Blog
Field notes on complex Wi-Fi.
PoE for Wi-Fi Explained
PoE is one of those topics everyone assumes is solved. You plug the access point in, it powers up, the survey looks fine, and the project moves on. Then someone measures two spatial streams on a 4x4 access point, or notices that the 6 GHz radio never came up, and the investigation ends at the switch.
François Vergès, CWNE #1806 min read
12 posts
Most recent first
How to Establish a Console Connection to a Juniper SRX with an AirConsole
Juniper Networks is a leading provider of networking equipment and solutions for businesses of all sizes. One of their most popular products is the Juniper SRX series of security gateways, which provide advanced threat protection, network segmentation, and secure connectivity for enterprise networks.If you need to establish a console connection to a Juniper SRX device, you can use the AirConsole device to connect to the console port. In this tutorial, we'll walk you through the steps to connect your macos laptop to the SRX console using AirConsole via Bluetooth.
François Vergès, CWNE #1803 min read
Calculate 802.11 Retry Rate with Wireshark
There are many broadcast and unicast messages between a user and an access point that the user has no idea about! So what if some of them fail while you are streaming or having an internet-based call? A low-quality call? Lags and buffering? Slow uploads and downloads?Probably all of them! Why? Because for every failure in communications, there will be a retry, and once these retries increase, they will affect your service indirectly.
Amin SedighFar, CWNE #6224 min read
The 802.11ax Trigger Frame
In 802.11ax communications, the trigger frame is used for multiple purposes. One of them is to allocate ressources for a specific multi-user OFDMA transmission.
François Vergès, CWNE #1803 min read
Wireshark – Find out the data rate of an 802.11ax Data Frame
As you know, all data rates are changing with 802.11ax, Hence, the new MCS table you can find here: https://www.semfionetworks.com/blog/mcs-table-updated-with-80211ax-data-rates
François Vergès, CWNE #1803 min read
802.11ax Remote Packet Captures using the Jetson Nano
This solution will allow you to perform remote 802.11ax packet capture from your own laptop using the Jetson Nano. The benefit of using the Jetson Nano (and the Intel AX200 Wi-Fi card) to perform 802.11ax packet capture is that you get a lot more information in the RadioTap Header you get. The benefit of doing it remotely is that you never need to directly interact with the Jetson Nano OS (no need for keyboards, screens nor mouses)
François Vergès, CWNE #1803 min read
DFS Operations Infographic
This infographic was inspired by the work of Nigel Bowden and Devin Akin. Nigel wrote this really good article on DFS that you can find on his website wifinigel.blogpost.com. Devin presented a really detailed webinar on DFS in partnership with Netscout. You can find the recording here.
François Vergès, CWNE #1801 min read
Wireshark: How to check if a Wi-Fi network supports 802.11k
Today’s exercice is simple: study the beacon frame and try to figure out what characteristics of the Wi-Fi network are advertised.
François Vergès, CWNE #1803 min read
How to check if a client device supports 802.11v
This post is directly related to the following previous article: "Wireshark: How to check it a Wi-Fi Network Supports 802.11v".
François Vergès, CWNE #1804 min read
Wireshark: How to check if a Wi-Fi network supports 802.11v
Today's exercice is simple: study the beacon frame and try to figure out what characteristics of the Wi-Fi network are advertised.
François Vergès, CWNE #1802 min read
Easily use AirConsole on MacOS X
I have recently purchased a AirConsole unit from www.get-console.com. The delivery was fast. Unfortunately the setup was not as smooth as I would have thought. I had to contact the support team which helped me to get it working.
François Vergès, CWNE #1803 min read
Wireshark – Most Common 802.11 Display Filters
I often use Wireshark as my go to packet analyzer. I like it but I feel like I always forget what the display filters are. So I always find myself searching them online over and over again. So I have decided to create a reference sheet I could store and share on the blog.
François Vergès, CWNE #1801 min read
Wireshark: How to check if a data frame is sent using 802.11n
Studying for the CWAP exam, I was using Wireshark and wondering how to see if the traffic (data frames) I was capturing was using HT (or 802.11n). So this article will show you how to find out!
François Vergès, CWNE #1802 min read