I implore all my readers to always remember this topic: IGP LDP synchronization. It is important to use IGP LDP synchronization to avoid blackholing, especially when MPLS networks fails to function effectively. In the topology above, IS-IS is running in the network of the service provider. For the transport label distribution or topmost label/tunnel label, […]
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Happy New Year! As is my tradition, here are the 2015 blog statistics as compared to 2014.
I'm pretty excited that once again readership and overall reach of this blog has increased by double digits. I'm looking forward to growing these numbers and creating challenging and interesting new content in 2016.
Wow, it’s that time of year again! 2015 went by really quickly, and a lot has changed for me. It’s also worth mentioning that this is the first year-end recap to be published on my new github pages site!
If you haven’t seen this kind of thing before, I make this post yearly to publicly track my own professional development goals. I find this helps me stay accountable to these goals, and it also allows others to give me a kick in the butt if I’m falling behind.
First, let me recap some of the goals I set for myself at the beginning of the year, and see how well I did.
Last year I added this goal because I was doing a lot more than just blogging, and wanted to capture it all. This was a good move, since - as expected - I did quite a bit of community-oriented work, and a large portion of it didn’t take place on the blog. So, while I didn’t hit that (admittedly fairly arbitrary) 50 post number, I can say I truly feel good about what little writing I did manage to Continue reading
In early 2015, I posted a look ahead at my planned 2015 projects, where I took a quick look at some of the self-development projects I set out for myself over the course of 2015. In this post, I’m going to review my progress on those 2015 projects.
The 2015 projects were as follows:
So, how well did I do? Let’s take a look.
Complete a new book: Technically, I haven’t (fully) completed a new book, but given that my new book project with Jason Edelman and Matt Oswalt on network automation is available now as an Early Access edition, I suppose this should count for something. Strangely enough, this wasn’t the book project I had in mind at the start of 2015, but sometimes things like this take unexpected turns. Grade: C
Make more open source contributions: I expected this one to be easy, but it turns out that this is the area where my performance is the worst. I submitted a pull request to Terraform (for a docs update), but I did not make the contributions Continue reading
The industry mourns a key figure in the history of open source software.
They like to rename things that everyone else is also doing.
It’s been a big year of expansion for CloudFlare’s global network as we added new data centers across six continents, and we’re certainly not done. Today we announce the launch of our newest data center in Cairo, Egypt and a partnership with Telecom Egypt. This marks our third data center in Africa, after Johannesburg and Mombasa, and our 74th data center globally.
For many years, CloudFlare has been trusted by Egyptian websites to be protected from attacks.
Over half of the 20 most popular websites in Egypt already use CloudFlare to be safe, and are now seeing a 2x improvement in performance.
Reduced latency to Egypt's largest network, Telecom Egypt
Just like in Egypt, we partner with ISPs globally by deploying caches directly into their facilities. These points of presence help major networks improve the performance of millions of websites, reduce their costs and capacity used in accessing our customers' content, and provide a direct local interconnect with critical Internet infrastructure. If you are a carrier or Internet service provider in Egypt, elsewhere in Africa or anywhere around the world that would like to request a CloudFlare cache deployment, please reach out to Continue reading
HPE will have to share the NFV glory but says it's not out of Telefónica's plans.
Read the full Q&A and watch the video for the SDxCentral NV Report Webinar sponsored by Avaya where experts elaborate on why network virtualization and SDN should reach further than the data center.
The main purpose of this work is to show results of benchmarking some of the leading in-memory NoSQL databases with a tool named YCSB.
We selected three popular in-memory database management systems: Redis (standalone and in-cloud named Azure Redis Cache), Tarantool and CouchBase and one cache system Memcached. Memcached is not a database management system and does not have persistence. But we decided to take it, because it is also widely used as a fast storage system. Our “firing field” was a group of four virtual machines in Microsoft Azure Cloud. Virtual machines are located close to each other, meaning they are in one datacenter. This is necessary to reduce the impact of network overhead in latency measurements. Images of these VMs can be downloaded by links: one, two, three and four (login: nosql, password: qwerty). A pair of VMs named nosql-1 and nosql-2 is useful for benchmarking Tarantool and CouchBase and another pair of VMs named nosql-3 and nosql-4 is good for Redis, Azure Redis Cache and Memcached. Databases and tests are installed and configured on these images.
Our virtual machines were the basic A3 instances with 4 cores, 7 GB RAM and 120 GB disk Continue reading
Register today for the SDxCentral and Pluribus Networks Network Virtualization Report webinar where you'll learn the true value of analytics and insights in the data center.
Only a few years old, NFV passed some milestones in 2015.
Getting to the point where big is never big enough, one may think “What’s cooking?” Well, BGP in the DC is a subject that’s been under my radar for some time, so the purpose of this article is to get things a bit more straight-forward regarding the WHYs and HOWs.
A look in the past
First of all, we should ask ourselves who was Clos. Charles Clos started his work at Bell Labs, mainly focusing on finding a way to switch telephone calls in a scalable and cost-effective way. In 1953, he published the paper “A Study of Non-Blocking Switching Networks”, where he described how to use equipment having multiple stages of interconnections to switch calls.
The crossbar switches (you may think of them as common use switches with a defined number of ports) connected in a three-stage network (ingress, middle, egress) form the so called Clos network.
This had a pretty big use back in the 1950’s but once the level of circuit integration got to the point where interconnections would no longer be a problem, it was no longer of interest, at least for some time. Until huge scale data centers came to be needed (and Continue reading
It's been a year of learning about new products, new markets... and giraffes.
This website is a fantastic resource for Mac OS X Users. Hundreds of A curated list of shell commands and tools specific to OS X. “You don’t have to know everything. You simply need to know where to find it when necessary.” (John Brunner) https://github.com/herrbischoff/awesome-osx-command-line
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