For best article visual quality, open Tutorial for creating first external SDN application for HP SDN VAN controller – Part 2/3: Influencing Flows via cURL commands directly at NetworkGeekStuff.
In this tutorial series, I will show you by example, how to build your first external REST API based SDN application for HP SDN VAN controller, with web interface for the user control. Target will be to learn how to use REST API, curl and perl scripting to generate some basic and useful code to view and also manipulate network traffic.
This article is part of “Tutorial for creating first external SDN application for HP SDN VAN controller” series consisting these articles:
In this Part 2/3, we will discuss how to create a few cURL commands in linux environment, authenticate to the controller REST API interface and generate flows to modify the forwarding path overriding the controller decisions.
Lets start with the basics, in linux console exists Continue reading
Python is one of the easiest programming languages to learn, because of it’s inherent flexibility. (This can be a good thing as well as a bad thing.)
One example of Python’s flexibility is the double parentheses. Take the following snippet for example:
print funcwrapper(3)(2)
Even an inexperienced programmer should be able to make sense of most of this. Reading from left to right, it looks like we want to print the output of a function, and we’re passing an integer - 3 - to that function. However, the second pair of parentheses doesn’t quite make sense.
This notation is different from what we would do if we wanted to pass two arguments to a function; in that case, we’d put them all inside a single pair of parentheses and separate them via commas:
print funcwrapper(3, 2)
So what does the first example using two pairs of parentheses accomplish?
The use of a double parentheses is actually an indicator of one of Python’s coolest features - and that is that functions are themselves, objects! What does this mean?
Let’s work our way up to the snippet above by first defining a very simple function - something that takes an integer Continue reading
A cat sets a world record. A surgical robot gets hacked. Capsela was a sweet toy. Oculus Rift is going to be available soon. Larsen B is falling into the Antarctic Ocean. Spotify takes on video. All this & more on this week's Citizens of Tech with Eric Sutphen & Ethan Banks.
The post Citizens of Tech 004 – Retro Virtual Reality Kittehs appeared first on Packet Pushers.
A cat sets a world record. A surgical robot gets hacked. Capsela was a sweet toy. Oculus Rift is going to be available soon. Larsen B is falling into the Antarctic Ocean. Spotify takes on video. All this & more on this week's Citizens of Tech with Eric Sutphen & Ethan Banks.
The post Citizens of Tech 004 – Retro Virtual Reality Kittehs appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Tsk, tsk, Cisco -- a possible Nutanix acquisition and illegal deals with the Russians? Find out more in this week's roundup!
Vijay Sagar and Aaron Edwards of CloudGenix discuss the software defined WAN with the Packet Pushers. We've heard from CloudGenix before on Priority Queue Show 49. If you missed that show, you might want to give it a listen first to get the most out of this podcast. On this show, we go a bit deeper into CloudGenix -- what it does, how it does it, and how you'd integrate it into your network.
The post Show 238 – A Deeper Look at SD-WAN with CloudGenix – Sponsored appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Welcome to Technology Short Take #51, another collection of posts and links about key data center technologies like networking, virtualization, cloud management, and applications/operating systems. Here’s hoping you find something useful in this collection!
It has been an exciting week here at Plexxi! Dr. Doug Comer spent the day with us on Wednesday learning about our products and new network architecture. Dr. Comer is an internationally recognized networking guru, widely known for his series of groundbreaking textbooks on computer networks, the Internet, computer operating systems and computer architecture (including the popular ‘Internetworking with TCP/IP’). He designed and implemented X25NET and Cypress networks as well as the Xinu operating system. He is currently a professor of computer science at Purdue University where he teaches courses on operating systems and computer networks. It was a pleasure having him at the Plexxi headquarters—we hope he learned as much from us as we did from him! Take a look at a few photos from his visit.
Below please find a few of our top picks for our favorite news articles of the week. Have a great Memorial Day weekend!
InfoWorld: 3 ways the data lake is actually not helping with IT agility
By Yves de Montcheuil
Loosely speaking, a data lake is the big data version of an operational data store, plus a network storage appliance, plus data processing/query engines, all combined — typically in a Hadoop cluster Continue reading
If you want 'security by default,' hardware is the place to be, even in a software-defined world.
With all the hype around Segment Routing we said: “let’s chat about it, what could possibly go wrong”. The result: Episode 33 of Software Gone Wild. We didn’t get very far into the technical details, but you might still find the overview useful (or not – do tell me how good or useless it is).
Q2 revenue falls yet again for networking and software.
Telecommunications providers discuss opportunities provided by SDN, NFV, and NaaS