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Cloud Connectivity: Methods and Myths

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IoT has an obsolescence problem

The Internet of Things (IoT) is a long way from becoming a mature technology. From wearable devices to industrial sensors and consumer conveniences, IoT vendors and users are still trying to figure out what the technology does best as it grows into a $9 trillion market by 2020 (according to some estimates).And yet, IoT is somehow already faced with a huge and growing problem of obsolescence. The problem, ironically, lies in the “things” themselves.Apple Watch: A premature antique Don’t believe me? Consider the solid gold Apple Watch Edition, launched in 2015 and sold for $10,000 to as much as $17,000 a pop. A traditional watch at that price point would be expected to last decades, perhaps even generations as it turns into a family heirloom. But with the announcement of Apple Watch OS 5 at the company’s World Wide Developers Conference this week, the original version of these fancy timepieces can no longer keep up. They simply won’t run the latest version of the operating system due out this fall, and they won’t have the features of brand-new Apple Watches that cost a tiny fraction of that amount.To read this article in full, please click here

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MAC Address Learning Basics

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CLIC Québec – L’heure du déclic pour la découverte et l’accès en ligne au contenu culturel québécois

Dans un contexte de renouvellement des politiques culturelles du Québec et du Canada à l’ère du numérique, ISOC Québec a lancé le projet « CLIC Québec » grâce à la subvention Beyond The Net octroyée par l’Internet Society en juillet 2017. Ainsi, depuis bientôt un an, ISOC Québec oeuvre à travers « CLIC Québec » d’une part à sensibiliser les décideurs politiques et les utilisateurs finaux et d’autre part à identifier et valoriser les bonnes pratiques des milieux culturels en matière de diffusion, de promotion et d’accès en ligne aux contenus et produits culturels locaux.

Profitant de la tenue du 1^er Forum sur la Gouvernance d’Internet au Québec (FGI Québec), qui coïncidait avec les célébrations des 25 ans de l’Internet Society en septembre 2017, ISOC Québec a organisé un atelier intitulé Cultures en réseaux et découvrabilité des contenus locaux au cours duquel une soixantaine de participants (professionnels de la culture, experts et consultants en politiques culturelles, spécialistes des métadonnées et du Web sémantique, chercheurs/universitaires, citoyens et utilisateurs finaux) ont identifié ensemble dix pistes d’action susceptibles d’accroître la présence et le rayonnement des contenus culturels québécois sur Internet.

Pour mobiliser davantage les acteurs des différents secteurs des industries culturelles québécoises Continue reading

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What is digital twin technology? [and why it matters]

Digital twin technology has moved beyond manufacturing and into the merging worlds of the Internet of Things, artificial intelligence and data analytics.As more complex “things” become connected with the ability to produce data, having a digital equivalent gives data scientists and other IT professionals the ability to optimize deployments for peak efficiency and create other what-if scenarios.[ Click here to download a PDF bundle of five essential articles about IoT in the enterprise. ] What is a digital twin? The basic definition of a digital twin: it’s a digital representation of a physical object or system. The technology behind digital twins has expanded to include larger items such as buildings, factories and even cities, and some have said people and processes can have digital twins, expanding the concept even further.To read this article in full, please click here

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Avoid Summarization in Leaf-and-Spine Fabrics

I got this design improvement suggestion after publishing When Is BGP No Better than OSPF blog post:

Putting all the leafs in the same ASN and filtering routes sent down to the leafs (sending just a default) are potential enhancements that make BGP a nice option.

Tony Przygienda quickly wrote a one-line rebuttal: “unless links break ;-)”

Read more ...

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Ansible Tips and Tricks

A collection of useful Ansible tips and tricks.

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Ansible Tips and Tricks

A collection of useful tips and tricks for Ansible which don't really justify a full blog post on their own. I'll keep updating this post when I come across something of value. Callbacks Convert the output of a playbook run to json. Either set the stdout_callback = json setting in...

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Switch stacking for campus design: There’s a better way

We often receive the following campus design question: “do you support switch stacking?” This is a fair question, as many of the legacy vendors have promoted stacking designs for the past decade. It’s popular enough that people ask for it, so we must support it, right?

Well, the popular option isn’t always the best one, and switch stacking designs are a very good example of that philosophy. So when people ask if we support stacking, we think to ourselves “heck, no” before politely telling them that we do not because better options exist.

“Perfection is attained, not when there is nothing more to add, but when there is nothing more to take away.”

At Cumulus Networks, we believe that simplicity is the corner-stone of network design.

