IT Training and Running – Not So Different?

For those that follow me on Twitter, you probably know that I’m an avid runner and post some of my experiences there. My current goal is to become a sub 20 minute 5km runner, which is turning out to be an aggressive goal. I’m probably at around 22 minutes right now. As I always do, I try to learn from different areas of life and cross apply that, to also what I do in IT. When you think about it, it’s not that different! Things I’ve learned from trying to become a better runner, that you can apply in your IT training.

Plan – The saying “failing to plan is planning to fail” is quite accurate. Many runners don’t have a plan and end up just running around the same pace every training session. That leads to mediocre results. The same is true when trying to become better at something in IT. You don’t always need a super detailed plan, but you need a plan. A certification is one of the tools to help you build that plan.

Discipline – A plan is no good if you don’t materialize it. Sometimes it’s tough, and you don’t feel like living Continue reading

Network Reliability Engineering Should Be More than Software or Automation

This blog post was initially sent to the subscribers of my SDN and Network Automation mailing list. Subscribe here.

In late 2018 Juniper started aggressively promoting Network Reliability Engineering - the networking variant of concepts of software-driven operations derived from GIFEE SRE concept (because it must make perfect sense to mimic whatever Google is doing, right?).

There’s nothing wrong with promoting network automation, or infrastructure-as-code concepts, and Matt Oswalt and his team did an awesome job with NRE Labs (huge “Thank you!” to whoever is financing them), but is that really all NRE should be?

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Money Moves: May 2020

Cisco paid $1 billion for ThousandEyes; Microsoft's buying spree continued with Metaswitch...

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DNS OARC 32a Meeting Report

For many years I have been a keenly interested participant in the meetings organised by the DNS Operations and Research Community, or DNS OARC. This time around its most recent meeting headed into the online space. Here's my impressions of the material presented at the online DNS OARC 32a meeting.

Integration Woes Throw Monkey Wrench Into Open RAN

“The elephant in the room with regards to open RAN is, of course, integration,” said Patrick...

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Legacy Open Switch 0.4.0 Image

The Open Switch 0.4.0 is the legacy Open Switch version with Cisco like CLI that I used to use in my tutorials. As it can be downloaded anymore, I share the VMDK image below. Please, use the image for learning or demonstration purpose only because this Open Switch version is discontinued. Instead, use the Open Switch […]
Continue reading...

Solving the Ingress Mystery Puzzle

Last week I posted a tweet about a Kubernetes networking puzzle. In this post, we’ll go over the details of this puzzle and uncover the true cause and motive of the misbehaving ingress.

Puzzle recap

Imagine you have a Kubernetes cluster with three namespaces, each with its own namespace-scoped ingress controller. You’ve created an ingress in each namespace that exposes a simple web application. You’ve checked one of them, made sure it works and moved on to other things. However some time later, you get reports that the web app is unavailable. You go to check it again and indeed, the page is not responding, although nothing has changed in the cluster. In fact, you realise that the problem is intermittent - one minute you can access the page, and on the next refresh it’s gone. To make things worse, you realise that similar issues affect the other two ingresses.

If you feel like you’re capable of solving it on your own, feel free to follow the steps in the walkthrough, otherwise, continue on reading. In either case, make sure you’ve setup a local test environment so that it’s easier to follow along:

  1. Clone the ingress-puzzle repo:

    git clone  Continue reading

A DNS view of Lockdown

Over the past couple of decades, we've constructed two quite distinct online environments. There is the enterprise network which is commonly encountered at physical workplaces, and there is the consumer network which has been deployed across residential domains. The result is that many observed characteristics of the network have patterns that reflected the differences between these work and home environments. But what happened when the at-work workforce was sent home to work? What can the DNS tell us about the Lockdown?

Bell Launches Canada’s Largest 5G Wireless Network

MONTRÉAL, June 11, 2020 /CNW Telbec/ – Bell today announced the launch of Canada’s...

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Lanner Electronics Partners With Trilogy Networks to Join the Rural Cloud Initiative

Lanner’s WhiteboxSolutions™ and its Ecosystem Partners Now Join Trilogy’s Distributed...

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Changes in Intel’s Technology, Systems Architecture and Client Group

Jim Keller to Depart Intel; New Leaders Named SANTA CLARA, Calif., June 11, 2020 – Today, Intel...

