34 – Q-in-VNI and EFP for Hosting Providers
Dear Network and DCI Experts !
While this post is a little bit out of the DCI focus, and assuming many of you already know Q-in-Q, the question is, are you yet familiar with Q-in-VNI? For those who are not, I think this topic is a good opportunity to bring Q-in-VNI deployment with VXLAN EVPN for intra- and inter-VXLAN-based Fabrics and understand its added value and how one or multiple Client VLANs from the double encapsulation can be selected for further actions.
Although it’s not an unavoidable rule per-se, some readers already using Dot1Q tunneling may not necessarily fit into the following use-case. Nonetheless, I think it’s safe to say that most of Q-in-Q deployment have been used by Hosting Provider for co-location requirements for multiple Clients, hence, the choice of the Hosting Provider use-case elaborated in this article.
For many years now, Hosting Services have physically sheltered thousands of independent clients’ infrastructures within the Provider’s Data Centers. The Hosting Service Provider is responsible for supporting each and every Client’s data network in its shared network infrastructure. This must be achieved without changing any Tenant’s Layer 2 or Layer 3 parameter, and must also be done as quickly as possible. For many years, the co-location Continue reading
Q&A: Ingress Traffic Flow in Multi-Data Center Deployments
One of my readers was watching the Building Active-Active Data Centers webinar and sent me this question:
I'm wondering if you have additional info on how to address the ingress traffic flow issue? The egress is well explained but the ingress issue wasn't as well explained.
There’s a reason for that: there’s no good answer.
Read more ...No, it’s Matt Novak who is a fucking idiot
I keep seeing this Gizmodo piece entitled “Snowden is a fucking idiot”. I understand the appeal of the piece. The hero worship of Edward Snowden is getting old. But the piece itself is garbage.The author, Matt Novak, is of the new wave of hard-core leftists intolerant of those who disagree with them. His position is that everyone is an idiot who doesn’t agree with his views: Libertarians, Republicans, moderate voters who chose Trump, and even fellow left-wingers that aren’t as hard-core.
If you carefully read his piece, you’ll see that Novak doesn’t actually prove Snowden is wrong. Novak doesn’t show how Snowden disagrees with facts, but only how Snowden disagrees with the left-wing view of the world. It’s only through deduction that we come to the conclusion: those who aren’t left-wing are idiots, Snowden is not left-wing, therefore Snowden is an idiot.
The question under debate in the piece is:
technology is more important than policy as a way to protect our libertiesIn other words, if you don’t want the government spying on you, then focus on using encryption (use Signal) rather than trying to change the laws so they can’t spy on you.
On a Continue reading
Python Basics – Part 1
Let’s start with Python basics, with the help of program .Theory part in posts is just enough to understand the program.
Python Data Type:
- Numbers
- Strings
- List
- Tuple
- Dictionary
- Numbers :
- Int 1 ,10,-145, 22
- Float 1.1,0.9,-29.9
- Complex 1.4j, 4e+6j
- Strings
Way to remember how slices work in string is to think of the indices as pointing between characters, with the left edge of the first character numbered 0. Then the right edge of the last character of a string of n characters has index n, for example:
“Crazyouters ” represented in indices form
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| C | r | a | z | y | r | o | u | t | e | r | s |
| -11 | -10 | -9 | -8 | -7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 |
Program Code : Str.py
Output
There are special operators in strings
Program Code : str1.py
Output
3. List
The list is a most versatile datatype available in Python which can be written as a list of comma-separated values (items) between square brackets. Important Continue reading
Python – Must for Network Engineer
Automation is need of Time.We as network engineers have to go with automation to simplify major chunk of the work done by us.We can not escape from automation.I will be having series of Python posts starting from basics.I will try to put all learning in post in most easiest way.
Let’s start with Basics.What is Python ? As per Wiki ,Python is a widely used high-level, general-purpose, interpreted, dynamic programming language.
In layman terms , it’s one of the coding language much simpler, easy to understand and most importantly reduces number of code lines in C++ to fewer lines.
It was created by Guido van Rossum during 1985-1990.
Installation:
Note:We will be doing coding in Python 3.
Windows: can be installed from Site :http://www.python.org
Linux: run below mentioned command
$ sudo apt-get install python 3.5
OpenStack SDN With OVN (Part 1) – Build and Install
This is a first of a two-post series dedicated to project OVN. In this post I’ll show how to build, install and configure OVN to work with a 3-node RDO OpenStack lab.
Continue readingAs The Server Goes, So Goes The World
At this point in the 21st Century, a surprisingly large portion of the manufacturing, warehousing, distribution, marketing, and retailing of every good and service known to humankind is dependent on a piece of circuit board with two Xeon processors welded to it, wrapped in some bent sheet metal with a few blinky lights peeking out of the darkness.
Back in 1885, as the United States was beginning its rise to power, Reverend Josiah Strong declared in his populist book, Our Country: “As America goes, so goes the world.” National borders and national interests still exist, but networks cross boundaries …
As The Server Goes, So Goes The World was written by Timothy Prickett Morgan at The Next Platform.