1) Generally the impact will be minimal as most of this is done in ASICs, there may be a small overhead for the first packet when the forwarding tables are populated. (I’m not fully up to speed on the MS switches, and it’s probably different for the MS390 switches too). 2) Not that I’m aware of, all ACLs configured on a network are applied to all switches in that network. Note the limitation of ‘Maximum ACL limit is 128 access control entries (ACEs) per network’. Also with the MS390, note that it currently ignores any ACLs where a VLAN is specified.
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