Today’s exercice is simple: study the beacon frame and try to figure out what characteristics of the Wi-Fi network are advertised. In this article, we will be focusing on IEEE 802.11k support. PRESENTATION OF IEEE 802.11K IEEE 802.11k-2008 or "Radio Resource Measurement" (not to confused with the Radio Resource Management used by Cisco Wireless LAN Controllers) [...]
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This post is directly related to the following previous article: "Wireshark: How to check it a Wi-Fi Network Supports 802.11v". In the previous article, we talked about how to check if a specific Wi-Fi network is supporting IEEE 802.11v, from the access point perspective. Like anything in Wi-Fi, we need support from both the access [...]
Today's exercice is simple: study the beacon frame and try to figure out what characteristics of the Wi-Fi network are advertised. In this first article, we will be talking about 802.11v. PRESENTATION OF IEEE 802.11V IEEE 802.11v or BSS Transition is an amendment which was published in 2011 and added to the IEEE 802.11-2012 standards. [...]
I usually support and configure Cisco wireless networks using the GUI. However, the CLI is sometimes required to perform some troubleshooting or configuration tasks. So I put together another reference guide. This one outlines the most useful Cisco AireOS commands. Feel free to download and use the reference sheet as much as you want. I [...]
I first wanted to call this article "How to get ready for a validation survey". However, following the talk from Jake's blog post on the importance of functional validation testing along with the actual validation survey, I decided to give it this present title. Indeed, I totally agree with Jake that validating the performance of a Wi-Fi [...]
If you are like me and you love interference stories, this is one of them! I came across this interesting interference while I was performing an assessment for one client. At first I had no idea what it could be and I didn't know if the 2 pics were part of the same signal or [...]
I have had in mind to update the logo of the company for its 2 years anniversary (which was in march 2016). I finally got the time to take care of it this summer! Here is the new SemFio's logo: Along with the new logo, the website has also been updated to match the new [...]
Performing a spectrum analysis for one of my customer last week, I discovered a funny interference I wanted to share with you. The interference was found in a training classroom of a typical office environment. As you can see, the interference was about 20MHz wide and kind of looked like what a Wi-Fi signal would [...]
The CWNP program has really helped me to know how to do my job. I started to read the CWNA book as soon as I got introduced to Wi-Fi and I loved the vendor-neutral way to learn a technology (802.11 in this case). My journey to becoming CWNE #180 has been very exciting and rewarding. [...]
Performing site surveys can sometimes be a long and repetitive task. I have been thinking of putting some tips/jokes together to help other WLAN pros make it more interesting! TIP #2 - WEAR WORK BOOTS! Sometimes it is required by the client to wear boots because you will need to survey areas where wearing boots [...]
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