Need to block Apple TV discovery across WAN links
I have a ICX 7450 and multiple ICX 7250s connected using OSPF on a layer 2 WAN. Many of the sites have Apple TV devices. Locations are able to see the Apple TV's from all locations. Therefore, I need to block this discovery and keep it contained at each location. What ports do I need to configure in an ACL to drop this type of traffic?