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

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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Networking and DevOps

by Andrew Lerner  |  October 30, 2018

There’s a lot of information (and misinformation) out there about networking and devops (or some variation of Net + Dev + Ops + Sec, if you prefer). Virtualizing appliances, adding APIs and automating manual networking tasks are good – but alone do not mean you have DevOpsified all the network things. In fact, it is […]

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Data Center Networking Magic Quadrant 2018

by Andrew Lerner  |  July 27, 2018

We published the Data Center Networking Magic Quadrant a few weeks back. This market covers commercial vendors that provide hardware and/or software solutions to deliver connectivity primarily within enterprise data centers. The vendors who met inclusion criteria this year were:  Arista, Big Switch, Cisco, Cumulus, Dell EMC, Extreme, HPE, Huawei, Juniper, Lenovo, Mellanox, H3C, Pluribus […]

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Just Say No to Phone Bloat

by Andrew Lerner  |  June 8, 2018

Note: This is a guest blog by Katja Ruud Enterprises often offer employees a large set of voice applications and services such as a fixed phone, a mobile phone, unified communication service, a workstream collaboration solution, a meeting solution and so on. We’ve all witnessed this when someone really wants to get ahold of you […]

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