I ran into an issue on a Cisco 9800 WLC after upgrading to 17.12.6a with the standard install workflow. The installation itself completed successfully, but the controller did not boot cleanly on the first reload. What happened I started the… Read moreCisco 9800: Wrong Boot Variable After Upgrade to 17.12.6a
We recently ran into an interesting issue with Ekahau AI Pro in an enterprise environment using SSL inspection. Symptom: Cloud projects would not load at all. Root cause (most likely): As soon as SSL inspection was disabled on the… Read moreEkahau AI Pro Cloud Projects won’t load with SSL Inspection
TLDR; How to update CIMC 2.x/3.x to a recent version starts below at “Update Procedure” Storytime I support a Cisco Wireless infrastructure for a hospital with about 2.000 APs and 3 5520 WLCs. The environment was on 8.5.151 and the… Read more5520 AireOS CIMC Update
As different wireless exams ask for theoretical knowledge about the PHYs, I googled for an overview of all PHYs in a single table. I was not able to find one and therefore created such a table based on the CWNA-108… Read more802.11 Physical Layers (PHYs)
One of my most used tools is definitely my WLAN Pi. It’s so flexible and has various tools installed. I can capture packets and power it over PoE. I often plug it in using its usb interface to my computer… Read moreJoin WLAN Pi to a 802.1X WiFi with EAP-TLS
Cisco offers an option to put newly joined APs into a special AP-group. This group called “Out-Of-Box” sets per default the radios administratively down and does not include any WLANs. The thoughts behind this are, that brand new APs can… Read moreOut-Of-Box AP-Group
Gerade in der Release note entdeckt was die kryptischen Dateinamen der Autonomous AP Images zu bedeuten haben. Des Weiteren kann man anhand des Dateinamen auch rauslesen, ob es sich um ein Autonomous, Lightweight oder Recovery Image handelt. Darüber Auskunft gibt… Read moreCisco Autonomous AP Image filename
Die SMS Funktion wurde bei Sophos auf Basis eines Feature Request in der Version 9.2.x irgendwann man eingeführt, verschwand dann allerdings wieder aus dem GUI. Zweischenzeitlich war recht unklar, wann und wie die Funktion eingeführt wird. Der Feature Request ist… Read moreSophos SMS Gateway Funktion
Step 1) Bootvorgang abbrechen durch drücken des Mode Buttons. ap: dir List of filesystems currently registered: flash[0]: (read-write) xmodem[1]: (read-only) null[2]: (read-write) tftp[5]: (read-only) ap: dir flash: Directory of flash:/ 2 -rwx 287 info 3 -rwx 140 env_vars 4 -rwx… Read moreCisco 1702 CAPWAP to Autonomous – Quick Tutorial
In letzter Zeit häufiger realisiert eine WLAN Punkt zu Punkt Verbindung. Die alten Hasen kennen sicherlich noch die 1310er Outdoor Bridges von Cisco, die man dazu üblicherweise verwendet hat, heutzutage kann man dazu eigentlich jeden beliebigen Indoor / Outdoor Accesspoint aus… Read moreMesh Point to Point Link mit VLAN Support