Retransmissions of frames in WLANs (Wireless Local Area Networks) can become problematic for several reasons, primarily due to the nature of the wireless medium. While retransmissions are a necessary part of ensuring data integrity in unreliable networks, they can cause inefficiencies and degrade network performance. I will get to the details below, but let’s start […]
Recognizing WLAN Retransmissions is a Critical Skill Read More »
Service provider technicians need routine Wi-Fi skills training and they need to know how to troubleshoot Wi-Fi networks for several important reasons: Troubleshooting Wi-Fi networks is essential for service provider technicians to ensure reliable service, maintain customer satisfaction, and keep up with the fast-paced advancements in networking technology. Because the Wi-Fi network environment is ever
Why ISP Technicians Need Routine Wi-Fi Skills Training Read More »
Here is our second attempt at answering the question – we will call it Option 2. You can find the first article here. This question comes up all the time, and the answers can be quite varied. Seems simple enough at first glance, right? But the problem is that things are not simple, especially in
How to discover what is on your LAN (IPv4 and IPv6) or WLAN – Option 2 Read More »
Scenario Let’s say you have a DHCP server running on a Cisco Switch that is behaving strangely and you want to examine the traffic over a couple of hours while not creating a gigantic unmanageable capture file. A note here: I am doing this on a Cisco switch, but most all vendor switches support this
Troubleshooting Your Network Using Port Mirroring and Packet Capture Read More »
In this article, I wanted to provide a guide to using ping – ICMP Echo – to troubleshoot your network. Most people use ping on their platform to test if they can reach a given destination. Just open up a terminal (Linux or MAC OSx) or command line (Windows: Start> Run> cmd) and enter the
Troubleshooting The Internet Using Ping (a.k.a. ICMP) Read More »
This blog article is a culmination of my years of experience in the networking and computing worlds. Over those years, where I began as a bench and field technician, I have had a number of classes that my employers sent me to to teach troubleshooting skills. Usually termed with the words “logical troubleshooting” or something
A Dive Into Network Troubleshooting Read More »
Just like out article on Network Management Tools (you can read/view that list here), I wanted to compile a list of Networking Utilities and Tools in this article. These are software programs. All these tools can be essential to troubleshooting network issues, as well as learning how the network works. If you are looking for
Networking Utilities and Tools Read More »
Sometimes troubleshooting in Wireshark is easy-ish, you find a misbehaving protocol behavior or pattern or even a bad packet, sometimes it is tricky and takes a while to find something, and sometimes it is as clear as mud. Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on
Real-life Wireless Wireshark Troubleshooting Example Read More »
Monitoring, analyzing, managing, and diagraming a network can often be a huge problem for Network and System Administrators. They are often vendor specific or cost large sums of money to license. We also have the challenge of so many different network infrastructures, like Wi-Fi and wired. If you are looking for a list of tools
A List of Network Monitoring Tools for Network and System Administrators Read More »
For those of you who love Wireshark and are supporting Wi-Fi Wireless networks, we would like to offer a great default profile for WiFi. Let’s make no bones about this capturing and analyzing Wi-Fi traffic is not as easy (you have to be in Monitor Mode) as just selecting this profile and clicking capture.
A Wireshark Wi-Fi WLAN Troubleshooting Configuration Profile 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 What Students are saying about this class “Best Wireshark course on the market – bar none!” “Instructor has great depth on the topics and can present
CSI-HO-020-A – Explore Packet Analysis with Wireshark Standard Edition – 2 Day 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: CellStream has developed a number of variants of this skills-based course using MPLS network emulations and Wireshark.
CSI-HO-005 – Hands-On MPLS Troubleshooting Skills Read More »
