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On Network Virtualization and SDN

Scott Lowe

Is there a difference between network virtualization and Software-Defined Networking (SDN)? So, in a similar fashion to my post on network overlays vs. network virtualization , I thought I’d weigh in with some thoughts. With this definition in hand, let’s compare network virtualization to SDN.

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Technology Short Take 95

Scott Lowe

has a nice write-up on Cisco XR stemming from a presentation at NFD 17. VPCs, or Virtual Private Clouds, are Amazon’s software-defined networking mechanism for workloads running on AWS.). Viktor van den Berg writes on deploying NSX load balancers with vRA. Virtualization. I hope it proves useful!

Vmware 60
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CLDS006: Exploring New Xeon E5 Optimizations for 10 Gb Ethernet

Scott Lowe

Next the presentation shifts focus a little bit to discuss FCoE. Johnson shows a great diagram that reviews all the various types of VM-to-VM communications that can exist in modern data centers: VM-to-VM (on the same host) via the software-based virtual switch (could be speeds of 30 to 40 Gbps in this use case).

Intel 108
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VMworld 2013 Day 2 Keynote

Scott Lowe

“This is the power of software”, according to Carl. Carl also revisits the three “imperatives” that Pat shared yesterday: Extending virtualization to all of it. Carl brings out Kit Colbert, a principal engineer at VMware (and someone who relatively well-recognized within the virtualization community).

Vmware 64
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What’s Free at Linux Academy — March 2019

Linux Academy

Eschewing any technical practices, this course takes a high-level view of the history of Linux, the open-source movement, and how this powerful software is used today. Students will explore how containers work, how they compare with virtual machines and Docker containers, and how they handle application isolation.

Linux 80
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Technology Short Take #58

Scott Lowe

Before I present this episode’s collection of links, articles, and thoughts on various data center technologies, allow me to first wish all of my readers a very merry and very festive holiday season. (See This, however, presents an issue; how do you provide outbound Internet access to these instances? Virtualization.

Vmware 60
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CIOs Need To Realize That Virtualization Isn't All That It's Cracked Up To Be (a chief information officer needs an IT strategy to create IT alignment)

The Accidental Successful CIO

Sure Virtualization Seems Neat In The Beginning, But…. To read the IT trade journals or speak with CIOs you’d think that we’ve all found the magic silver bullet that IT’s been looking for during the past few years: server virtualization. Virtualization has its own set of problems and we need to have a talk….