As you may already know, one of the requirements to use all the available wifi US 5GHz channels is supporting DFS on the Access Point; when DFS is enabled, it scans active and inactive 5Ghz channels for a minute at a time to ensure that there is no conflict with any radar signals which may also operate in this spectrum. If radar pulses are detected, that channel is black-holed for at least 30 minutes.
DFS detects radar operating close to our site; however, I'm curious whether there is a list of DFS black-holed channels in the WLC... so far, I've been turning up a big zero... all I can find are SNMP traps from the controller...
Channel changed for Base Radio MAC: de:ad:be:ef:00:00 on 802.11a radio. Old Channel: 56. New Channel: 161. Why: Radar. Energy before/after ^^^^^ change: 0/0. Noise before/after change: 0/0. Interference before/after change: 0/0.
Is there a way to find the current list of DFS-blackholed channels via the console or GUI? If so, how?