Then from the HM GUI they can issue “show int eth0 | inc duplex”. This will show them the speed and duplex that the AP’s are connected at. I suggest you export the results and use shortcuts to find keywords such as “half” and “100”.
AP230-0232c0#sho int eth0 | inc duplex
Operational state=up; Duplex=full-duplex; Speed=1000Mbps;