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Daily Roundup: Cryptominers Attack Azure

Cryptominers attacked Azure; Amazons custom Graviton2 chips landed in in AWS EC2; and SDxCentral's...

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Weekend Reads 061120

Mapping the Internet’s topology improves our understanding of its interconnectivity, and thus its robustness and resilience. One of the best ways to do this is to capture data at the router level; it provides the greatest detail of the physical infrastructure of the Internet. —Kevin Vermeulen

A number of groups are using different approaches to measure Internet outages, including active probing of most of the IPv4 Internet, and passive observation of traffic. Our group at the Information Sciences Institute of the University of Southern California (USC/ISC), developed Trinocular, a system that pings millions of /24 IPv4 blocks every 11 minutes (since October 2014). —Guillermo Baltra

Benefits like wearing pajama bottoms to work and going for a mid-day run can be mitigated by the costs to your motivation, self-confidence, and self-esteem when you no longer hear “you aced it!” from your boss on the walk back from a client meeting, or when you can’t get a high-five in the coffee room from a teammate — or even a smile from the receptionist on your way to the elevator. —Deborah Grayson Riegel

It’s a truism that in computing, the easiest way in the door is with a general-purpose computer, but when Continue reading

Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored)

Today's Heavy Networking podcast focuses on a real-world SD-WAN deployment with OneOncology. The organization deployed an SD-WAN solution from Silver Peak, our sponsor for today's podcast, to securely segment and prioritize electronic medical records over other WAN traffic, get better service quality for critical voice and video applications, and ensure the WAN was highly available. Our guests are Robert Holloway, Infrastructure Manager at OneOncology; and Damon Ennis, SVP of Products at Silver Peak.

Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored)

Today's Heavy Networking podcast focuses on a real-world SD-WAN deployment with OneOncology. The organization deployed an SD-WAN solution from Silver Peak, our sponsor for today's podcast, to securely segment and prioritize electronic medical records over other WAN traffic, get better service quality for critical voice and video applications, and ensure the WAN was highly available. Our guests are Robert Holloway, Infrastructure Manager at OneOncology; and Damon Ennis, SVP of Products at Silver Peak.

The post Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored) appeared first on Packet Pushers.

Amazon’s Custom Graviton2 Chips Arrive in AWS EC2

Plus, AMD’s second-generation EPYC processors are available on Amazon's Elastic Compute Cloud.

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DockerCon 2020: Top Rated Sessions – The Fundamentals

Of all the sessions from DockerCon LIVE 2020, the Best Practices + How To’s track sessions received the most live views and on-demand views. Not only were these sessions highly viewed, they were also highly rated. We thought this would be the case based on the fact that many developers are learning Docker for this first time as application containerization is experiencing broad adoption within IT shops. In the recently released 2020 Stack Overflow Developer Survey Docker ranked as the #1 most wanted platform. The data is clear…developers love Docker!

This post begins our series of blog articles focusing on the key developer content that we are curating from DockerCon. What better place to start than with the fundamentals. Developers are looking for the best content by the top experts to get started with Docker. These are the top sessions from the Best Practices + How To’s track. 

How to Get Started with Docker
Peter McKee – Docker

Peter’s session was the top session based on views across all of the tracks. He does an excellent job focusing on the fundamentals of containers and how to go from code to cloud. This session covers getting Docker installed, writing Continue reading

Security and Salt

One of the things I picked up during the quarantine is a new-found interest in cooking. I’ve been spending more time researching recipes and trying to understand how my previous efforts to be a four-star chef have fallen flat. Thankfully, practice does indeed make perfect. I’m slowly getting better , which is to say that my family will actually eat my cooking now instead of just deciding that pizza for the fourth night in a row is a good choice.

One of the things I learned as I went on was about salt. Sodium Chloride is a magical substance. Someone once told me that if you taste a dish and you know it needs something but you’re not quite sure what that something is, the answer is probably salt. It does a lot to tie flavors together. But it’s also a fickle substance. It has the power to make or break a dish in very small amounts. It can be the difference between perfection and disaster. As it turns out, it’s a lot like security too.

Too Much is Exactly Enough

Security and salt are alike in the first way because you need the right amount to make things work. Continue reading

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