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 »
Click Here to go to our Online Courses.
*FREE* – Learn Netmiko! Read More »
Click Here to go to our Online Courses.
*FREE* – Learn Ansible! Read More »
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 »
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 »
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 »
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 »
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 »
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 »
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 »
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 »
CellStream, Inc. – Telecom Consulting and Training! 2-Day Instructor Led Hands On Lab Class Available in either Web Based delivery or On-Site Delivery Minimum 10 students – Maximum 16 students Course Description: As more and more networks undertake the Internet Protocol Version 6 (IPv6), details of security weaknesses
CSI-HO-018-B – Hands On Advanced IPv6 Security Read More »
Check out these great references as well:  Our custom profiles repository for Wireshark  Our Udemy course on Wireshark  Our Udemy course on Wireless Packet capture A great question and problem. The fundamental answer is you can’t. Why? Depends on who you believe. My conclusion is that Wireshark (really dumpcap) has to use either Npcap or
Using Wireshark to capture between VirtualBox VM’s Read More »
