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N5K-C56128P
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Nexus 56128P 2RU Chassis, 48x10G SFP+, 4x40G QSFP+
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Name:
N5K-C56128P
- Description:
- Nexus 56128P 2RU Chassis, 48x10G SFP+, 4x40G QSFP+
- Rating:
Added to cart 28 times recently
- Availability:
Ready to Ship
- Brand:
- Cisco
- GTIN:
- 0582723251124
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
- Warranty:
- 3
- List Price:
$37,695.00
- Price:
$13,489.0064.2% off
Quantity:
1
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N5K-C56128P Overview
N5K-C56128P is a high-performance switch designed to meet modern data center demands with a robust modular architecture that supports both Layer 2 and Layer 3 functions. Built with advanced power supply options including redundant AC power, it features extensive port configurations and a design optimized for scalability, ensuring that networks can grow without compromising on performance.
Optimized for demanding applications, the N5K-C56128P offers reliable stacking capability and high switching capacity that address the needs of large-scale enterprise and cloud environments. Its flexible port and expansion slot design, incorporating fixed high-speed Ethernet and uplink ports, make it an ideal choice for mission-critical use cases such as data center interconnects and virtualized deployments.
N5K-C56128P price is $13,489.00, a 64.2% saving from the Cisco list price of $37,695.00. N5K-C56128P is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for N5K-C56128P for additional pricing. Browse the full Nexus 5000 Switches series or explore all Cisco products.
N5K-C56128P Specifications
- Product Type
- Switch
- Brand
- Cisco
- Power Source
- Redundant Power Supply / AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- 350 W
- Number of Ethernet Ports
- Over 48 Ports
- Number of Downlink Ports
- 48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- N5K-C56128P
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- 24 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 48 fixed 10G Ethernet ports and 4 40G uplink ports
- Flash Memory
- 64 MB
- Switching Capacity
- 1280 Gbps
- Switching Capacity with Stacking
- 2560 Gbps
- Product Name
- Cisco Nexus 56128P Data Center Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 18 inches
- Weight
- 25 lbs
N5K-C56128P Use Case
Leaf-Spine Data Center Fabric Using N5K-C56128P Nexus 56128P 48×10G/4×40G
In a hyperscale data center, IT teams deploy the N5K-C56128P Nexus 56128P 2RU chassis with 48×10G SFP+ server ports and 4×40G QSFP+ uplinks as leaf switches. By integrating into a spine-leaf architecture, the chassis delivers non-blocking fabric, sub-microsecond latency for east-west traffic and a 1:1 oversubscription ratio. Benefit: predictable high throughput, linear scalability and simplified network operations for rapidly growing workloads.
Multi-Tenant Cloud Networking with Nexus 56128P 2RU Chassis 48×10G/4×40G
Service providers and enterprise cloud teams leverage the N5K-C56128P Nexus 56128P chassis to connect dense virtualization clusters using 48×10G SFP+ links and aggregate tenant traffic over 4×40G QSFP+ uplinks. With VRF-Lite, EVPN-VXLAN segmentation and Cisco NX-OS automation, administrators isolate tenant environments, enforce granular policies and accelerate on-boarding. Benefit: enhanced security, operational agility and rapid service provisioning in multi-tenant cloud infrastructures.
High-Performance Compute Cluster Networking on N5K-C56128P 48×10G/4×40G
In financial trading and scientific computing clusters, the N5K-C56128P Nexus 56128P provides 48×10G SFP+ server connections optimized for RDMA over Converged Ethernet (RoCE) and 4×40G QSFP+ spine uplinks. This design ensures lossless, low-latency interconnects for MPI workloads and real-time analytics. Benefit: accelerated compute cycles, reduced network bottlenecks and improved job turnaround times for time-sensitive applications.
