SD-WAN Part IV: MPLS Network with IS-IS Segment Routing as SD-WAN Transport

Introduction

In order to have IP connectivity between hosts A and B over the underlay transport network, we need to build a tunnel (IPSec or GRE) between the Public IP addresses of vEdge devices (TLOC Routes). Then we also need VPN-specific subnet routing information (OMP Routes) to be able to route traffic over the tunnel. This chapter discusses the role and operation of various protocols involved in Control Plane operations when an MPLS Transport network is used as an Underlay Network for SD-WAN solution. The first section introduces the Segment Routing solution for building a Label Switch Path (LSP) between PE routers over the MPLS backbone by using the IS-IS routing protocol for both routing and label distribution. The second section explains how to build L3VPN between vEdge Public IP addresses over the LSP. Figure 4-1 shows the high-level routing model used in this chapter.

Figure 4-1: Control Plane Model.

Cloud Networking Startup Alkira Spins Up In Azure Marketplace

Cloud networking startup Alkira announced that it’s been selected for the “Microsoft for Startups” program. Microsoft offers the program to emerging companies to provide “technology and business support designed to help B2B startups quickly scale.” As part of the program, Alkira will get ecosystem support from Microsoft such as “access to technical, sales and marketing […]

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Day Two Cloud 093: Application Modernization With VMware (Sponsored)

Today’s Day Two Cloud tackles application modernization with sponsor VMware. As new application platforms such as containers and the public cloud take hold, organizations need to examine their application portfolio to figure out how applications are meeting business requirements—and how they aren’t. The point of app modernization is to determine whether a new approach and... Read more »

Day Two Cloud 093: Application Modernization With VMware (Sponsored)

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Security Power Block Series: Secure Your Data Center with NSX Firewall

We get it. The world of network security is changing, and it’s hard to keep up. Between your regular duties, pressure to adapt to changing realities, and pandemic stress on both your work and home life, it’s a challenge to find the time to build new skills.

Understanding that your time is precious, we’ve created a series of succinct, 30-minute, security-focused webinars that take a deep dive into the topics, strategies, and techniques you need to know. The four sessions in our Security Power Block Series will explore the new security landscape, how our unique architecture is ideal for protecting East-West traffic from modern security threats, and real-world use cases you can use to operationalize your data center security at scale.

You can register for one, two, three, or all sessions at once and you’ll automatically receive invitations with session links that you can add directly to your calendar. Staying informed — and learning new skills — couldn’t be easier.

Network Segmentation Made Easy

April 14, 2021
10:00 a.m. PT

Zoning or segmenting data center networks into manageable chunks Continue reading

Taking control of your Ubuntu desktop

You may have a lot more control over your Ubuntu desktop than you know. In this post, we'll look into what you should expect to see by default and how you can change that.Most Linux desktops start out charmingly uncluttered. They display a handful of icons on an attractive background. These include shortcuts for launching applications, generally along the left side or bottom of the screen, and maybe another icon or two in the otherwise open area.The uncluttered desktop is generally a good thing. You can open folders using your file manager and move around to any group of files that you need to use or update. By changing a setting on Ubuntu (and related distributions), however, you can also set up your system to open with a specified set of files in view – and you don't have to move them into your Desktop folder to do so.To read this article in full, please click here

Automating ServiceNow with Red Hat Ansible Automation Platform

IT service management (ITSM) is a collection of policies and processes for the management and support of IT services. The main focus of ITSM is increasing the value of the customers’ service chain. But without the proper automation support, providing IT services can quickly become a major time-sink.

This is where the Red Hat Ansible Automation Platform and the Red Hat Ansible Certified Content Collection for ServiceNow come into play. Ansible Automation (with some help from existing Ansible content) can automate just about any task, while the modules from this Certified Collection allow us to keep the ServiceNow information up to date.

This Collection was designed and developed by the XLAB Steampunk team in close collaboration with Red Hat Ansible, specifically keeping end-users in mind. ServiceNow modules have an intuitive user interface backed by a robust implementation, offering support for things Ansible users expect (e.g., check mode and change detection).

In this post, we will look at a few sample Ansible Playbooks that take care of essential tasks such as:

Updating incidents, problems, and change requests
Updating the ServiceNow configuration management database (CMDB)
Using the CMDB as an inventory source

Installing the Certified Content Collection for ServiceNow

We Continue reading

Netsim-tools Release 0.5 Work with Containerlab

TL&DR: If you happen to like working with containers, you could use netsim-tools release 0.5 to provision your container-based Arista EOS labs.

