N3K-C31108PC-V Specification
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Physical
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● 1RU fixed form factor
● Cisco Nexus 31108PC-V
◦ 48 SFP ports support 1 and 10 Gigabit Ethernet
◦ 6 QSFP28 ports support 4 x 10 Gigabit Ethernet or 40 Gigabit Ethernet each or 100 Gigabit Ethernet.
● Redundant fans (3+1)
● 2 redundant power supplies
● Management, console, and USB flash-memory ports
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Performance
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● 2.16-Tbps switching capacity and forwarding rate of up to 1.2 bpps for 31108PC-V and 31108TC-V
● Line-rate traffic throughput (both Layer 2 and 3) on all ports
● Configurable maximum transmission units (MTUs) of up to 9216 bytes (jumbo frames)
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Hardware tables and scalability
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Number of MAC addresses
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288,000
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Number of VLANS
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4096
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Number of spanning-tree instances
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● RSTP: 512
● MSTP: 64
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Number of ACL entries
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● 16,000 ingress
● 1000 egress
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Routing table
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● 16,000 prefixes and 16,000 host entries
● 8000 multicast routes
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Number of EtherChannels
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64 (with vPC)
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Number of ports per EtherChannel
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32
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System memory
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16 GB
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Buffer size
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16 MB shared
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Boot flash
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64 GB SSD (31108PC-V, 31108TC-V, and 31108TCV-32T)
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Power
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Number of power supplies
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2
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Power supply types
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● AC (forward and reverse airflow)
● NXA-PAC-650W-PE and NX-PAC-650W-PI (31108 models)
● DC (forward and reverse airflow)
● NXA-PDC-930W-PE and NX-PDC-930W-PI (31108 models)
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Typical operating power
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● Cisco Nexus 31108PC-V: 150W
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Maximum power
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● Cisco Nexus 31108PC-V: 360W
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AC PSUs
● Input voltage
● Frequency
● Efficiency
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● 100 to 240 VAC
● 50 to 60 Hz
● 89 to 91% at 220V
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DC PSUs
● Input voltage
● Maximum current (PSU output – System input)
● Efficiency
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● –40 to –72 VDC
● 33A (400W unit), 78A (930W unit)
● 85 to 88%
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Typical heat dissipation
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● Cisco Nexus 31108PC-V: 512 BTU/hr
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Maximum heat dissipation
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● Cisco Nexus 31108PC-V: 1228 BTU/hr
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Cooling
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● Forward and reverse airflow schemes:
◦ Forward airflow: Port-side exhaust (air enters through fan tray and power supplies and exits through ports)
◦ Reverse 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)
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Sound
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Measured sound power (maximum)
● Fan speed: 40% duty cycle
● Fan speed: 70% duty cycle
● Fan speed: 100% duty cycle
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● 64.9 dBA
● 69.3 dBA
● 76.7 dBA
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Environment
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Dimensions
(height x width x depth)
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● Cisco Nexus 31108PC-V, 31108TC-V, and 31108TCV-32T: 1.72 x 17.3 x 22.3 in. (4.4 x 43.9 x 56.6 cm)
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Weight
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● Cisco Nexus 31108PC-V: 21.4 lb (9.7 kg)
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Operating temperature
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● 32 to 104°F (0 to 40°C)
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Storage temperature
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● –40 to 158°F (–40 to 70°C)
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Operating relative humidity
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● 10 to 85% noncondensing
● Up to 5 days at maximum (85%) humidity
● Recommend ASHRAE data center environment
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Storage relative humidity
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● 5 to 95% noncondensing
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Altitude
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● 0 to 10,000 ft (0 to 3000m)
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