When an AP fails to obtain 6GHz SP spectrum allocation when querying the AFC server, the AP's behavior depends on the AP model and its configuration.
You can configure an AP to fall back to LPI if obtaining the SP Spectrum channel plan from the AFC server fails.
Low Power Indoor (Default)
In Low Power Indoor (LPI) mode, 6GHz radios use power and channel settings from the regulatory compliance table compliance table and the AP does not require AFC spectrum. The AP goes into service immediately after it boots. LPI operates over U-NII 5,6,7, and 8. A radio that is configured with LPI mode is not an AFC AP, and does not appear on the AFC tab.
Standard Power (with fallback to LPI)
In standard power (SP) mode, AP 6GHz radios can operate at SP or LPI. The SP power level depends on geo-location coordinates of the AP and on receiving AFC spectrum from the AFC server. If AFC spectrum is not available, the radio falls back to the LPI power level. In SP mode the channel list is limited to U-NII 5, and 7 (in the US). As soon as ExtremeCloud IQ and ExtremeCloud IQ Controller determines the geo-location for the AP and receives AFC spectrum from the server, the 6GHz radio transitions to the SP power level. If the AFC spectrum cannot be renewed, the 6GHz radio falls back to the LPI power level.
The list of supported channels in LPI fallback mode is limited to the channels supported by SP mode. This way, the AP will not have to change channels when switching between SP and LPI modes.