Broadcom BroadView Instrumentation

The diagram above, from the BroadView™ 2.0 Instrumentation Ecosystem presentation, illustrates how instrumentation built into the network Data Plane (the Broadcom Trident/Tomahawk ASICs used in most data center switches) provides visibility to Software Defined Networking (SDN) controllers so that they can optimize network performance.
The sFlow measurement standard provides open, scaleable, multi-vendor, streaming telemetry that supports SDN applications. Broadcom has been augmenting the rich set of counter and flow measurements in the base sFlow standard with additional metrics. For example, Broadcom ASIC table utilization metrics, DevOps, and SDN describes metrics that were added to track ASIC table resource consumption.

The highlighted Buffer congestion state / statistics capability in the slide refers to the BroadView Buffer Statistics Tracking (BST) instrumentation. The Memory Management Unit (MMU) is on-chip logic that manages how the on-chip packet buffers are organized.  BST is a feature that enables tracking the usage of these buffers. It includes snapshot views of peak utilization of the on-chip buffer memory across queues, ports, priority group, service pools and the entire chip.
The above chart from the Broadcom technical brief, Building an Open Source Data Center Monitoring Tool Using Broadcom BroadView™ Instrumentation Software, shows buffer utilization trended over an Continue reading

Measuring DNS Performance with Open Recursive Name Servers

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Dyn prides itself on being fast, but how do we measure ourselves? How do we compare to everyone else? With all the vagaries of DNS measurement due to caching effects, congestion, and routing irregularity, is it even possible to devise a useful, believable metric, one that anyone could validate for themselves? Dyn Research decided to tackle this challenge and this blog explains our approach. We encourage our readers to suggest improvement and try this methodology out for themselves.

Over the years Dyn has built a high-performing authoritative DNS network using strategic placement of sites and carefully engineered anycast to provide low-latency performance to recursive name servers all over the world. We use our Internet performance monitoring network of over 200 global “vantage points” to monitor DNS performance and our comprehensive view of Internet routing from over 700 BGP peering sessions to make necessary routing adjustments. This synthetic DNS monitoring and routing analysis are important tools to understand performance. But since the ultimate goal is delivering a good user experience, it’s important to measure performance from the user’s perspective. (We have written about the importance of user-centric DNS performance testing in the past.)

User perception of DNS performance depends on Continue reading

IDG Contributor Network: GPS signal jamming could cause serious, widespread problems

Unintentional interference from radios and space can cause problems for the GPS system, as can intentional jamming and spoofing of signals. But communications companies aren't prepared to protect the GPS system from these threats, according to a 2012 Homeland Security report that was recently released under the Freedom of Information Act, as reported by EE Publishing.The communications sector is "vulnerable to potential long-term GPS disruptions" of a few days or more "that could cause sector-wide service degradations," the report says.Jamming That Global Positioning Systems are vulnerable to interference and disruptions isn't news. However, the apparent lack of preparedness in civilian systems noted by DHS should be an eye-opener.To read this article in full or to leave a comment, please click here

IDG Contributor Network: GPS signal jamming could cause serious, widespread problems

Unintentional interference from radios and space can cause problems for the GPS system, as can intentional jamming and spoofing of signals. But communications companies aren't prepared to protect the GPS system from these threats, according to a 2012 Homeland Security report that was recently released under the Freedom of Information Act, as reported by EE Publishing.The communications sector is "vulnerable to potential long-term GPS disruptions" of a few days or more "that could cause sector-wide service degradations," the report says.Jamming That Global Positioning Systems are vulnerable to interference and disruptions isn't news. However, the apparent lack of preparedness in civilian systems noted by DHS should be an eye-opener.To read this article in full or to leave a comment, please click here

Congressman incorrectly claimed 72 people on terrorist watch list work for DHS

Not only is President Barack Obama wanting assistance from tech firms to fight terrorism, as he plans to “urge hi-tech and law enforcement leaders to make it harder for terrorists to use technology to escape from justice,” but in his address late Sunday he proposed several steps that Congress should take now to defeat ISIS.That is likely to include a fresh wave of stale arguments against encryption and for NSA bulk collection power which were rehashed in the wake of recent terrorist attacks. Yet presidential hopeful Senator Rand Paul told CNN, “There will always be authoritarians like [New Jersey Gov. Chris] Christie who want you to give up your liberty for a false sense of security.”To read this article in full or to leave a comment, please click here

DARPA scheme would let high-tech systems “see” as never before

Researchers at the Defense Advanced Research Projects Agency want to build extremely small light detection and ranging (LIDAR) systems -- which use light to image objects and their motions like RADAR systems use radio waves – to enable a host of new applications that would let high-tech systems “see” as they never have before.+More on Network World: The world’s most popular Instagram shots+According to DARPA, a LIDAR system beams light out and then precisely monitors the timing of reflections back to map and track objects within its detection range. Unlike a camera that captures a two-dimensional rendition of three-dimensional scenes, a LIDAR system essentially captures full-fledged three-dimensional reality. The basic technology already is out there—LIDAR allowed many robots at the DARPA Robotics Challenge to “see” and it enables autonomous vehicles to sense obstacles in their surroundings, for example—but those systems are too big, heavy and expensive for widespread use, the agency stated.To read this article in full or to leave a comment, please click here

