Web-Scale Infrastructure: Making the Leap
Transitioning a web-scale model requires breaking old habits and garnering C-level buy-in.
Learning Python: Week2 (Printing, Numbers, and Lists) -Part 5
As discussed in post ( https://crazyrouters.wordpress.com/2017/02/25/learning-python-kirk-byers-python-course/ ) , i will be sharing the my learning on weekly basis as course continues. This will not only motivate me but also help others who are in phase of learning python 3. This post will focus on Exercise 4. ################# Exercise 4 ############# IV. You have the following […]
Promoting Digital Accessibility in Sri Lanka
Starting December 2015, the Internet Society Asia-Pacific (ISOC APAC) Bureau in collaboration with local stakeholders including government, industry and the civil society, has led a series of endeavours to help further digital accessibility in Pakistan.
Building on the success of our work in Pakistan, and in an effort to replicate the learnings in other parts of the Asia-Pacific, we recently held a workshop on digital accessibility in Colombo, Sri Lanka, hosted by the ISOC Sri Lanka chapter.
Mr. Naveed Haq
CCIE Renewed Again – Exam 400-101 v5.1
It came around again: CCIE renewal. Last time I renewed, I wasn’t sure if I should do it again. But I gave in, passed the CCIE R&S Written Exam, and moved one step closer to Emeritus. Turns out it wasn’t that bad, and I should not have put it off for so long.
Renewal Cycle
Cisco certifications below Expert level have a 3-year renewal cycle. You can renew your CCNA or CCNP certifications at any time by sitting an exam at the same level. Your 3-year cycle restarts from the day you pass that exam.
CCIE is a little different. A CCIE certification remains valid for two years from your lab date. You can sit any CCIE-level written exam to renew your CCIE certification. At that point your validity date gets extended for another two years – note that it is another two years based upon your lab date, not the date you passed your most recent re-cert exam.
If you don’t pass a written exam during the two-year period, your status goes to “Suspended.” You then have another 12 months to pass the exam, or you completely lose your CCIE status.
My renewal date was last Continue reading
Cisco Live US 2017 – Saturday Adventure
For the last couple years, on the Saturday before Cisco Live US kicks off, we like to go and do something in the host city. Nothing big. Nothing fancy. Just something we aren’t going to be able to do once the conference gets going. In San Diego, we went to the zoo. Last year, we went to the National Atomic Testing Museum. This year, we’re going to the National Museum of Organized Crime and Law Enforcement…aka, the Mob Museum.
It’s Vegas. This placed used to be full of mobsters doing some unsavory things. I like to think it’s a bit more legit these days, but it’ll be fun to see how the mob and the law danced around back in the day. It’s in the old historic post office and courthouse a couple block off Fremont Street and is complete with full courtroom and the wall where the Saint Valentine’s Day Massacre occurred. I should be a good time assuming we make it past the police lineup.
All are invited. If you want to join us, drop me a message on Twitter. We’ll probably meet for lunch then head over there in the early afternoon. Or head over there for lunch. Continue reading
BBR TCP
TCP is the workhorse of the Internet Protocol suite. It's the protocol that tries to take a unreliable datagram service and transform it into a reliable data stream. But that's not all. We also want it to operate efficiently over all types of network paths from bits to gigabits per second. Google has recently announced a new form of TCP control algorithm, called BBR, and in this article I'll take a closer look at BBR and what it is trying to achieve.Technology Short Take #82
Welcome to Technology Short Take #82! This issue is a bit behind schedule; I’ve been pretty heads-down on some projects. That work will come to fruition in a couple weeks, so I should be able to come up for some air soon. In the meantime, here’s a few links and articles for your reading pleasure.
Networking
- Kristian Larsson shows how to validate data using YANG. Practical examples like this have really helped me better understand YANG and its relationship to structured data you might exchange with a device or service.
- There’s lots of talk about applying test-driven development (TDD) principles in various automation contexts, but I like the fact that Ajay Chenampara provides some practical examples in his blog post on applying TDD in network automation using Ansible.
- Matt Oswalt talks about how the combination of NAPALM and StackStorm enables some interesting results, including the ability to verify configuration consistency. StackStorm isn’t something I’ve had the opportunity to learn/use at all, but it’s on my (ever-growing) list of things to check out.
- Aaron Conole provides an overview of using the
ovs-dpctlcommand to “program” the Open vSwitch (OVS) kernel module. It’s a bit geeky, but does provide some insight into Continue reading