The Cisco Catalyst 8540 16-port Fast Ethernet interface modules are ideal for supporting Layer 3 backbone applications that require non-blocking, wire-speed performance.The 16-port Fast Ethernet interface modules provide full wire-speed Layer 3 switching and support 16K or 64K IP/ IPX entries depending on the size routing table required. A version of Fast Ethernet cards is available with a pre-installed access control list (ACL) daughter card when data path ACL functionality is required. The primary application for these modules is non-blocking, wire-speed Fast Ethernet aggregation.