Troubleshooting

Why ISP Technicians Need Routine Wi-Fi Skills Training

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Post Views: 2,094 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

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How to discover what is on your LAN (IPv4 and IPv6) or WLAN – Option 2

Networking and Computing Tips and Tricks / By

Post Views: 8,276 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

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Troubleshooting Your Network Using Port Mirroring and Packet Capture

Networking and Computing Tips and Tricks / By

Post Views: 5,727 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

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Troubleshooting The Internet Using Ping (a.k.a. ICMP)

Networking and Computing Tips and Tricks / By

Post Views: 3,570 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)

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Important Updates to Wireshark for Voice and VoIP

Networking and Computing Tips and Tricks / By

Post Views: 2,238 Hi 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

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Wireshark 3.5 Development Release adds significant voice upgrades

Networking and Computing Tips and Tricks / By

Post Views: 63,211 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

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Getting started with iPerf – an illustrated step by step procedure

Networking and Computing Tips and Tricks / By

Post Views: 12,237 In 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

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Networking Utilities and Tools

Networking and Computing Tips and Tricks / By

Post Views: 5,380 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

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Real-life Wireless Wireshark Troubleshooting Example

Networking and Computing Tips and Tricks / By

Post Views: 1,640 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

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A List of Network Monitoring Tools for Network and System Administrators

Networking and Computing Tips and Tricks / By

Post Views: 8,871 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

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Leveraging Logging for Troubleshooting Using Cisco IOS

Cisco Router and IOS How To's / By

Post Views: 5,121 Whenever 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

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A Wireshark Wi-Fi WLAN Troubleshooting Configuration Profile

Networking and Computing Tips and Tricks / By

Post Views: 24,509  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

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A Wireshark TCP Troubleshooting Configuration Profile

Networking and Computing Tips and Tricks / By

Post Views: 2,813   Most network engineers and technicians are quickly discovering that with “everything over IP” we are required to understand exactly what this means.  For a lot of the standard, traditional data communications between clients and servers this means transport over TCP.   Furthermore, it requires the ability to troubleshoot TCP.  To troubleshoot

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