18 10/100/1000 ports; 2 Combo mini-GBIC ports. Performance: Switching capacity 40.0 Gbps, nonblocking, Forwarding rate 29.76 mpps wire-speed performance. Layer 2: Port grouping up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad link aggregation, Number of VLANs 256 active VLANs (4096 range), Head-of-line (HOL) blocking HOL blocking prevention. Layer 3: IPv4 routing Wirespeed routing of IPv4 packets, Up to 512 static routes and up to 128 IP interfaces, Classless Inter-Domain Routing (CIDR) support for CIDR. QoS: Priority levels 4 hardware queues, Scheduling Priority queuing and weighted round-robin (WRR), Queue assignment based on DSCP and class of service (802.1p/CoS).