The Post-Hardware Footprint
Pyramids and cathedrals are so old school.
Why Machine Learning Is Hard to Apply to Networking
Wanted: A 'theory of everything' for networks.
Yang Explorer in a Docker container
I would like to see a day come true where all major vendors’ boxes (even small & cheap ones) will be 100% covered by YANG models. Can’t say I believe that it is possible for IETF to standard all the things in vendors domain, but we will manage as long as vendors will stick to standardMy Personal Look Back on 2016
I haven’t ever written a “year in review” type of post before. Sure, I do a post to summarize how the blog has done over the year but I’ve never done a personal look back. Last night–New Years Eve–I was thinking about everything that I was involved in during 2016 and I realized “I should write this down! I was involved in or a participant of some amazing things last year!”
So here we go. In an effort to show a more personal side and not just my geeky side, here is my personal 2016 year in review.
Got Married
In February, my then-girlfriend and I got married! I know everyone says their wedding was the best, but ours totally was! Trust me! 
In all honesty, it was one of the funnest days of my life. Full credit to my wife for planning what was essentially an awesome party with our families and closest friends. Oh, and the venue and staff were absolutely amazing as well which sealed the deal as the greatest wedding ever 
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Launched a Second Blog
For a while now I’ve been in the habit of snapping photos of wireless access points Continue reading
Bringing 2017 To Everyone
It’s time once again for my traditional New Year’s Day navel gazing. As per tradition with my blog, I’m not going to make prognostications about networking or IT in general. Either I’m going to wind up totally wrong or be totally right and no one will care. I rather enjoy the ride as we go along, so trying to guess what happens is kind of pointless.
Instead, I’m going to look at what I want to accomplish in the coming year. It gives me a chance to analyze what I’m doing and what I want to be working on. And it’s a whole lot easier than predicting that SDN is going to take everyone’s job or OpenFlow being dead again.
Write Like the Wind
My biggest goal for 2016 was to write more. And that I did. I worked in writing any time I could. I wrote about ONUG, SD-WAN, and other fun topics. I even wrote a small book! Finding time to work all the extra typing in to my Bruce Wayne job at Tech Field Day was a bit challenging here and there. And more than once I was publishing a blog post at the deadline. But all Continue reading
Summary of Pol Pot: Anatomy of a Nightmare
Overview
I’ve decided to start a reading project on genocides and violent totalitarian dictators. Most education about these topics in the US is focused around Nazi Germany, or occasionally the Soviet Union under Stalin. While I’d like to come back to those events if I can endure the topic that long, I’m starting with non-Western events.
First up is Pol Pot and the Khmer Rouge, partly because I grew up in the 1980s around a lot of first or second-generation Cambodian and Vietnamese immigrants, but never knew much about the politics behind their flight from Southeast Asia. It’s a particularly strange case of different cultural, political, and historic influences converging in a disastrous way. The term “genocide” has been controversial with reference to the Khmer Rouge regime: while they systematically murdered or starved somewhere between 1.7 and 2.3 million people, for the most part the killings didn’t target a specific racial, ethnic, or religious group. While there were certainly elements of this – as I’ll discuss – Pol Pot’s regime was more about brutal slavery and vicious punishment of any deviance, regardless of the person.
This post is based on the book Pol Pot: Anatomy of a Nightmare Continue reading
Example API calls using CURL
Example on making REST API calls to phpipam API server.How and why the leap second affected Cloudflare DNS
At midnight UTC on New Year’s Day, deep inside Cloudflare’s custom RRDNS software, a number went negative when it should always have been, at worst, zero. A little later this negative value caused RRDNS to panic. This panic was caught using the recover feature of the Go language. The net effect was that some DNS resolutions to some Cloudflare managed web properties failed.
The problem only affected customers who use CNAME DNS records with Cloudflare, and only affected a small number of machines across Cloudflare's 102 PoPs. At peak approximately 0.2% of DNS queries to Cloudflare were affected and less than 1% of all HTTP requests to Cloudflare encountered an error.
This problem was quickly identified. The most affected machines were patched in 90 minutes and the fix was rolled out worldwide by 0645 UTC. We are sorry that our customers were affected, but we thought it was worth writing up the root cause for others to understand.
A little bit about Cloudflare DNS
Cloudflare customers use our DNS service to serve the authoritative answers for DNS queries for their domains. They need to tell us the IP address of their origin web servers so we can contact the Continue reading
Orhan Ergun Youtube Channel
Orhan Ergun Youtube Channel I have been sharing technology based videos on my youtube channel for some time. I will hopefuly share more often public videos out there ! I just don’t want to share technical videos, but my training updates, bootcamp announcements, success stories and the things which make me happy or mad ! […]
The post Orhan Ergun Youtube Channel appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Is Cisco CCDE Exam Vendor Neutral ?
Is Cisco CCDE Exam really vendor neutral?.Recently one of my CCDE Bootcamp students asked me this question. He heard that DMVPN might come in the exam. In the beginning of my each CCDE class, I introduce the topics which will most likely asked in the CCDE Practical exam. Cisco claims that CCDE Practical exam is […]
The post Is Cisco CCDE Exam Vendor Neutral ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
LSA issue @ January 1, 2017 at 02:13PM
Hey there, engineers! Its January 1st 2017 and we are happy to welcome you and wish you all the best.But is it 2017 indeed? How would one tell if his clock is good, if its in sync with the world clock? Yeah, you got it, in the era of the leap second and New YearEP10: From Dubai to Silicon Valley, interview with LinkedIn’s lead architect Shawn Zandi
Shawn Zandi is a principal network architect with LinkedIn, where he builds large scale data center, backbone and networks. Over the past two decades, Shawn has worked as network and security architect for consulting firms from Dubai to Silicon Valley. Shawn holds many publications, patents and certifications including 3x CCIE in routing and switching, Security and Service provider as well as CCDE, while through the years of practice has become a vendor-neutral consultant. He currently lives in San Francisco, in Sunny California. In addition to his commitment to LinkedIn, Shawn is a technical advisor to networking startups in the Bay Area.
Quote: RFC1925 – The Twelve Networking Truths Rule (11)
Every old idea will be proposed again with a different name and a different presentation, regardless of whether it works.
Resources or Topics Mentioned:
Tech Lesson of the Day: Applying Machine Learning and Big Data to Networking
My Personal Look Back on 2016
I haven't ever written a “year in review” type of post before. Sure, I do a post to summarize how the blog has done over the year but I've never done a personal look back. Last night-New Years Eve-I was thinking about everything that I was involved in during 2016 and I realized “I should write this down! I was involved in or a participant of some amazing things last year!”
So here we go. In an effort to show a more personal side and not just my geeky side, here is my personal 2016 year in review.