Or, to say it another way, complex designs fail in complex ways (shoutout to Eric Pulvino for that quote!). Our former Chief Scientist, Dinesh Dutt, gave an excellent explanation around the importance of simple building blocks in his Tech Field Day 9 Presentation (6min 50 seconds in).

Let’s address a little history on switch stacking and then break down the major technical downfalls of a stacking design, the stacking protocol itself, Continue reading

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Cisco IOSXRv Vagrant Libvirt Box Install

Build a Cisco IOSXRv Vagrant box for use with the libvirt provider.

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Cisco IOSXRv Vagrant Libvirt Box Install

In this post I will cover how to create a Cisco IOSXRv Vagrant box for use with the vagrant-libvirt provider as well as enabling the netconf API. This post assumes a working installation of Vagrant with the vagrant-libvirt plugin already installed. You can follow this post to get the...

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Boston, London, & NY developers: We can’t wait to meet you

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At Cisco Live!

The Network Collective crew—Jordan, Eyvonne, and I—will be at Cisco Live this week. You can normally find me hanging around the certifications or social media lounge, or just walking around the floor talking to folks. I’m presenting at the CCDE techtorial on Sunday.

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Myth Busted: Who Says Software Based Networking Performance Does Not Match Physical Networking?

100 Gbps Performance with NSX Data Center

NSX Data Center has shown for some time now (see VMworld 2016 NSX Performane Session (NET 8030) that it can drive upwards of 100G of throughput per node for typical data center workloads. In that VMworld session, we ran a live demo showing the throughput being limited by the actual physical ports on the host, which were 2 x 40 Gbps, and not by NSX Data Center.

Typically, in physical networking, performance is measured in raw packets per seconds to assure variety of traffic at variable packet sizes be forwarded between multiple physical ports. While in virtualized data center this is not a case, as hypervisor hosts only have to satisfy few uplinks, typically no more than four physical links. In addition, most of the virtualized workload use TCP protocol. In that case. ESXi hypervisor fowards the TCP data segments in highly optimized way, thus not always based on number of packets transferred but the amount of data segment forwarded in software. In typical data center workloads, TCP optimizations such as TSO, LRO and RSS or Rx/Tx Filters help drive sufficient throughput at hardly any CPU cost. TSO/LRO help move large amounts of Continue reading

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SevOne Supports Move From MPLS to SD-WAN With New Monitoring Tool

The initial release of the SevOne SD-WAN Monitoring software will give insights into Cisco-Viptela SD-WAN environments, but it will soon be extended to support other SD-WAN vendors.

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Check Out Our New Network Programmability Course

Course Title: The Full Stack Engineer’s Guide to Network Programmability with Python

Course Duration: 30 hrs 33 min

 

The Full Stack Engineer’s Guide to Network Programmability with Python will provide learners with an inductive and comprehensive introduction to the Python programming language to include the various data types, control flow structures, functions, methods, classes, objects, reading and writing files, data storage using MySQL, and regular expressions. We will also cover on- and off-box Python automation and explore the guest shell in IOS-XE!

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Weekend Reads 060818

Migrating to IPv6 will make you ready for the next stage of the Internet. I was the principal network design engineer and member of the project team for deploying native IPv6 for all residential home users at Vodafone New Zealand two years ago. As an outcome of that project, IPv6 has been deployed for about 80% of residential home Internet users now. —Mansour Ganji @APNIC

After being embroiled into controversies over its data sharing practices, it turns out that Facebook had granted inappropriate access to its users’ data to more than 60 device makers, including Amazon, Apple, Microsoft, Blackberry, and Samsung. —Swati Khandelwal @The Hacker News

Over the past few years, researchers have started to choreograph vulnerability announcements to make a big press splash. Clever names — the e-mail vulnerability is called “Efail” — websites, and cute logos are now common. Key reporters are given advance information about the vulnerabilities. Sometimes advance teasers are released. Vendors are now part of this process, trying to announce their patches at the same time the vulnerabilities are announced. —Bruce Schneier

Yes, there are habits of highly effective cyber-criminals use to be successful! We can leverage the knowledge of these habits to better prepare, Continue reading

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Data Center Server Buyers Choose White Box Over Dell EMC, IHS Says

White box beat Dell EMC in terms of data center server revenue and units shipped in the first quarter of 2018.

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Linux Foundation Acknowledges Concerns About Microsoft’s Purchase of GitHub

The Linux Foundation Executive Director Jim Zemlin acknowledges that there are “still small pockets of deep mistrust of Microsoft in the open source community.”

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Vodafone Optical Trials With Ciena Hit 400 Gb/s Over a Single Wavelength

One trial used the OIF's FlexEthernet client interface standard, the other was based on Ciena's WaveLogic Ai platform.