Gartner Blog Network

Andrew Lerner
Research Vice President
4 years at Gartner
19 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

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 […]

Read more »

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 […]

Read more »

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.” […]

Read more »

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 […]

Read more »

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 […]

Read more »

Open Networking

by Andrew Lerner  |  October 13, 2017

Starting with the SDN craze 4-5 years ago, there has been increasing interest from Gartner clients about “Open Networking”.  Most folks certainly prefer the notion of “open”, although it is challenging because there’s no official definition of “open networking” and openness is a spectrum of capabilities, not a binary condition. Further complicating matters, nearly all […]

Read more »

Long periods of high network availability are actually bad…

by Andrew Lerner  |  September 29, 2017

Most enterprises strive for long periods of high network availability. On the surface, this makes sense because outages result in lost revenue (even bankruptcy), damaged brand reputation, and (sometimes) people get fired. However, the desire for long periods of high availability is fundamentally flawed. This is because in a complex distributed system (i.e., enterprise networks) long […]

Read more »

vCPE helping to cement the “S” in SDWAN

by Andrew Lerner  |  September 8, 2017

I’ve always thought it ironic that despite being called SDWAN, most vendors lead with hardware appliances in accounts. That said, we continue to see a ton of innovation at the WAN Edge, and SDWAN is certainly going mainstream at this point, with deployments by thousands of customers.  However, the next wave of WAN Edge innovation […]

Read more »

The State of SDN (September 2017)

by Andrew Lerner  |  August 29, 2017

Here we are in the Fall of 2017 and Software-defined networking (SDN) remains a widely used and misused term that means everything and nothing at the same time. In fact, most of the networking products today marketed as SDN do not quality as SDN (note: this is based on our definition which aligns with the […]

Read more »

AIOps Platforms

by Andrew Lerner  |  August 9, 2017

AIOps is an emerging technology and addresses something I’m a big fan of – improving IT Operations.  So I asked fellow Gartner analyst Colin Fletcher for a guest blog on the topic… Roughly three years ago, it was looking like we were going to see many enterprise IT operations leaders put themselves in the precarious […]

Read more »