How a Tiny Error Shut Off the Internet for Parts of the US (public domain image)

A year ago, a DDoS attack caused internet outages around the US by targeting the internet-infrastructure company Dyn, which provides Domain Name System services to look up web servers. Monday saw a nationwide series of outages as well, but with a more pedestrian cause: a misconfiguration at Level 3, an internet backbone company—and enterprise ISP—that underpins other big networks. Network analysts say that the misconfiguration was a routing issue that created a ripple effect, causing problems for companies like Comcast, Spectrum, Verizon, Cox, and RCN across the country.

Level 3, whose acquisition by CenturyLink closed recently, said in a statement to WIRED that it resolved the issue in about 90 minutes. “Our network experienced a service disruption affecting some customers with IP-based services,” the company said. “The disruption was caused by a configuration error.” Comcast users started reporting internet outages around the time of the Level 3 outages on Monday, but the company said that it was monitoring “an external network issue” and not a problem with its own infrastructure. RCN confirmed that it had some network problems on Monday because of Level 3. The company said it had restored RCN service by rerouting traffic to a different backbone.

The misconfiguration was a “route leak,” according to Roland Dobbins, a principal engineer at the DDoS and network-security firm Arbor Networks, which monitors global internet operations. ISPs use “Autonomous Systems,” also known as ASes, to keep track of what IP addresses are on which networks, and route packets of data between them. They use the Border Gateway Protocol (BGP) to establish and communicate routes. For example, packets can route between networks A and B, but network A can also route packets to network C through network B, and so on. This is how internet service providers interoperate to let you browse the whole internet, not just the IP addresses on their own networks.

ZLH Webinar Series – Peeling Back the Onion and SD WAN Overview with Masergy

The first in a series of three webinars sponsored by ZLH Enterprises. The objective of the series is to provide businesses with and idea of what the product is and be able to understand that all service providers have different variations of the SD WAN offerings. In this overview,  Masergy explains the common concept of SD WAN and Hybrid Network product offerings and then they discuss the differentiators of their product. There is also a Q&A session with some thoughtful questions and answers. For more information contact us at or call 732-845-5288.

It’s Time: Why Cloud Applications Demand Moving To An SD-WAN

When I’m talking with customers, I hear about a lot of challenges their businesses experience with their legacy WANs.
In particular, the network architects and administrators talk about the problems their WANs present as applications move from the data center to the cloud.
The challenges occur whether it is SaaS replacing traditional applications, or specific applications migrating to an IaaS service.
The benefits of cloud-based applications are often readily apparent to end users, and to most IT folks. But many networking staff see the cloud opportunity differently. They are the ones stuck trying to make the old WAN do the new tricks required to support cloud applications.
Inevitably our conversation turns to a brighter subject: What’s next for the WAN?
We talk about how a new WAN should operate, and how the enterprise can liberate itself from the legacy constraints. It is becoming clear a new kind of WAN is required: an SD-WAN that is automated and optimized to do the job of a cloud-driven enterprise—and looking forward, that is not just ‘software defined,’ but ‘self driving.’


Four Steps To A Data Management Strategy In Light Of Big Data

March 13, 2017 | Authors: Michele Goetz, Mike Gualtieri, Nasry Angel with Gene Leganza , Holger Kisker, Ph.D. , Elizabeth Cullen, Emily Miller  Jun Lee; Forrester Reseach Inc

Why read this report

Data is the lifeblood of your entire organization. It should enlighten every function of the business, including customer experience (CX), operations, marketing, sales, service, and finance. A data management (DM) strategy is critical. The goal should be clear: Provide all business functions with quick and complete access to all of the data and analytics that they need, both now and in the future. But it’s easier said than done, and that’s where strategy comes in. This report provides a four-step process for enterprise architects to formulate a next-generation DM strategy that’s both visionary and pragmatic. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy.


Should you Buy an SD-WAN service?

By Steve Garson and Dave Greenfield, Network World | Dec 12, 2016 4:56 AM PT

SD-WAN services are starting to hit the market. Are they right for your organization?

When we first started evaluating SD-WANs, the market was pretty straightforward. You had a few appliance (virtual and hardware) providers, a service provider and that’s about it. Today, more than 30 vendors deliver some kind of SD-WAN.

Mind boggling? A bit, but we can help. There are three categories of SD-WAN offerings today. You can buy SD-WAN equipment (and software) and do it yourself (DIY), subscribe to an over-the-top (OTT) SD-WAN service, or have your SD-WAN bundled with a carrier network, such as MPLS or Direct Internet Access (DIA). We’ll look at each one of them. The video below is the overview of one Service Provider’s SD WAN Offering.