Cisco WS-C3550-12G Switch Guide - Page 162
Software Features continued
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Fixed Switches: Cisco Nexus 3000 Series Software Features (continued) Description Specification Nexus 3064 Switch Quality of Service (QoS) • Layer 2 IEEE 802.1p (class of service [CoS]) • 8 hardware queues per port • Per-port QoS configuration • CoS trust • Port-based CoS assignment • Modular QoS CLI (MQC) compliance • ACL-based QoS classification (Layers 2, 3, and 4) • MQC CoS marking • Differentiated services code point (DSCP) marking • Weighted Random Early Detection (WRED) • CoS-based egress queuing • Egress strict-priority queuing • Egress port-based scheduling: Weighted Round-Robin (WRR) • Explicit Congestion Notification (ECN) Security • Ingress ACLs (standard and extended) on Ethernet • Standard and extended Layer 3 to 4 ACLs include IPv4, Internet Control Message Protocol (ICMP), TCP, and User Datagram Protocol (UDP) • VLAN-based ACLs (VACLs) • Port-based ACLs (PACLs) • Named ACLs • ACL logging and statistics • ACLs on virtual terminals (VTYs) • Dynamic Host Configuration Protocol (DHCP) snooping with Option 82 • DHCP relay • Dynamic Address Resolution Protocol (ARP) inspection • Configurable Control Plane Policing (CoPP) 160