Here is the second post of the series on basic network troubleshooting tests and tools under RHEL / CentOS. In this post, I will talk about the Linux mtr command.
Read More...Basic Linux Networking tips and tricks part-2: the mtr command
2019 IT Blog Awards finalist!
I have the honor of having my blog selected as a finalist in the Most Educational category of the 2019 IT Blog Awards, hosted by Cisco.
Read More...Basic Linux Networking tips and tricks part-1: ip and nmcli commands
We have all heard, at one time or another, a system administrator blaming the network. Then, it is up to the network engineers to prove that the network is not in cause. To do this, a minimum of network troubleshooting skills on Linux systems could be required. Here is a series of posts on basic network troubleshooting tests and tools under RHEL / CentOS.
Read More...Cisco Nexus NX-OS tips and tricks
As you can see here, I have been using Cisco Nexus NX-OS for many years. And even more intensively since a few months, as I work for a data center now. During all this time, I accumulated a nice collection of NX-OS tips and tricks. Here it is. I hope this can help you to improve your daily work.
Read More...New bookshelf page
I just created a new bookshelf page to list all the IT / networking / programming books that I have read or I am currently reading.
Read More...Shutdown thousands access ports with Python and Netmiko
When people ask me “what a network engineer should do to start in network automation?”, my first answer is: start with small things. Try to automate basic and repetitive tasks you do every day. Go after the low-hanging fruits first. Then, step by step, you can do more and more complex things. This is how I learn the best. In the same vein, I want to share with you my recent experience of automating a very basic and repetitive task: shutdown thousands of unused network access ports.
Read More...100Gb Ethernet transceivers, modules and form factors on Cisco products
At the time of the 400Gb Ethernet interfaces introduction, here is a summary of the different form-factors, transceivers and modules available for 100Gb Ethernet on Cisco devices. As you will see below, there are many different types of 100Gb Ethernet transceivers. And each type have its own functional mode. In a next article, I will try to explain the differences between them and will give more details about the most common: the QSFP-28.
Read More...Multicast lab 5: Source-Specific Multicast (SSM)
After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.
Read More...Multicast lab 4: Any-Source Multicast with Bootstrap Router (BSR)
After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.
Read More...Multicast lab 3: Any-Source Multicast with anycast RP
After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.
Read More...Multicast lab 2: Any-Source Multicast with auto RP
After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.
Read More...Multicast lab 1: Any-Source Multicast with static RP
After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.
Read More...IT Blog Awards Finalist!
I have the honor to have my blog selected as a finalist in the Best Cert Study Journey category of the IT Blog Awards, hosted by Cisco. Voting is now open to everyone until January 4th, here! Here, in my opinion, are my two best articles related to the category “Best Cert Study Journey”: My journey to network programmability and automation 6 CCIE strategy mistakes Thank you in advance for your support!
Read More...How to install EVE-NG on Microsoft Hyper-V
Recently, my license for Cisco VIRL expired and I wanted to test alternatives to have a lab on my laptop. I got used to install the client and the server parts of VIRL on my laptop, to not have to worry about connectivity when I want to do a lab or a demo to a colleague or a customer. With the exceptional opportunities of the different cloud solutions actually, this is probably not the best solution, but it suits me well for a small lab and I’d like to continue…
Read More...Python script and multiple API calls practice with Google and Twitter
After doing a lot of Python tutorials and spending time “playing” with Postman and API calls during my journey to network programmability and automation, I wanted to make a concrete example, from zero to a visible result. Since I love photography and my country is full of beautiful but not well-known places, I chose to do the following: Take the complete list of municipalities, towns and villages in my country. Choose one location per day, randomly, in this list. Search and download a photo of this place on Google map, including…
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