For APs with 2 uplink Ethernet ports such as AP-135, AP-225 & AP-275 that has two Ethernet ports connected; these APs are capable of operating in active-standby mode state. So this will ensure one will be actively sending data traffic and other port on standby mode.
The AP-225, we do support active-active operation starting from 22.214.171.124 however these are applicable only when LACP enabled.When the APs are connected to the default/assigned group and with default setting with no Wired config enabled no the APs they default come up active-standby mode either E0 or E1 going active
Since these APs has dual link to connect we may suspect a possible loop due the APs when we troubleshoot issue related to broadcast flood/unstable network however the following command will help us know the status of E0 and E1 so we can eliminate the possibility AP causing loop on the network.
#show ap debug system-status ap-name <name of the AP>