We have been seeing input errors and giants on our switch ports where our APs are connected. The issue seems to be the MTU size set on the controller. Reading on the forum and contacting TAC we have been informed to set the SAP MTU to 1500 on the AP System Profile.
Now, my question is, what is the default setting for the MTU size on the controllers? When the SAP MTU field is left blank, it shows N/A on the CLI for the MTU size. Changing this field shows what ever number you set the field to.