The Cisco Nexus® 3172PQ 3172TQ 3172TQ-32T 3172PQ-XL and 3172TQ-XL Switches are dense high-performance 10- and 40-Gbps Layer 2 and 3 switches that are members of the Cisco Nexus 3100 switch platform. All switches offer improved port density and scalability in compact one-rack-unit (1RU) form factors. The Cisco Nexus 3172 switches run the industry-leading Cisco® NX-OS Software operating system which helps ensure continuous availability and sets the standard for mission-critical data center environments. They are well suited for data centers that require cost-effective power-efficient line-rate Layer 2 and 3 top-of-rack (ToR) switches. These switches also support forward and reverse airflow (port-side exhaust and port-side intake) schemes with AC and DC power inputs.