SDN Infrastructure, Network Security Groups, Lo...
52.6K

DNS over TLS available to Windows Insiders

tojens on Jul 13 2022 10:00 AM
Instructions for enabling DNS over TLS support for Windows DNS client
14K

Open Source XDP for Windows

nibanks on May 24 2022 09:56 AM
We're bringing the latest in network acceleration technology to Windows, and it's open source!
26.9K

Aligning on mDNS: ramping down NetBIOS name resolution and LLMNR

tojens on Apr 22 2022 09:00 AM
Describing our first step toward turning NetBIOS name resolution and LLMNR off by default
72.6K

mDNS in the Enterprise

JamesKehr on Apr 04 2022 01:36 PM
mDNS is everywhere these days because it is simple, easy to build, and user friendly. Everyone in the tech industry love...
9,874

Troubleshooting HTTP/3 in http.sys

tojens on Apr 01 2022 09:00 AM
A review of some common HTTP/3 deployment challenges and how to address them
31K

Making DoH Discoverable: Introducing DDR

tojens on Oct 27 2021 06:00 AM
Discovery of Designated Resolvers (DDR) is available to Windows Insiders to dynamically discover DoH configurations
22.3K

Deploying HTTP/3 on Windows Server at Scale

nibanks on Oct 12 2021 12:40 PM
We've recently started deploying HTTP/3 to Exchange Online servers globally and have some pretty exciting data to share!

Latest Comments

BruceAMah
in Three Reasons Why You Should Not Use iPerf3 on Windows on Apr 26 2024 11:27 AM
Hi Bob-- I'd be the first to admit that I don't understand the UNIX / POSIX type runtime environments (e.g. WSL/WSL2/Cygwin) under Windows well enough to have an educated opinion on where the bottlenecks might be. (I've been learning from reading this blog post and comments however, thanks again to ...
0 Likes
rjmcmahon
in Three Reasons Why You Should Not Use iPerf3 on Windows on Apr 26 2024 10:34 AM
Hi Bruce, Thanks for your informative post. I'm skeptical that posix emulation is the bottleneck for these capacity tests. One can run iperf3 -c localhost and iperf3 -s to check. CPUs tend to run sub nanosecond and from internal cache so this should be fine and off board network i/o is going to be m...
1 Likes
BruceAMah
in Three Reasons Why You Should Not Use iPerf3 on Windows on Apr 26 2024 09:28 AM
Hi James and everyone else in this thread – Bruce Mah here, one of the developers of iperf3 at ESnet. We’ve heard from a lot of people about this blog post and been following the back and forth. Thank you for all the updates to the original post, to iperf.fr for removing the old Windows iPerf3 binar...
0 Likes
rjmcmahon
in Three Reasons Why You Should Not Use iPerf3 on Windows on Apr 23 2024 12:19 PM
Sure, for MSFT only then MSFT tools are fine. Most networks now are a mix requiring tools that run on all platforms and systems. Iperf3 is designed for capacity tests and does say use iperf2. Yet most still use Iperf3 because 3 is larger than 2 and they don't understand the technical differences. Yo...
0 Likes
JamesKehr
in Three Reasons Why You Should Not Use iPerf3 on Windows on Apr 23 2024 06:50 AM
@rjmcmahon Please keep in mind that I am in support, so the article is support slanted. From a Microsoft supportability perspective, we need internally trusted tools like ntttcp and ctsTraffic that we (Microsoft support) can use for troubleshooting purposes when addressing networking issues related ...
0 Likes