*FREE* – Learn SDN!
Click Here to go to our Online Courses.
*FREE* – Learn SDN! Read More »
*FREE* – Learn Python
To view this course click the link below: Click Here to go to our Online Courses. Below is a screen shot of what the course looks like at the Online School (none of the links or the video can be viewed here):
*FREE* – Learn Python Read More »
*FREE* – Fiber Optics Termination
Contained in this course are a series of videos demonstrations/tutorials that show you how to terminate Fiber Optics using the appropriate tools. Click Here to go to our Online Courses. Are you looking for some network tools that include great fiber toolkits? Look here. This is a free, self-paced course available at the Online School of
*FREE* – Fiber Optics Termination Read More »
IPv4/IPv6 Path MTU (PMTU) Discovery Demystified
Check out these additional IPv6 Resources: Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6 classes at the Online School A major change in the behavior of IP networks between IPv4 and IPv6 is that in IPv6 networks, all hosts are required to support something called Path MTU (PMTU) discovery.
IPv4/IPv6 Path MTU (PMTU) Discovery Demystified Read More »
Creating Delay to a Subnet Tech Tip
I received a question on how to create a delay to a subnet using GNS3. Below is my answer:
Creating Delay to a Subnet Tech Tip Read More »
GNS3 in Linux – Tech Tip – Docker Error
I recently watched a YouTube video where one of the GNS3 creators was talking about GNS3 and how it runs. This convinced me to consider moving my GNS3 development work to the Linux world. I had done this years ago for the hands on training classes but my own development environment has been Windows based.
GNS3 in Linux – Tech Tip – Docker Error Read More »
The Linux ‘ip’ Command in Networking
One way to examine your network configuration in Linux is to use the “ip” command. I have attached a cheat sheet from Red Hat. By itself, it will show its options: So much going on here, and I find the help and man pages to be light on clarity and examples. So let’s explore.
The Linux ‘ip’ Command in Networking Read More »
Detecting ECMP in Linux using Paris and Dublin Traceroute
Equal-Cost Multi-Path (ECMP) is a forwarding mechanism for routing packets along multiple paths of equal cost with the goal to achieve almost equally distributed link load sharing. This, of course, significantly impacts a router’s next-hop (path) decision. For further details, look at RFC 2991, “Multipath Issues in Unicast and Multicast Next-Hop Selection,” and RFC 2992,
Detecting ECMP in Linux using Paris and Dublin Traceroute Read More »
Linux Starting Point – Commands You Need To Know
My recent blog post regarding Linux being the operating system of choice if you are supporting/testing/operating a network has spawned some great discussion. Emerging the discussion has come a request to write up a starting point list of commands for Linux beginners. I said “Sure, I can do that!” I thought it would be simple
Linux Starting Point – Commands You Need To Know Read More »
What is the ‘cat’ command, and how can I use it?
The ‘cat’ [short for “concatenate“] command is one of the most frequently used commands in Linux and other operating systems. The cat command allows us to create single or multiple files, view contain of file, concatenate files and redirect output to the terminal or to files. The command is available in Linux, Windows Power Shell, and MAC-OS.
What is the ‘cat’ command, and how can I use it? Read More »
IPv6 Settings (SYSCTL) on Linux
Check out these additional IPv6 Resources: Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6 classes at the Online School Is there a simple way to display all the IPv6 settings on a Linux machine? Absolutely! I have done the following on Debian/Ubuntu Linux. For the newbies most system settings
IPv6 Settings (SYSCTL) on Linux Read More »