Google patches critical media processing and rooting vulnerabilities in Android

Google has released a new batch of security fixes for its Nexus smartphones and tablets, addressing flaws that could allow attackers to compromise the Android devices via rogue emails, Web pages, and MMS messages.Firmware updates are being rolled out to supported Nexus devices as an over-the-air update and the patches will be added the Android Open Source Project (AOSP) over the next 48 hours. Builds LMY48Z and Android Marshmallow with a Dec. 1, 2015, Security Patch Level contain these fixes, Google said in its security bulletin.The updates address five vulnerabilities rated as critical, 12 rated as high and two as moderate. A significant number of flaws were again located in the OS' media processing components, which handle audio and video file playback and corresponding file metadata parsing.To read this article in full or to leave a comment, please click here

10 most important networking acquisitions of 2015

Big money2015 was a big year for mergers and acquisitions in the networking industry. Here are the ones that are most likely to have the biggest long-term impact on the industry.Check Point Software acquires Hyperwise and LacoonAlthough these were small acquisitions (both in the $80 million range), they were notable as Check Point rarely makes acquisitions. Check Point has been one of the leaders in combatting threats that go through a firewall, but more hackers are now finding ways to get around perimeter security. These acquisitions help Check Point’s customers fight the security fight on other fronts.To read this article in full or to leave a comment, please click here

10 cool ways tech companies give it up for charity

From Philadelphia to Phoenix and points in between, the Commvault Hockey Team is lacing up their skates this winter to raise awareness and money for children's organizations.The data-management vendor's Hockey Helping Kids program, now in its 16th season, runs hockey events in NHL arenas across the country. Employees, partners, customers and kids have a chance to skate with former NHL and Olympic players. Raffles and auctions are part of each day-long event, and all proceeds go to designated children’s charities.Getting kids, many of whom have disabilities, on the NHL ice with the other players is one of the most rewarding parts of the program, says Randy DeMeno, chief technologist at Commvault.To read this article in full or to leave a comment, please click here

The many faces of tech volunteerism

Techies pitch inTech companies are as creative in their social and charitable works as they are in their businesses. Cleaning up parks, teaching kids about technology, boxing donated food, running races – the projects are too numerous to list. We heard from dozens of tech vendors, big and small, about how they make time for employees to volunteer and participate in fundraising opportunities. While the events are all different, the outcome is universal: Giving back benefits not only the designated recipients but also the tech companies, which find employees are happier and work culture is stronger. Here are some of their firsthand accounts.To read this article in full or to leave a comment, please click here

The Serverless Start-up – Down with Servers!

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This is a guest post by Marcel Panse and Sander Nagtegaal from Teletext.io.

In our early Peecho days, we wrote an article explaining how to build a really scalable architecture for next to nothing, using Amazon Web Services. Auto-scaling, merciless decoupling and even automated bidding on unused server capacity were the tricks we used back then to operate on a shoestring. Now, it is time to take it one step further.

We would like to introduce Teletext.io, also known as the serverless start-up - again, entirely built around AWS, but leveraging only the Amazon API Gateway, Lambda functions, DynamoDb, S3 and Cloudfront.

The Virtues of Constraint

We like rules. At our previous start-up Peecho, product owners had to do fifty push-ups as payment for each user story that they wanted to add to an ongoing sprint. Now, at our current company myTomorrows, our developer dance-offs are legendary: during the daily stand-ups, you are only allowed to speak while dancing - leading to the most efficient meetings ever.

This way of thinking goes all the way into our product development. It may seem counter-intuitive at first, but constraints fuel creativity. For example, all Continue reading

Why aren’t you teaching?

There is an old saw about teaching and teachers: “Those who can, do. Those who can’t, teach.” This seems to be a widely believed thought in the engineering world (though perhaps less in the network engineering world than many other parts of engineering) — but is it true? In fact, to go farther, does this type of thinking actually discourage individual engineers teaching, or training, in a more formal way in the networking world? Let me give you my experience.

What I’ve discovered across the years is something slightly different: if you can’t explain it to someone else in a way they can understand it, then you don’t really know it. There are few ways to put this into practice in the real world better than intentionally taking on the task of teaching others what you know. In fact, I’ve probably learned much more in the process of preparing to teach than I ever have in “just doing.” There is something about spending the time in thinking through how to explain something in a number of different ways that encourages understanding. To put it in other terms, teaching makes you really think about how something works.

Don’t get Continue reading

Vulnerabilities found in Lenovo, Toshiba, Dell support software

The number of vulnerabilities discovered in technical support applications installed on PCs by manufacturers keeps piling up. New exploits have been published for flaws in Lenovo Solution Center, Toshiba Service Station and Dell System Detect.The most serious flaws appear to be in Lenovo Solution Center and could allow a malicious Web page to execute code on Lenovo Windows-based computers with system privileges.The flaws were discovered by a hacker who uses the online aliases slipstream and RoL and who released a proof-of-concept exploit for them last week. This prompted the CERT Coordination Center at Carnegie Mellon University to publish a security advisory.To read this article in full or to leave a comment, please click here

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