The Cisco Catalyst 6500 Series Distributed Forwarding Card 3 (DFC3), is an optional daughter card for CEF720-based line cards. The DFC3 series provides localized forwarding decisions for each line card & scales the aggregate system performance to reach up to 400 mpps. The new DFC3B card offers enhancements to support Multiprotocol Label Switching (MPLS) & Access Control Entries (ACE) counters on the Cisco 6700 Series line cards.