The Supervisor Engine 720 features the PFC3B, which is equipped with a high-performance ASIC complex supporting a range of hardware-based features. The PFC3B supports routing and bridging, QoS, and multicast packet replication, and processes security policies such as access control lists (ACLs). The Supervisor engine 720 has a field-upgradeable Policy Feature Card3. The PFC3B is equipped with a high performance ASIC complex supporting a range of hardware based features. The PFC3B supports IPv4, IPv6 routing and bridging functionality, quality of service (QoS) and multicast forwarded and ACL-based policies.