Gartner Blog Network

Andrew Lerner
Research Vice President
6+ years at Gartner
21 years IT Industry

Andrew Lerner is a Vice President in Gartner Research. He covers enterprise networking, including data center, campus and WAN with a focus on emerging technologies (SDN, SD-WAN, and Intent-based networking). Read Full Bio

Network Culture Hacks

by Andrew Lerner  |  March 26, 2018

We’ve written about the need for culture change in networking several times, including: A strong aversion to risk and desire for perceived “safe” incremental changes, leading to the accrual technical debt Enterprise networks aren’t agile which results in an ever-widening gap between business needs and network capabilities We’ve also written about how to start to […]

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Networking Needs a Chaos Monkey

by Andrew Lerner  |  March 9, 2018

It’s time, the networking industry needs a Chaos Monkey. If you’re not familiar with the concept, Netflix created the Chaos Monkey to intentionally introduce failures, such as disabling virtual machines (VMs) in their infrastructure, in order to proactively identify issues. We’ve previously written about this a few times including here, however to date there is no readily […]

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Transformation or Just an Incremental Improvement?

by Andrew Lerner  |  March 2, 2018

There are certain terms in networking that are widely over-used, we’ve all heard them: transformation, innovation, software-defined, dynamic, integrated, zero touch provisioning (if you have to physically install something, by definition, isn’t that touch?)… In many regards these terms mean nothing (but also everything at the same time). In fact, I have a half-written blog […]

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Look Beyond Network Vendors for Network Innovation

by Andrew Lerner  |  February 6, 2018

If you are responsible for an enterprise network, then you probably know there is a lot of manual CLI-based operations occurring. Not surprisingly, the top networking challenge our clients face is improving agility, and this has remained true over the past couple years. So why is this the case?  Other disciplines in IT have evolved […]

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Networking Devices and Spectre/Meltdown

by Andrew Lerner  |  January 16, 2018

Spectre and Meltdown are security vulnerabilities that impact all modern microprocessor vendors and most computing devices. Many enterprise IT teams are running around like crazy trying to get a handle on impact. So far, most of the early talk about these vulnerabilities has been focused on servers and cloud providers. However, these vulnerabilities impact networking products, […]

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Checking in on the Death of the CLI

by Andrew Lerner  |  January 4, 2018

Every year around this time, a ton of pundits make predictions. Some of them are good, some funny, while others… not so much. I’m not a huge predictions guy, but recognize there is solid value in making them. Gartner does publish official predictions across multiple technology areas (including networking) every year. However, the point today is […]

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Pragmatic Data Center Networking

by Andrew Lerner  |  December 20, 2017

Building and operating an enterprise data center network is not easy, and I’ve done it. It requires experience, attention to detail, collaboration, and a little luck. Further, data center networking investments are expensive and long-term by default, so poor design/implementation/vendor choices are very difficult to rectify. Along these lines, we’ve just published pragmatic research that […]

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Networking Reflections

by Andrew Lerner  |  December 3, 2017

I’m currently preparing for Gartner’s Infrastructure and Data Center Conference and reflecting on our networking industry. A Bill Gates quote that I think is very apropos for the networking industry is: “We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten.” […]

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Network Segmentation

by Andrew Lerner  |  November 9, 2017

One thing that comes up all the time with clients is how to segment their network(s).  There’s no simple answer to this, and we often see organizations over- and under-segmenting their environments. My colleague, security guru Greg Young has published our official positions on network segmentation (including microsegmentation) and a few takeaways include: For starters, the […]

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Networking Content at Gartner’s IT Infrastructure and Data Center Conference

by Andrew Lerner  |  October 21, 2017

We are gearing up for our yearly Data Center Conference, officially called Gartner IT Infrastructure, Operations Management & Data Center Conference, Dec 4-7 in Las Vegas. As usual, we have a solid collection of sessions, including a ton of networking content.  Here’s my take on the can’t miss stuff. Gartner Essentials: The Enterprise Network Scenario […]

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