Views: 2,381A recent discussion with several colleagues led to a discussion on how AI can be leveraged in the world of internetworking. With all the hype around AI, some pretty crazy things are being claimed by vendors, but looking under the surface requires specific solutions and, frankly, things become very vendor specific very quickly. I
How can AI be used in Networking? Read More »
Views: 5,557Retransmissions 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
Recognizing WLAN Retransmissions is a Critical Skill Read More »
Views: 2,257Service 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
Why ISP Technicians Need Routine Wi-Fi Skills Training Read More »
Views: 8,874Here 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
How to discover what is on your LAN (IPv4 and IPv6) or WLAN – Option 2 Read More »
Views: 6,329Scenario 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
Troubleshooting Your Network Using Port Mirroring and Packet Capture Read More »
Views: 3,953In 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
Troubleshooting The Internet Using Ping (a.k.a. ICMP) Read More »
Views: 25,700This 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
A Dive Into Network Troubleshooting Read More »
Views: 2,451Hi everyone! Happy Thanksgiving 2021. Just released – Wireshark 3.6.0!!! Why is this important to me, you, and everyone who troubleshoots Voice traffic using Wireshark? Well, there are many changes to the voice related functionality in Wireshark in this (actually as part of the development 3.5.0 – you can read more on that here)
Important Updates to Wireshark for Voice and VoIP Read More »
Views: 64,736 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 Hi Everyone! If you are like me, you use Wireshark every day. For me that means troubleshooting many different network applications and traffic types, including Voice traffic –
Wireshark 3.5 Development Release adds significant voice upgrades Read More »
Views: 12,649In this article we will get you started with the iPerf tool. We will be using it in a Linux environment, but know that it is available for all systems at http://iperf.fr. iPerf is used to test performance, throughput, packet loss, and jitter on TCP/IP networks. iPerf defaults to testing TCP – port number 5002.
Getting started with iPerf – an illustrated step by step procedure Read More »
Views: 5,612Just 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
Networking Utilities and Tools Read More »
Views: 12,917 As explained in our prior article on QUIC, you may be seeing a lot of QUIC traffic in your packet captures. Assuming you have read that article, and understand that all QUIC traffic is encrypted, you know the only way was to see some of the details is using Chrome itself. Today it
Using Wireshark to Analyze QUIC Traffic Read More »
Views: 1,756Sometimes 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
Real-life Wireless Wireshark Troubleshooting Example Read More »
Views: 9,208Monitoring, 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
A List of Network Monitoring Tools for Network and System Administrators Read More »
Views: 5,417Whenever we teach our Hands-On courses, we always have a section of the course that discusses troubleshooting the network or technology the class is learning. A key part of troubleshooting any network is knowing the technology, no argument. But even the masters of technologies like Multicasting, or IP Networking, or MPLS, still can benefit
Leveraging Logging for Troubleshooting Using Cisco IOS Read More »
