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802.11 - Action Frames
The 802.11 standard section 8.5 comments on action frames. Action frames are interesting. Action frames can be triggered by access points or client stations. The action frame provides information and...
View ArticleCisco 8.0 MR3 Beta Open to Public
Cisco announced public participation in 8.0 M3 beta testing. If you're interested visit Cisco Support Community. https://supportforums.cisco.com/discussion/12755726/80mr3-beta-availability...
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802.11 - TIM and DTIM Information Elements
In this blog post I investigate 802.11 TIM and DTIM. Read the entire blog post here: http://community.arubanetworks.com/t5/Technology-Blog/802-11-TIM-and-DTIM-Information-Elements/ba-p/256997 Traffic...
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"Wi-Fi doesn't stand for anything. It is not an acronym. There is no meaning.”
Let's start 2016 with a blog post that will surely get some of you thinking. As a professional who focuses on Wi-Fi communication I’m asked from time to time what does Wi-Fi mean? The conversation...
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802.11 - Reason Codes and Status Codes
802.11 - Reason Codes and Status Codes The 802.11 standard section 8.4 comments on reason codes and status codes. I’ve used these myself when troubleshooting frame captures. These codes provide...
View Article30 Random Technical Thoughts by a WiFi Engineer
1) CRC is cyclic redundancy check. This means a radio received a frame and failed the checksum. A normal communication the intended receiver will not ACK and the sender will retransmit the frame....
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802.11 Packet Capture Skillz To Pay The Bills
Digging deep into the Stefanick archives of real world 802.11 issues. I challenge YOU with 4 real world examples. Keep in mind sometimes the obvious is not so obvious. While frames don’t lie...
View ArticlePrime AP Migration Tool - Part 1
Mark at IPTel is sharing some of his scripts to help with controller upgrades! Check it out and let us know what you think! This article is the first in a series dedicated to how to upgrade your...
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Prime AP Migration Tool - Part 2
In this second article on how to seamlessly upgrade your Cisco WLC, we explore the migration process and how to use the free tool IPTel have built for the purpose. If you've not see the other two...
View ArticlePrime AP Migration Tool - Part 3
In the third part of our series of articles on how to seamlessly upgrade your Cisco WLC infrastructure, we'll examine the important thing to think about - the caveats, hints and tips for a smooth...
View ArticleCisco WLC Release 8.2.111.x Beta
8.2MR2 (Future 8.2.120.0) is now available for beta testing. The planned CCO release is July If you are interested in participate on the beta program, please send email to...
View ArticleMicrosoft changes go in to effect which affect the ability to run older...
Important reminder – Deadline January 1 2017Microsoft changes go in to effect which affect the ability to run older versions of AnyConnect on Windows platforms (pre 3.1MR13 or 4.2MR1) As an important...
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Apple iOS 10 Beta Sysdiagnose Logging
If you blinked you might have missed Apple’s mention of the new Sysdiagnose logging. While little is known to the general public, there is hope it might include Wi-Fi logs for network troubleshooting...
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End-of-Sale and End-of-Life Announcement for the Cisco Unified Wireless IP...
Cisco announces the EOS and EOL for Cisco Wireless handset 7925G, 7925G-EX, and 7926G. The replacement handset is the Cisco 8821. Customers looking for a 7926G scanner replacement Cisco recommends the...
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NETSCOUT AirCheck G2 v1.1 Introduces #13 New Features
NETSCOUT’s AirCheck G2 is far and beyond the best tool I have in my wireless tool bag and it just got a whole lot better with this latest release. As an early beta tester I was excited to get my hands...
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End-of-Sale and End-of-Life Announcement for the Cisco Flex 7510 Wireless...
Cisco announces the end-of-sale and end-of-life dates for the Cisco Flex 7510 Wireless Controller. The last day to order the affected product(s) is April 10, 2017. Customers with active service...
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End-of-Sale and End-of-Life Announcement for the Cisco Wireless Services...
Cisco announces the end-of-sale and end-of-life dates for the Cisco Wireless Services Module 2 (WiSM2). The last day to order the affected product(s) is April 10, 2017. Customers with active service...
View ArticleEnd-of-Sale and End-of-Life Announcement for the Cisco Aironet Access Point...
Title: End-of-Sale and End-of-Life Announcement for the Cisco Aironet Access Point Module for 802.11ac Description: Cisco announces the end-of-sale and end-of-life dates for the Cisco Aironet Access...
View ArticleTAC Recommended AireOS Builds 1/25/2017
You want to upgrade your AireOS. You might want to start here first! So you want to upgrade your controllers? What better place to start then a TAC recommend list. If you're like me you will want to...
View ArticleOnion Approach to wifi troubleshooting basics - Same, Better or Worse
I learned long ago working with end users is sometimes a blessing and a curse. Users have valuable information that will enable us as WiFi engineers to get a glimpse to the issues they are having. At...
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Wireless Network Design that Scales to Business Demands #INTEROP
I'm presenting Wireless Network Design that Scales to Business Demands. Save 20% off any pass with our exclusive promo code: STEFANICK https://l.feathr.co/interop-itx-george-stefanick-n
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Field Notice: FN - 64274 - CP-8821 Fails in Wireless LAN...
We recently deployed 8821 phones in our environment. The past few weeks have been a challenge for us because of these issues. Most of our issues have subsided with the code update and configuration and...
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Cisco Meshed Wireless LAN Controller Impersonation Vulnerability
Summary A vulnerability in the mesh code of Cisco Wireless LAN Controller (WLC) software could allow an unauthenticated, remote attacker to impersonate a WLC in a meshed topology.The vulnerability is...
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Intel Wireless - WLAN Driver Release Notes
Did the title get your attention ? In the last month or so Intel has quietly added driver release notes to their latest two driver releases, 19.60 and 19.70. What you might find interesting, Intel...
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Intel Wireless NIC Product Line Detail and Comparison
When dealing in a multi WiFi NIC environment, especially when dealing with a single vendor, WiFi NIC information should be handy. Here is a link that you should bookmark....
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My Personal CWSP Flash Card Deck
I made my personal CWSP Flash Card Deck available. If you master these 230+ cards you are well on your way to pass the CWSP exam. Very detailed flash cards, 20 a day keeps you sharp! Enjoy! I plan to...
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A closer look at Apple MAC Book Pro Enterprise Roaming - SKC and OKC
Hello Wi-Fi Peeps! The question comes up from time to time about using a Mac Book Pro OSX for real-time video. While it can be done and works well most of the time in a stationary fashion you need to...
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Clear To Send Podcast: Ekahau Side Kick, Spectrum Analysis, and Finnish Rap
I'd like to thank Clear To Send and Jussi for having me during this podcast. Want to learn more about the new Side Kick?...
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Field Notice: FN - 70208 - Aironet 1560, 2800, and 3800 Series Access Points...
Wireless clients might intermittently be unable to pass traffic after association. https://www.cisco.com/c/en/us/support/docs/field-notices/702/fn70208.html?emailclick=CNSemail
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iOS 13 and iPadOS Wi-Fi Diagnostics
At Active Expert we understand Wi-Fi reliability does not stop with a proper design. It’s only the beginning. Understanding devices and how they operate is critical to Wi-Fi reliability. This new...
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