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Product Comparison Table 
| N5K-C56128P |  N5K-C5672UP |  N5K-C5596T-FA |  N5K-C5548UP-FA |  N5K-C5672UP-16G | |
|---|---|---|---|---|---|
| Depth | 18 inches | 28 inches | 18 inches | 18.6 inches | 15 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 256 MB | 256 MB | 64 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | N5K-C56128P | N5K-C5672UP | N5K-C5596T-FA | N5K-C5548UP-FA | N5K-C5672UP-16G |
| Media Type Supported | Combo | Combo | Fiber | Combo | Combo |
| Memory | 256 MB | 4 GB | 512 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 48 Ports | 48 Ports | 48 Ports | 48 Ports | 16 Ports |
| Number of Ethernet Ports | Over 48 Ports | Over 48 Ports | Over 48 Ports | 24–48 Ports | 12–24 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply | Redundant Power Supply / AC Power Supply / N/A | Redundant Power Supply | Redundant Power Supply |
| Product Name | Cisco Nexus 56128P Data Center Switch | Cisco Nexus 5672UP Switch | Cisco Nexus 5596T Fabric Adapter | Cisco Nexus 5548UP Unified Port Switch | Cisco Nexus N5K-C5672UP-16G Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | Yes |
| SFP Ports | 24 SFP Ports | 24 SFP Ports | 24 SFP Ports | 4 SFP Ports | Combo |
| Switching Capacity | 1280 Gbps | 1280 Gbps | 960 Gbps | 640 Gbps | 320 Gbps |
| Uplink Configuration | 10G | 40G | 40G | 40G | 10G |
| Weight | 25 lbs | 20 lbs | 15 lbs | 24 lbs | 10 lbs |
| Width | 17.5 inches | 17.5 inches | 19 inches | 17.6 inches | 17.5 inches |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
F
Finley Barrett
5
High-density 48x10G ports provided excellent consolidation for our server farm.
G
Gideon Frost
5
QSFP+ uplinks delivered reliable 40G backbone connectivity.
H
Harvey Sutton
4
Cisco quality ensured consistent performance under heavy loads.
I
Isaac Mercer
5
Smooth deployment and easy management for large data centers.
J
Julian Drake
5
Professional-grade hardware, ideal for high-demand environments.
Questions & Answers
What is the Cisco Nexus 56128P chassis (SKU: N5K-C56128P)?
The Cisco Nexus 56128P is a 2-RU fixed chassis switch providing 48 x 10G SFP+ ports and 4 x 40G QSFP+ ports, designed for low-latency, high-density data center deployments.
How many 10G and 40G ports does the Nexus 56128P support?
The Nexus 56128P supports 48 front-panel 10G SFP+ ports and 4 front-panel 40G QSFP+ ports for flexible uplink or server connectivity.
What is the switching capacity of the Nexus 56128P?
It delivers up to 1.28 Tbps of switching capacity and 928 Mpps forwarding performance, ensuring line-rate throughput without oversubscription.
Which Cisco NX-OS software releases are supported on the Nexus 56128P?
The Nexus 56128P runs Cisco NX-OS versions 5.2(1) and later, offering advanced Layer 2/3 features, VXLAN, OTV, and comprehensive automation capabilities.
Does the Nexus 56128P support power redundancy?
Yes, it includes dual hot-swappable 770 W AC power supplies configured for N+1 redundancy, minimizing downtime during power module maintenance or failure.
What fan and cooling options are available?
It ships with five front-to-back hot-swappable variable-speed fans in an N+1 configuration, delivering efficient airflow and thermal management.
Which virtualization and fabric features are available?
The switch supports Virtual Device Contexts (VDC), Virtual PortChannel (vPC), VXLAN EVPN, Fabric Extenders (FEX), and Overlay Transport Virtualization (OTV) for multi-tenant segmentation and scaling.
How does the Nexus 56128P handle management and automation?
It offers Cisco NX-API REST, Python scripting, Chef, Puppet, and Ansible integration, plus out-of-band management via a dedicated 10/100/1000 management port.
What are the typical latency figures?
Latency is under 1 microsecond for 10G to 10G traffic and under 2 microseconds for 40G to 40G traffic, ensuring ultra-low delay for latency-sensitive applications.
What power and thermal specifications should I plan for?
Typical power consumption is 800 W (AC) under full load, with an operating temperature range of 0°C to 40°C and a maximum humidity of 85% non-condensing.
How do I upgrade uplinks from 40G to 100G?
You can upgrade uplinks by installing third-party 100G QSFP28 transceivers into the 40G QSFP+ slots, provided the connected NX-OS release supports 100G speeds.
What stacking or clustering options does it support?
The Nexus 56128P does not support traditional stacking but enables high-availability clustering through vPC and Layer 2 multipathing for seamless redundancy.
Can I deploy the Nexus 56128P in a multi-tenant environment?
Yes, with VXLAN EVPN, VDCs, VRFs, and role-based access control, the switch isolates tenants securely and scales overlays across the data center fabric.
What warranty and support are included?
Cisco provides a limited lifetime hardware warranty, 90 days of software updates, and complimentary 90-day Cisco SMARTnet™ for technical support; extended coverage is available.
How do I perform software upgrades safely?
Use the ISSU (In-Service Software Upgrade) feature to upgrade NX-OS images without traffic interruption, leveraging dual active supervisors in supported chassis.
Which rack units and power rails are required?
The Nexus 56128P occupies 2 RU in a standard 19-inch rack and requires two 20 A circuits per redundant power supply for full-load operation.