Shared: Allocates exclusive priority space for vlan based static rules. This will allow for rules to be re-used between ports/vlans. Use this mode when the ACL hardware resource are more heavily used and you want to fit more rules into the hardware but installation performance is less of a concern.
Dedicated:Vlan based static rules share the priority space with other rules. Use this mode when the ACL hardware resource utilization is less of a concern but installation performance is a concern.