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Category Archives for "Networking"

Cray introduces a multi-CPU supercomputer design

Supercomputer maker Cray announced what it calls its last supercomputer architecture before entering the era of exascale computing. It is code-named “Shasta,” and the Department of Energy, already a regular customer of supercomputing, said it will be the first to deploy it, in 2020.The Shasta architecture is unique in that it will be the first server (unless someone beats Cray to it) to support multiple processor types. Users will be able to deploy a mix of x86, GPU, ARM and FPGA processors in a single system.Up to now, servers either came with x86 or, in a few select cases, ARM processors, with GPUs and FPGAs as add-in cards plugged into PCI Express slots. This will be the first case of fully native onboard processors, and I hardly expect Cray to be alone in using this design.To read this article in full, please click here

Cray introduces a multi-CPU supercomputer design

Supercomputer maker Cray announced what it calls its last supercomputer architecture before entering the era of exascale computing. It is code-named “Shasta,” and the Department of Energy, already a regular customer of supercomputing, said it will be the first to deploy it, in 2020.The Shasta architecture is unique in that it will be the first server (unless someone beats Cray to it) to support multiple processor types. Users will be able to deploy a mix of x86, GPU, ARM and FPGA processors in a single system.Up to now, servers either came with x86 or, in a few select cases, ARM processors, with GPUs and FPGAs as add-in cards plugged into PCI Express slots. This will be the first case of fully native onboard processors, and I hardly expect Cray to be alone in using this design.To read this article in full, please click here

Fiber breakthrough will run networks 100x faster

A kind of twisting of light beams, within a fiber optic cable, rather than the sending of them linearly will let computer systems, and the internet overall, run faster, according to researchers who have just announced new findings. The group reckon they could speed up the internet a hundred-fold using the twisted technique.“What we’ve managed to do is accurately transmit data via light at its highest capacity in a way that will allow us to massively increase our bandwidth,” Dr. Haoran Ren, of Australia’s RMIT University, said in a press release.To read this article in full, please click here

Optical networking breakthrough will run networks 100x faster

Researchers reckon they could speed up the internet a hundredfold with a new technique that twists light beams within fiber optic cable rather than sending them in a straight path.“What we’ve managed to do is accurately transmit data via light at its highest capacity in a way that will allow us to massively increase our bandwidth,” Dr. Haoran Ren, of Australia’s RMIT University, said in a press release.[ Learn who's developing quantum computers. ] The corkscrewing configuration, in development over the last few years and now recently physically miniaturized, uses a technique called orbital angular momentum (OAM).To read this article in full, please click here

Fiber breakthrough will run networks 100x faster

A kind of twisting of light beams, within a fiber optic cable, rather than the sending of them linearly will let computer systems, and the internet overall, run faster, according to researchers who have just announced new findings. The group reckon they could speed up the internet a hundred-fold using the twisted technique.“What we’ve managed to do is accurately transmit data via light at its highest capacity in a way that will allow us to massively increase our bandwidth,” Dr. Haoran Ren, of Australia’s RMIT University, said in a press release.To read this article in full, please click here

Optical networking breakthrough will run networks 100x faster

Researchers reckon they could speed up the internet a hundredfold with a new technique that twists light beams within fiber optic cable rather than sending them in a straight path.“What we’ve managed to do is accurately transmit data via light at its highest capacity in a way that will allow us to massively increase our bandwidth,” Dr. Haoran Ren, of Australia’s RMIT University, said in a press release.[ Learn who's developing quantum computers. ] The corkscrewing configuration, in development over the last few years and now recently physically miniaturized, uses a technique called orbital angular momentum (OAM).To read this article in full, please click here

Optical networking breakthrough will run networks 100x faster

Researchers reckon they could speed up the internet a hundredfold with a new technique that twists light beams within fiber optic cable rather than sending them in a straight path.“What we’ve managed to do is accurately transmit data via light at its highest capacity in a way that will allow us to massively increase our bandwidth,” Dr. Haoran Ren, of Australia’s RMIT University, said in a press release.[ Learn who's developing quantum computers. ] The corkscrewing configuration, in development over the last few years and now recently physically miniaturized, uses a technique called orbital angular momentum (OAM).To read this article in full, please click here

BrandPost: Silver Peak Named a Leader in 2018 Gartner WAN Edge Infrastructure Magic Quadrant