Why does it matter? Lab setup is blindingly fast, and it’s easier to integrate your network devices with other containers, not to mention the crazy idea of running your network automation CI pipeline on Gitlab CPU cycles. Also, you could use the same netsim-tools topology file and provisioning scripts to set up container-based or VM-based lab.

What is containerlab? A cool project that builds realistic virtual network topologies with containers. More details…

Netsim-tools Release 0.5 Work with Containerlab

TL&DR: If you happen to like working with containers, you could use netsim-tools release 0.5 to provision your container-based Arista EOS labs.

What is containerlab? A cool project that builds realistic virtual network topologies with containers. More details…

Captain Take 5 – Nuno do Carmo

Docker Captains are select members of the community that are both experts in their field and are passionate about sharing their Docker knowledge with others. “Docker Captains Take 5” is a regular blog series where we get a closer look at our Captains and ask them the same broad set of questions ranging from what their best Docker tip is to whether they prefer cats or dogs (personally, we like whales and turtles over here). Today, we’re interviewing Nuno do Carmo who has been a Docker Captain since 2019. He is a Sr System Analyst for a pharmaceutical company based in Switzerland and he is based in Montreux.

How/when did you first discover Docker?

Back in 2015, I was hanging with friends and we would meet once a week to check on technologies and we found out a training on Pluralsight, given by a certain Nigel Poulton, and we decided to “temporarily” download it, **cough**.

Both the training method from Nigel and the technology of Docker were an instant hit for us. We started to learn as hobbyists and fast forward, I guess I took it more at heart than my friends, haha.

What is your favorite Docker command?

`docker Continue reading

Making Firefox on Linux use Private Browsing by Default

While there are a couple different methods to make Firefox use private browsing by default (see this page for a couple methods), these methods essentially force private browsing and disable the ability to use “regular” (non-private) browsing. In this post, I’ll describe what I consider to be a better way of achieving this, at least on Linux.

It’s possible this method will also work on Windows, but I haven’t tested it. If anyone gets a chance to test it and let me know, I’ll update this post and credit you accordingly. Just hit me on Twitter and let me know what you’ve found in your testing. I’ve also only tested this on Fedora, but it should be the same or very similar for any distribution that uses GNOME.

GNOME uses the idea of “desktop files” (typically found in /usr/share/applications or ~/.local/share/applications) to enable the launching of applications via the Activities screen or other mechanisms. (For more information on desktop files, see here.) These desktop files specify where the executable is found, what command-line parameters to use, what icon to use, what name the application should go by, etc. Desktop files also allow application developers or users Continue reading

In Defense Of EIGRP With Zig Zsiga And Ethan Banks – Video

Zig Zsiga and Ethan Banks talk through use cases for the sometimes maligned EIGRP, a popular choice in Cisco networks for decades. The conversation covers EIGRP design basics, the stuck-in-active problem, stub routing, and RFC7868. Comparisons are made to how OSPF design differs to accomplish similar goals. This was originally published as an audio-only podcast […]

The post In Defense Of EIGRP With Zig Zsiga And Ethan Banks – Video appeared first on Packet Pushers.

Defense in Depth: The First Step to Security Certainty

Allen McNaughton Allen is the Director of Technical Sales, Public Sector at InfoBlox. He has over 20 years of experience in developing security solutions for service providers, public sector and enterprise customers. Bad actors are constantly coming up with ways to evade defensive techniques put in place by government agencies, educational institutions, healthcare providers, companies and other organizations. To keep up, network security needs what’s known as “defense in depth” — a strategy that leverages different security solutions to provide robust and comprehensive security against unauthorized intruders. Think about securing your house — locks on your doors only protect your doors. But if you have locks on your doors and windows, a high fence, security cameras, an alarm system and two highly trained guard dogs, you have what we call “defense in depth.” The same goes for networks. When it comes to building a defense-in-depth strategy for your network, the first and most important feature is visibility — knowing what is on your network. Why Visibility? Because You Can’t Protect What You Can’t See If you can’t see it, you can’t protect it — it’s obvious if you think about it. Without understanding the devices, hardware, software and traffic Continue reading

Bringing AI to the edge with NVIDIA GPUs

Cloudflare has long used machine learning for bot detection, identifying anomalies, customer support and business intelligence. And internally we have a cluster of GPUs used for model training and inference.

For even longer we’ve been running code “at the edge” in more than 200 cities worldwide. Initially, that was code that we wrote and any customization was done through our UI or API. About seven years ago we started deploying custom code, written in Lua, for our enterprise customers.

But it’s quite obvious that using a language that isn’t widely understood, and going through an account executive to get code written, isn’t a viable solution and so four years ago we announced Cloudflare Workers. Workers allows anyone, on any plan, to write code that gets deployed to our edge network. And they can do it in the language they choose.

