• Cisco N3K-C31128PQ-10GE switch with 96x10G SFP+ and 8x40G QSFP+ ports
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Cisco

Cisco N3K-C31128PQ-10GE | Nexus 3100 96-Port 10G SFP+ Switch, 8x 40G QSFP+, Layer 3

N3K-C31128PQ-10GE

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Description

The Cisco Nexus N3K-C31128PQ-10GE is a high-density, high-performance data center switch designed for top-of-rack and leaf deployments. With 96 SFP+ ports for 10 Gigabit Ethernet and 8 QSFP+ ports for 40 Gigabit Ethernet in a compact 2RU form factor, it delivers exceptional port density and scalability for modern data centers. Running Cisco NX-OS, it offers comprehensive Layer 2 and Layer 3 routing capabilities, low latency for HFT and HPC workloads, and flexible airflow options for diverse deployment scenarios.

Features

Cisco NX-OS operating system with modular, resilient architecture
- Layer 2 switching with VLAN, STP, RSTP, MSTP, PVRST+ support
- Layer 3 routing with BGP, OSPF, EIGRP, RIPv2, static routing
- Multicast routing with PIM-SM, PIM-SSM, IGMPv2/v3, MSDP
- Virtual PortChannel (vPC) for enhanced redundancy and bandwidth
- Equal-Cost Multi-Path (ECMP) routing for load balancing
- Access Control Lists (ACL) for security and traffic filtering
- Quality of Service (QoS) with DSCP, CoS, 8 hardware queues per port
- Weighted Random Early Detection (WRED) and Weighted Round Robin (WRR)
- PowerOn Auto Provisioning (POAP) for zero-touch deployment
- Cisco Embedded Event Manager (EEM) and Python scripting for automation
- Advanced buffer monitoring for real-time port and queue utilization
- Ethanalyzer built-in packet analyzer based on Wireshark
- DHCP relay, DHCP snooping, and ARP inspection
- VRF-Lite for multi-tenancy and network segmentation
- SPAN and ERSPAN for traffic mirroring and monitoring
- UDLD, PortFast, Root Guard, and control plane protection
- LLDP, Syslog, and comprehensive MIB support
- Precision Time Protocol (PTP) for time synchronization
- SDN-ready with OpenFlow support and Cisco DCNM integration
- Hot-swappable redundant power supplies and fan modules

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

96x 10GBASE-X SFP+ ports for 10 Gigabit Ethernet
- 8x 40GBASE-X QSFP+ ports for 40 Gigabit Ethernet
- Layer 3 managed switch with full routing protocol support
- Switching capacity: 2.5 Tbps
- Forwarding rate: 1.4 Bpps (billion packets per second)
- MAC address table: 288,000 entries
- 4,096 VLANs supported
- Jumbo frame support: 9,216 bytes
- Form factor: 2RU rack-mountable
- Dimensions: 17.4 in (W) x 23.7 in (D) x 3.4 in (H)
- Weight: 22.20 lb (approx 10.1 kg)
- Power consumption: 396W operational
- Redundant hot-swappable power supplies (2x)
- Redundant fan modules (2x)
- Management interfaces: 1x 1000BASE-T RJ-45, 1x RS-232 console, 2x USB
- Management protocols: SNMP v1/v2/v3, SSH-2, Telnet, CLI, RMON, TFTP
- Operating system: Cisco NX-OS
- Airflow options: Forward (port-side exhaust) or reverse (port-side intake)
- Power input: AC or DC options available

FAQs

Q: What routing protocols does the Nexus 31128PQ support?
A: The switch supports a comprehensive Layer 3 routing suite including BGP, OSPF, EIGRP, RIPv2, VRRP, PIM-SM, PIM-SSM, MSDP, and policy-based routing. Layer 3 routing features require additional NX-OS licensing beyond the base Layer 2 software.

Q: Is this switch suitable for high-frequency trading or HPC applications?
A: Yes, the Nexus 31128PQ delivers low nominal latency and line-rate performance, making it ideal for latency-sensitive workloads such as high-frequency trading and high-performance computing environments in data centers.

Q: What airflow options are available for this switch?
A: The switch supports both forward airflow (port-side exhaust) and reverse airflow (port-side intake) configurations, allowing flexible deployment in hot-aisle or cold-aisle data center layouts. Both AC and DC power options are available.

Q: Can this switch be used as a leaf switch in a spine-leaf architecture?
A: Absolutely. The Nexus 31128PQ is well-suited for data center leaf or top-of-rack deployments, offering high port density with 96x 10G and 8x 40G ports, line-rate Layer 2 and Layer 3 switching, and support for Virtual PortChannel (vPC) for redundancy.

Q: What licensing is required for full Layer 3 functionality?
A: The base NX-OS system includes comprehensive Layer 2 features, security, and management. To enable full Layer 3 IP unicast and multicast routing functions, additional NX-OS feature licenses must be purchased and installed separately.

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