See below for the broadcast option in the wired ap port profile:
This knob is effective only on wired ports in tunnel mode. When this knob is diasbled, flooded traffic from other Wired APs (in both tunnel and split-tunnel forwarding modes) and Virtual APs (in Tunnel, Decrypt Tunnel , and Split Tunnel forwarding modes ) will not be flooded to this Wired AP. In order for this to work, the Wired AP, where the Broadcast knob is set to disable, must be in the tunnel forwarding mode.
Note: Disabling this knob on a wired port might break communication between users/phones on this port and the users/phones on other VAPs or wired ports that are on the same VLAN.