For the past three years, the software-defined WAN or SD-WAN, has been one of the most talked about technology trends. By some estimations there are 60+ vendors, all marketing their products around the concept of SD-WAN, each vying to carve out a piece of this emerging multi-billion-dollar market. While all the discussion and hype around SD-WAN has helped shine the spotlight on the business value enterprises can realize by changing the way they build their wide area networks, it has also led to confusion and in some cases delays of adoption.That is why today’s release of the first ever 2018 Gartner Magic Quadrant for WAN Edge Infrastructure is such an important milestone for us. Gartner has long been one of the most influential industry analyst firms in the world, providing highly credible perspectives on technology vendors and markets. By listening to thousands of enterprise customers, reviewing each vendor’s solution in detail and analyzing their Ability to Execute and Completeness of Vision, they have published a comprehensive report to provide their view of the Leaders, Challengers, Niche Players and Visionaries in this rapidly changing market (to get a copy of the WAN Edge Magic Quadrant click here). This new Continue reading

IoT Tales of Horror (Inspired by Real-Life Events)

Happy Halloween! In some parts of the world, people are celebrating this holiday of horror by dressing up as monsters or other frights and watching scary movies. But sometimes these tales can be just a little boring. Pod people? Headless horsemen? Replicant children? Whatever.

I present the real horror stories of Halloween – and every other day of the year. These tales are inspired by real-life events and are guaranteed to give you a chill. (And not just because your smart thermostat is being controlled by a shapeshifting clown who lives in the sewer!)

I(o)T
In the fall of 2018, a group of kids work together to destroy an evil malware, which infects connected toys and preys on the children of their small town.

Inspired by the terrifying vulnerabilities found in everyday connected toys.

Night of the Living Devices
There’s panic across the Internet as connected devices suddenly begin attacking critical Internet infrastructure. The film follows a group of network operators as they frantically work to protect the Internet from these packet spewing, infected devices.

Inspired by the harrowing events of the 2016 Dyn attack.

Rosemary’s Baby Monitor
A young family moves into a house billed as the “smart Continue reading

Network Troubleshooting at Safari Books Online

I am giving my network troubleshooting class over at Safari Books Online on the 6th of December for those who are interested. I consider this a foundational session, covering the time components of an outage, a taxonomy of reactions to outages, the half-split method of searching for the root cause, and how models can help you understand the right questions to ask to narrow a problem down quickly. A lot of this course is based on formal methods of troubleshooting I learned in electronic engineering, adapted for the networking world.

This is one of three webinars I give at Safari Books on a periodic basis; I hope to be adding a fourth in the near future.

Cisco WLC for Wired to Wireless mDNS and Bonjour

Bonjour and mDNS are discovery mechanisms that generally work effortlessly within a single VLAN. Those attempting to implement these protocols in a multi subnet environment often run into some significant challenges. The typical use of CAPWAP in an enterprise wireless network adds to the segmentation between wired and wireless domains and requires special attention with devices like Applet TVs and Bonjour based printers. In this article, I will address the use case of allowing a wired Apple TV to be seen and used by a wireless client. We will also do some basic filtering to contain those advertisements to a single building.

The Starting Topology

The Scenario

Operating with a baseline configuration, users on the BigU SSID are complaining that they cannot access the Apple TV in BLDG – 3. The first task is to make that device available to those users. While the underlying infrastructure is irrelevant to this configuration method, it is MPLS and cannot be changed in our process. All APs are running in LOCAL mode. This mode creates a compulsory CAPWAP tunnel for the data plane through the controller. In the above diagram, VLAN 110 is trunked out of the controller on to the network in Continue reading

The Shifting Landscape of E-Commerce

It’s no surprise that buying behaviors have seen significant change over the past several years. Global online e-commerce sales are expected to double between 2016 and 2020. According to the U.S. Bureau of Economic Analysis (BEA), personal income increased $54.8 billion (0.3%) in July of 2018, while disposable personal income (DPI) increased $52.5 billion (0.3%) and personal consumption expenditures (PCE) increased $49.3 billion (0.4%). July’s increase in personal income was a result of salary increases, rental income, and personal dividend income. The $29.6 billion increase in PCE in July led to an increase of $10.9 billion in spending for goods and a $18.9 billion increase in spending for services.

Online shoppers are experiencing a new wave of e-commerce, one that’s highly personalized to that individual’s shopping interests and behaviors. Brands are putting more dollars behind personalization, where they capture customer data points and present those customers with relevant content and products to encourage an online sale. By capturing search queries, shopping cart, geographic location, purchase history, social behavior, and customer segments, brands are able to alter their site’s content to best serve each individual customer. More than ever, e-commerce companies Continue reading

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