Hi friend,
1. AP id can be modified, but you need to delete the AP to register and go online, the AP will restart.
Run system-view
The system view is displayed.
Run wlan
The WLAN view is displayed.
Run ap-rename { ap-name name | ap-mac ap-mac-address | ap-id ap-id } new-name ap-new-name
A new name is configured for an AP.
2. Radio all means all radio frequencies, 2.4G == 0, and 5G == 1/2.
Hope to help you!