Author
 Greg Ferro
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Profile of Greg Ferro

Network Architect & Blogger
Blog Posts: 50

Greg has nearly 30 years of experience as an IT infrastructure engineer and has been focused on data networking for about 20, including 12 years as Cisco CCIE. He has worked in Asia and Europe as a network engineer and architect for a wide range of large and small firms in many verticals. He has been writing about networking for more than 20 years and in the media since 2001.

You can email Greg or follow him on Twitter as @etherealmind. He also writes the technical blog Etherealmind.com and hosts a weekly podcast on data networking at Packet Pushers.

Articles by Greg Ferro

Why Spanning Tree Is Evil

9/8/2014
The Spanning Tree Protocol was built for an outdated network architecture, offering little to modern business, and the workarounds most engineers introduce aren't much better.

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VMware NSX Caution Signs

9/4/2013
VMware's network virtualization platform makes a strong bid to be the SDN architecture of choice, but sticky issues must still be resolved.

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New SDN Technology Challenges VMware, Cisco

4/2/2013
A new SDN competitor is challenging VMware, Cisco and others. Nuage Networks, an Alcatel-Lucent venture, has announced Virtualized Service Platform (VSP), an SDN technology that employs virtual switches and network overlays.

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Cisco's ONE Controller Debuts; Targets SDN

2/4/2013
Cisco's SDN architecture gets its keystone with the launch of the Cisco ONE Controller, a software package that supports OpenFlow and its own onePK APIs. Cisco also announced support for hybrid clouds with its Nexus 1000V product and the Nexus 6000, a new data center switch.

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Cisco Nexus 6000: First Impressions

2/1/2013
I got a sneak peek of the Cisco Nexus 6000 switch series at Cisco Live. It's packed with 40-GbE ports, multicast support and solid core Ethernet capabilities that will translate into speed, simplicity and scale. The Nexus 6000 means Cisco finally "gets" cloud networking.

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VMware's SDN Dilemma: VXLAN or Nicira?

1/31/2013
VMware has invested in two overlay network approaches: the VXLAN standard originally conceived by Cisco and STT, drafted by SDN startup Nicira. VMware acquired Nicira for more than a billion dollars. Which will VMware choose? Here’s my take.

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Cisco’s Spending Spree: An Analysis

12/6/2012
This November Cisco bought three companies in the space of about 10 days. I’ll examine whether these purchases are part of a larger strategic move, or simply the result of internal competition among Cisco’s business units.

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SDN Is Business, OpenFlow Is Technology

11/15/2012
Software-defined networking (SDN) and OpenFlow aren’t the same thing. We’ll clarify the technical differences and discuss a more important distinction: SDN emphasizes applications that drive network usability and business requirements, while OpenFlow is a technology to link an SDN controller and network devices.

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Packets Are the Past, Flows Are the Future

11/14/2012
Networking has focused for years on speeds and feeds: how many packets you can handle and how many ports per device. But hosts and applications work with flows, which will force the network to adapt. Here’s why.

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The Dodgy World Of Vendors' Customer Case Studies

4/12/2012
This week I've had a couple of vendors that are heavily promoting their customer case studies. In the last 10 years, I've been on all three sides of the customer case study game, and it's worth pointing out the harsh realities. In my view, customer case studies are a deeply flawed metric for product evaluation because the process around them is highly distorted, if not plain dodgy.

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I'm Your Customer, Not Your QA Department!

4/2/2012
Bugs are operational failures by vendors and that not only wastes company's time tracking down, but has the long term impact of stopping companies from adopting new products and features for the sake of reliability. Here are 4 misconceptions vendors tell themselves, and us, about software bugs.

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The Security Profession Is A Mess

3/21/2012
I've been considering how to build a network security plan for a small data center with an online presence. To put the proposal together I needed to develop some sort of structure in the security space so that I could research products and vendors. What I found is that implementing firewalls and IDSes is simple. Finding competent security professionals is not.

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