What do "your" WiFi clients support?
February 23, 2016The need to know "what my clients support" is common. For example, before enabling a certain frequency or feature on your WLAN, like channel 144 or 80...
Read MoreArchive of classic posts • Wireless, route, switch stuff.
The need to know "what my clients support" is common. For example, before enabling a certain frequency or feature on your WLAN, like channel 144 or 80...
Read MoreWhy do I blog? Well, here's a good example. Forcing myself to research at a level I might not ordinarily do, in order to not publish inaccuracie...
Read MoreThe topic of "do you trust RRM" is often discussed. The most typical answer is: "Yes, if I understand it." I know I've personally spent numerous hours...
Read Moreclients.mikealbano.com If it's not obvious, the capabilities of clients using the network directly impacts the WiFi design. Among the swath of 'option...
Read MoreSo you walk into a large public venue (LPV), Stadium, or Lecture Hall and pull up your favorite mobile WiFi scanner app and there it is; CCI out the y...
Read MoreIn the Cisco landscape today, there are three features that usually come up in the same conversation. They all solve what I'd call "related" problems,...
Read More...or "How many clients can I put on an AP?". These two questions, more than most, will get you an "it depends" answer. There is a hard limit on 'numb...
Read MoreManaging about ~12 WLC's (and countless Routers/Switches/FW's/Servers etc.), I use Linux tools and scripts, like the one below, every day. Can't reall...
Read MoreThere's some great new inclusions in the latest WiFi Scanner by Accessagility , taken from the 802.11 Information Elements (IE) of Beacon Frames. Belo...
Read MoreI set out to experiment with just how much faster roaming occurs on an 802.1X WPA2-Enterprise WLAN, when 802.11r is enabled. Also, what is the time di...
Read MoreWhen it comes to controller discovery there are a couple different ways to set it up. My personal favorite is to utilize DHCP options. When I ch...
Read MoreBelow is my attempt to lay out what happens when an 802.11 Wireless device (STA) wants to send a frame over the medium (air). Whether the STA is a cli...
Read MoreWhile Ookla (speedtest.net) is a great resource when out on public networks, I'd recommend having something on your LAN for more consistent and thorou...
Read MoreLike many, I recently updated OSX to the latest version. After doing so, I could no longer connect to my 5GHz SSID. Immediately, I'm blaming the upgra...
Read MoreEducation goes a long way. I've found that setting expectations and creating a sense of ownership helps more than a...
Read MoreLong story short: Bonjour service advertisements, including those sent from Apple TV's, have a destination address of link-local multicast 224.0.0.251...
Read MoreRADIUS has been around a while (RFC’s dating back to the 90’s) and it’s uses are very broad. <Disclaimer> This is not a verbose RADIUS tut...
Read MoreNeighbor messages, by default, are sent every 60 seconds over the air (DS bit set to 11) to multicast address 01:0B:85:00:00:00. They include the deta...
Read MoreI wrote this plugin to monitor the currently associated Access Points on a Cisco Wireless Lan Controller in Nagios. It throws an 'Critical' aler...
Read MoreMy intepretations after working with TAC to identify what the reason codes mean for a WLC DCA Channel Change: This is viewable in WCS/NCS/PI, and is i...
Read MoreFrom cisco support forums 802.11 Association Status Codes Code 802.11 definition Explanation 0 Successful 1 Unspecified failure For example : wh...
Read Moreconfig ap mode se-connect <ap_name> AP will need to reboot. Launch Cisco Spectrum Expert on a windows PC (I have not tried to install this on wi...
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Read Moretaken from Keith Parsons: http://sharkfest.wireshark.org/sharkfest.10/B-5_Parsons%20HANDS-ON%20LAB%20-%20WLAN%20Analysis%20with%20Wireshark%20&a...
Read MoreCapture 802.11 from OSX /usr/libexec/airportd en0 sniff <channel> It saves it to a file in /tmp /System/Library/PrivateFrameworks/Apple80211.fra...
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