After launching Workers we added storage through Workers KV as programs need algorithms plus data. And we’ve continued to add to the Workers platform with Workers Unbound, Durable Objects, Jurisdictional Restrictions and more.

But many of today’s applications need access to the latest machine learning and deep learning methods. Those applications need three things: to scale easily, Continue reading

What’s In A Title? Network Engineer Vs. Professional Or Licensed Engineer

In the US, do not call yourself a "Professional Engineer" or "Licensed Engineer" as your title. Those are specially reserved titles for those who actually ARE licensed. However, calling yourself a "Network Engineer" is okay. If you want to know more details, read on.

The post What’s In A Title? Network Engineer Vs. Professional Or Licensed Engineer appeared first on Packet Pushers.

Don’t Poke Holes in Our Digital Security Shield

In only a few days the European Union will close the doors on our chance to provide feedback on an initiative which could grant law enforcement agencies backdoor access to encrypted messaging services. Doing this would poke holes in our most important digital security shield. It misleadingly claims it to protect kids’ safety online. As […]

The post Don’t Poke Holes in Our Digital Security Shield appeared first on Internet Society.

Finally! Local Traffic Remained Local

During a recent broadcast of an Italian Series A Championship football match, something extraordinary was happening behind the scenes. Local Internet traffic remained local. Cristiano Zanforlin, Chief Commercial Officer of Milan Internet Exchange (MIX), Flavio Luciani, Chief Technology Officer of Consorzio Namex, and Luca Cicchelli, Interconnection Manager of Consorzio TOP-IX, explain how Italian IXPs helped […]

The post Finally! Local Traffic Remained Local appeared first on Internet Society.

Location-based personalization at the edge with Cloudflare Workers

We’re excited to announce an update to Cloudflare Workers, our serverless code platform built on our global network. Geolocation data is now accessible and free for all developers on our Workers platform, including users on the free plan!

You can now serve personalized experiences for users based on their location using Workers. Personalization is critical to building intuitive apps for users and it unlocks new possibilities for what you can build on our platform. Whether you’re building a social networking app or an automatic shipping cost estimator for an e-commerce site, a one-size-fits-all experience doesn’t cut it. Location-based personalization helps you show what’s most relevant to your users, be it tickets for movies in their area or content in their local language.

With geolocation data available on the server side, there’s no configuration needed for users to set their location.

Each request to a Worker includes the user’s (example data shown):

Country: “US”
City: “Austin”
Continent: “NA”
Latitude: "30.27130"
Longitude: “-97.74260”
Postal code: "78701"
Metro code(dma): “635”
Region: “Texas”
Timezone: “America/Chicago”

Geolocation data on Workers makes it even easier to build server rendered apps and customized services.

Refer to the documentation to learn more.

In case you need Continue reading

Expanding the Cloudflare Workers Observability Ecosystem

One of the themes of Developer Week is “it takes a village”, and observability is one area where that is especially true. Cloudflare Workers lets you quickly write code that is infinitely scalable — no availability regions, no scaling policies. Your code runs in every one of our data centers by default: region Earth, as we like to say. While fast time to market and effortless scale are amazing benefits, seasoned developers know that as soon as your code is in the wild… stuff happens, and you need the tools in place to investigate, diagnose, fix and monitor those issues.

Today we’re delighted to add to our existing analytics partners. We’re announcing new partnerships with six observability-focused companies that are deeply integrated into the Cloudflare Workers ecosystem. We’re confident these partnerships will provide immediate value in building the operational muscle to maintain and make your next generation of applications fast, secure and bullet-proof in production.

console.log(`Got request. Extracted name=${name}. Saving…`);

Cloudflare wrangler gives you the ability to generate, configure, build, preview and publish your projects, from the comfort of your dev environment. Writing code in your favorite IDE with a fully-fledged CLI tool that also allows you to simulate Continue reading

10 of the best ways to get help on Linux

Just because Linux appeals to the nerdiest of nerds doesn't mean that it can't be extremely helpful for those who don't want to spend a lot of time delving into the technical details of how to use various commands. In fact, Linux provides a series of tools that can help anyone master the command line or just get the task at hand done more quickly and efficiently. This post covers 10 of the best options.man pages You can always go to the man pages to answer usage and syntax questions you might have on a Linux command. Just type "man" followed by the name of the command (e.g., man ps), and you'll get a lot of descriptive information. On the other hand, if you really just want to see some examples of how to use a particular command, the content of a man page might be a lot more than you want to comb through. In the remainder of this post, I'll explain some other options for finding the command that you need and learning how to use it.To read this article in full, please click here

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