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 ...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
