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 Source of Truth (SoT)

by Andrew Lerner  |  January 28, 2020

To align with digital business needs (i.e., more, faster but with near 100% uptime), we recommend networking professionals apply DevOps and infrastructure-as-code techniques. We’ve written about this before and it entails treating network configurations as code which will not only automate configuration, but also the validation phases, both in test and production. This is easy to say, […]

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Breaking Down DevOps for Networking

by Andrew Lerner  |  January 16, 2020

Increasing the level of network automation is a common network resolution for many organizations we speak with. Today, about 70% of network configuration activities are manually-driven (which may not sound good, but at least it is down from 85% a few years ago). In addition to longer provisioning times, manual configuration changes are ripe for human […]

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Networking Predictions 2020 Edition

by Andrew Lerner  |  January 6, 2020

We’ve been known to make a predictions through the years, and here’s a list of my favorite networking predictions that Gartner has published over the last year. We all have technical debt, and it is time to start actively managing it. Through 2023, I&O leaders who actively manage and reduce technical debt will achieve at least […]

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Say Hello to SASE (Secure Access Service Edge)

by Andrew Lerner  |  December 23, 2019

So by now, most networking folks know about SDWAN.  And of course, just when everyone is aware and comfortable with a technology, and it is (relatively) stable with over 25,000 paying customers, and we can start to absorb it…then Boom. Things change.  And we are absolutely seeing the market evolve. And the new “thing” is […]

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Public Cloud Networking: A Poll and a Prediction

by Andrew Lerner  |  December 13, 2019

On the heels of Gartner’s Infrastructure and Cloud conference, I wanted to pass along an audience poll result and prediction. First, here is the poll, in which we asked the audience about time spent networking in the public cloud: Based on this small (and not necessarily market-representative) sample, the overall average is that 5-10% of […]

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Networking Hype 2019

by Andrew Lerner  |  July 12, 2019

The 2019 Networking Hype Cycle has just published, which covers the most hyped networking technologies in the market today. The premise of the hype cycle is that most technological innovations progress through a pattern of overenthusiasm (it solves world hunger!), then disillusionment (wait, no, it CAUSES world hunger!), followed by eventual productivity, although some technologies […]

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Networking in the Public Cloud

by Andrew Lerner  |  May 14, 2019

We see quite a few network teams treating networking inside the public cloud (i.e., AWS, Azure, GCE) as “not my problem”. The scary thing is that IaaS networking capabilities are relatively easy for non-networking personnel to consume, making it easier to make and proliferate sub-optimal network decisions. This doesn’t always end well.  That said, it […]

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There’s no such thing as SDLAN (yet)

by Andrew Lerner  |  February 1, 2019

Note:  This blog was inspired by a 1980s commercial for the Washington DC Metro, There’s no such thing of “supercar“. We are increasingly seeing network vendors market things such as SD-LAN, SD-Access, SD-Campus…etc.  This sounds really great, who doesn’t want software-defined everything.  That said, there is no official/unofficial definition, and it means a wide variety […]

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2019 Network Resolution: Invest in Network Automation*

by Andrew Lerner  |  January 7, 2019

Recently, a networking leader at a mainstream enterprise asked me a very simple question: if you could only do one new thing in 2019 what would it be? For me, this is a very simple answer: invest in network automation. Why?  I’ll sum it up in two words:  Availability + Agility.  Or, if you prefer, […]

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Networking Retrospective

by Andrew Lerner  |  January 2, 2019

Around this time of year, many folks take a retrospective look at 2018 and/or make predictions for 2019 (or resolutions). One interesting thing about all these retrospectives is that frankly, networking doesn’t actually change that much in a single year. While this is not official Gartner position, my theory is that networking only changes about […]

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