VXLAN and EVPN on Hypervisor Hosts

One of my readers sent me a series of questions regarding a new cloud deployment where the cloud implementers want to run VXLAN and EVPN on the hypervisor hosts:

I am currently working on a leaf-and-spine VXLAN+ EVPN PoC. At the same time, the systems team in my company is working on building a Cloudstack platform and are insisting on using VXLAN on the compute node even to the point of using BGP for inter-VXLAN traffic on the nodes.

Using VXLAN (or GRE) encap/decap on the hypervisor hosts is nothing new. That’s how NSX and many OpenStack implementations work.

Online parameter selection for web-based ranking problems

Online parameter selection for web-based ranking problems Agarwal et al., KDD’18

Last week we looked at production systems from Facebook, Airbnb, and Snap Inc., today it’s the turned of LinkedIn. This paper describes the system and model that LinkedIn use to determine the items to be shown in a user’s feed:

It replaces previous hand-tuning of the feature mix and ranking:

In the past, a developer spent days to accurately estimate [the feature weights] with desired behavior with every significant drift and intervention. Using the approach described in this paper, we have completely eliminated the laborious manual tuning, significantly increased developer productivity as well as obtained better Pareto optimal solutions.

Here are representative results comparing the impact on three key metrics for a setting found by the new algorithm over a period of 36 hours, vs the best setting that could be found in 7 days of hand-tuning:

Viral Actions is the most important metric for the LinkedIn feed, ‘with far reaching consequences from more subsequent sessions to more revenue.’ The algorithm is tasked with maximising this metric while not allowing others to drop by more than 1%. (Increases in the other metrics as well are Continue reading

VAGRANT FOR NETWORK ENGINEERS

Vagrant is an alien word for network engineers ,we as network engineer are more close to windows environment than Linux and always try to avoid linux . But time has changed now and with introduction of automation ,SDN ,Devops  in networks professional  life has made him to come out of windows environment and  try Linux for multiple reasons as below:

• Mostly open source projects (open stack, Docker etc. )tools are based on Linux which we as network engineers have to use.
• Network devices are now having Linux as underlying shell.
• Most of the software which are directly or indirectly related to networks are using development environment as Linux.
  

So when ever we plan to work on linux environment , we just start downloading ubantu on our windows laptop with VM box ..install both and start working.

But there is an environment known as Vagrant that will not help you do all the Linux related task but also provide an environment that helps reduce setup time and allows you to virtualize configurations for various projects.We can set up  up a virtual network environment for testing purposes, or setting up a lab,  work with python , ansible ,devops tools and much more .

You Continue reading

Worth Reading: The Fragile Engineers

Ethan Banks wrote an awesome blog post on the characteristics of fragile engineers (most of them probably being expert beginners). I can’t help but ponder how often I behave like one…

Announcing the DockerCon EU 2018 Sessions

DockerCon EU 2018 sessions focus on how Docker works for you. From the latest in Docker technology, to how-tos for your developer and IT infrastructure and operations team, to customer stories on how they are transforming their business with Docker, this year’s program was revamped based on audience feedback. The result –  we’ve doubled your favorite content! That’s right, we’ve expanded our popular Using Docker track into two customized tracks for those that are hands on with Docker technology on a daily basis – Using Docker for Developers and Using Docker for IT Infrastructure and Operations.  

DockerCon is for Teams

DockerCon is better with friends and colleagues. In Barcelona we are introducing tracks specifically dedicated to developers and IT Infrastructure and Operations professionals. Combined with hands-on learning opportunities with Official Training, Workshops and Labs, there is no shortage of ways to level up on how to work with containers every day. So grab your colleagues and register together to take advantage of our DockerCon for Teams offer: Teams of 4 or more get 10% off their registration and 10 or more get 20% off.

Using Docker for Developers

This track is designed to cover the range of topics applicable Continue reading

CloudHealth Founder Talks VMware Acquisition, Cloud’s Next Phase

CloudHealth CTO and co-founder Joe Kinsella says VMware plans to target managed service providers with its new multi-cloud management product line.

Broadcom Banks on WiFi to Storm 5G and IoT Markets

The company views WiFi as instrumental in providing the necessary in-building coverage and capacity for 5G deployments.

Innovium Downplays Chip Programmability, Stresses PAM4

Innovium considers switch chip programmability to be relevant for niche applications and as an insurance policy for future needs.

Zabbix Debuts Latest Version of Its Open Source Monitoring Software

Zabbix began as a hobby project, but evolved into a network monitoring software for system administrators to monitor IT infrastructure that has a user base of 300,000 across 75 countries.

Weekly Wrap Podcast: AT&T Contributes White Box Router Spec to OCP

SDxCentral Weekly Wrap for October 5, 2018. AT&T contributed its white box router specifications to the Open Compute Project.

Leave your VPN and cURL secure APIs with Cloudflare Access

We built Access to solve a problem here at Cloudflare: our VPN. Our team members hated the slowness and inconvenience of VPN but, that wasn’t the issue we needed to solve. The security risks posed by a VPN required a better solution.

VPNs punch holes in the network perimeter. Once inside, individuals can access everything. This can include  critically sensitive content like private keys, cryptographic salts, and log files. Cloudflare is a security company; this situation was unacceptable. We need a better method that gives every application control over precisely who is allowed to  reach it.

Access meets that need. We started by moving our browser-based applications behind Access. Team members could connect to applications faster, from anywhere, while we improved the security of the entire organization. However, we weren’t yet ready to turn off our VPN as some tasks are better done through a command line. We cannot #EndTheVPN without replacing all of its use cases. Reaching a server from the command line required us to fall back to our VPN.

Today, we’re releasing a beta command line tool to help your team, and ours. Before we started using this feature at Cloudflare, curling a server required me to Continue reading

Bloomberg China Chip-Hack Controversy Highlights Fake News, National Security Fears

By now the story and resulting controversy is as much about media credibility as it is about cyber — and national — security.

Deep Learning Just Dipped into Exascale Territory

Editors Note: We are arranging interviews with leads on both the hardware and software side of this story and will update it with more information throughout the day. …

Deep Learning Just Dipped into Exascale Territory was written by Nicole Hemsoth at .

Why Cybersecurity Training Must Become a Priority

Weekly Show 410: Broadcast Media Using IP Networks

On today’s Packet Pushers Weekly Show, we discuss how the broadcast media industry leverages IP networks, the initiatives behind the standards and protocols, and why it all matters to data networking professionals.

The post Weekly Show 410: Broadcast Media Using IP Networks appeared first on Packet Pushers.

Hadoop Needs To Be A Business, Not Just A Platform

It is safe to say that a little more than a decade ago, when the clone of Google’s MapReduce and Google File System distributed storage and computing platform was cloned at Yahoo and offered up to the world as a way to transform the nature of data analytics at scale, that we all had much higher hopes for the emergence of platforms centered around Hadoop that would change enterprise, not just webscale, computing. …

Hadoop Needs To Be A Business, Not Just A Platform was written by Timothy Prickett Morgan at .

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Gravitational Draws Kubernetes Into Its Secure Credential Sphere

The update allows for the management of glass of credentials using both Kubernetes and secure socket shell for multiple infrastructure environments.

SDxCentral’s Weekly Roundup — October 5, 2018

Dell Technologies applies to list shares on NYSE; AT&T names new preliminary 5G markets; Google launches tools for its Kubernetes Engine.

MEF18 to Host 20 Proof of Concept Demonstrations Featuring 50 Service and Technology Solution Providers

MEF is pleased to announce the titles of nearly 20 Proof of Concept (PoC) Showcase demonstrations that will be presented at the MEF18 global networking event.