24 10/100 Mbps ports; 2 10/100/1000 Mbps ports; 2 Combo mini-GBIC ports. Performance: Switching capacity 12.8 Gbps, nonblocking, Forwarding rate 9.52 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).