| Description | Specification | |
| Physical | – 1RU fixed form factor ◦ 48 SFP ports support 1 and 10 Gigabit Ethernet ◦ 6 QSFP ports support 4 x 10 Gigabit Ethernet or 40 Gigabit Ethernet each | |
| Performance | – 1.4-Tbps switching capacity – Forwarding rate of up to 1 bpps – Line-rate traffic throughput (both Layer 2 and 3) on all ports – Configurable maximum transmission units (MTUs) of up to 9216 bytes (jumbo frames) | |
| Hardware tables and scalability | Number of MAC addresses | 288,000 |
| Number of VLANS | 4096 | |
| Number of spanning-tree instances | – RSTP: 512 – MSTP: 64 | |
| Number of ACL entries | – 4000 ingress – 1000 egress | |
| Routing table | – 16,000 prefixes and 16,000 host entries* – 8000 multicast routes* | |
| Number of EtherChannels | 64 (with vPC) | |
| Number of ports per EtherChannel | 32 | |
| System memory | 4 GB (3172PQ, 3172TQ, and 3172TQ-32T) | |
| Buffer size | 12 MB shared | |
| Boot flash | 2 GB (3172PQ, 3172TQ, and 3172TQ-32T) | |
| Power | Number of power supplies | 2 |
| Typical operating power | 143 W | |
| Maximum power | 293W | |
| AC PSUs – Input voltage – Frequency – Efficiency | – 100 to 240 VAC – 50 to 60 Hz – 89 to 91% at 220V | |
| DC PSUs – Input voltage – Maximum current (PSU output – System input) – Efficiency | – –40 to –72 VDC – 33A (400W unit), 42A (500W unit) – 85 to 88% | |
| Typical heat dissipation | 488 BTU/hr | |
| Maximum heat dissipation | 1000 BTU/hr | |
| Cooling | – Forward and reversed airflow schemes: ◦ Forward airflow: Port-side exhaust (air enters through fan-tray and power supplies and exits through ports) ◦ Reversed airflow: Port-side intake (air enters through ports and exits through fan-tray and power supplies) – Redundant fans – Hot swappable (must swap within 1 minute) | |
| Sound | Measured sound power (maximum) – Fan speed: 40% duty cycle – Fan speed: 70% duty cycle – Fan speed: 100% duty cycle | – 64.9 dBA – 69.3 dBA – 76.7 dBA |
| Environment | Dimensions (height x width x depth) | 1.72 x 17.3 x 17 in. (4.4 x 43.9 x 43.2 cm) |
| Weight | 18.6 lb (8 4 kg) | |
| Operating temperature | – 32 to 104°F (0 to 40°C) | |
| Storage temperature | – -40 to 158°F (-40 to 70°C) | |
| Operating relative humidity | – 10 to 85% noncondensing – Up to 5 days at maximum (85%) humidity – Recommend ASHRAE data center environment | |
| Storage relative humidity | – 5 to 95% noncondensing | |
| Altitude | – 0 to 10,000 ft (0 to 3000m) | |
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