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by Cisco
Product Line: Cisco Nexus
Product Type: Switch
Original price $797.00 - Original price $4,135.00
Original price
$797.00 - $4,135.00
Current price $4,135.00
Title: Surplus

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Product Description

The N5K-C56128P Cisco switch features 48 fixed 1 and 10 GbE SFP+ ports, 4 40 Gbps QSFP+ ports, and 2 slots for expansion modules, supporting a diverse range of high-speed connectivity options. It offers a Layer 2 hardware forwarding rate of 2.56 Tbps and Layer 3 forwarding at 1904 Mpps, coupled with a low latency of approximately 1 microsecond, ensuring swift data processing and transmission. The device supports up to 256,000 MAC addresses and ARP entries, up to 4096 VLANs, and includes a 25 MB buffer, providing ample capacity for large-scale network deployments.

Key Feature for the N5K-C56128P

  • What is the number of 1 and 10 GbE SFP+ ports available?
    There are 48 fixed 1 and 10 GbE SFP+ ports.
  • How many 40 Gbps QSFP+ ports does the device feature?
    The device features 4 40 Gbps QSFP+ ports.
  • Can you add additional modules to this device?
    Yes, it has 2 slots for expansion modules.
  • What is the Layer 2 and Layer 3 hardware forwarding capacity?
    Layer 2 hardware forwarding is 2.56 Tbps and Layer 3 hardware forwarding is 1904 Mpps.
  • How many MAC addresses and ARP entries can the device support?
    It can support up to 256,000 combined MAC addresses and ARP entries.
  • What is the approximate latency of the device?
    The approximate latency is 1 microsecond.
  • What is the buffer size of the networking hardware?
    The buffer size is 25 MB.
  • How many IPv4 and IPv6 host prefixes does the device support?
    It supports 32,000 IPv4 host prefixes and 8,000 IPv6 host prefixes.
  • What are the IGMP Snooping Groups and IPv4 Multicast Routes capacity?
    Both IGMP Snooping Groups and IPv4 Multicast Routes can support up to 8000 entries.
  • How many VLANs can be configured on this device?
    Up to 4096 VLANs can be configured.

Product Review

The Cisco N5K-C56128P offers a substantial number of fixed 1 and 10 GbE SFP+ ports (48) and 40 Gbps QSFP+ ports (4), along with two slots for expansion modules, making it highly adaptable for diverse networking needs. Its Layer 2 and Layer 3 hardware forwarding capacities are impressive at 2.56 Tbps and 1904 Mpps, respectively, ensuring efficient data handling. However, the operational temperature range is limited to 0°C to 40°C, which might restrict deployment in environments with extreme temperatures.


The Cisco N5K-C56128P is a high-capacity, low-latency network switch designed to meet the demands of modern data centers and high-performance computing environments. It combines scalability with powerful networking capabilities to support a wide range of applications and services. At the heart of the Cisco N5K-C56128P are its connectivity options, which include 48 fixed 1 and 10 GbE SFP+ ports, providing a versatile foundation for both 1 Gbps and 10 Gbps connections. Additionally, the switch features 4 40 Gbps QSFP+ ports, enhancing its capability to handle high-bandwidth connections and allowing for high-density configurations that can support up to 40 Gbps of data throughput. To accommodate future growth and technological advancements, the Cisco N5K-C56128P is equipped with 2 slots for expansion modules. This flexibility ensures that the switch can adapt to changing network requirements and technologies, providing a scalable solution for expanding data center networks. The switch boasts a Layer 2 hardware forwarding rate of 2.56 Tbps and a Layer 3 hardware forwarding rate of 1904 Mpps, enabling it to efficiently manage large volumes of data traffic. With a latency of approximately 1 microsecond, the Cisco N5K-C56128P ensures minimal delay, crucial for applications requiring real-time data processing. In terms of network management and security, the Cisco N5K-C56128P supports up to 256,000 combined MAC addresses and ARP entries, offering extensive connectivity options for a multitude of devices. The switch also provides a comprehensive set of IPv4 and IPv6 host prefixes, multicast routes, and IGMP snooping groups, alongside flexible ACL entries for granular access control and security measures.
  • Buffer size of 25 MB to handle sudden bursts of data and ensure smooth data transmission.
  • Support for up to 4096 VLANs, allowing for extensive network segmentation and improved network efficiency and security.
  • Environmental specifications include an operating temperature range from 0 °C to 40 °C and storage temperature range from -40 °C to 70 °C, with humidity tolerance from 5% to 95% (noncondensing), ensuring reliable operation in a wide range of conditions.
The switch's physical dimensions are practical for data center deployment, with a height of 3.5 inches, a width of 17.3 inches, and a depth of 30 inches. These dimensions, combined with its comprehensive connectivity and network features, make the Cisco N5K-C56128P an ideal solution for organizations looking to build or expand their network infrastructure. Lastly, the switch's support for up to 4000 VRF entries and its provision for both unicast and multicast queues per port (8 each) further underline its capabilities in handling diverse network traffic patterns efficiently. This ensures that the Cisco N5K-C56128P can accommodate a variety of network designs and traffic types, making it a versatile choice for modern networking environments.


Part NumberCisco N5K-C56128P
Fixed 1G and 10G SFP+ Ports48
40G QSFP+ Ports4
Expansion Module Slots2
Layer 2 Switching Capacity2.56 Terabits per second
Layer 3 Switching Capacity1.904 Billion packets per second
MAC and ARP Entries CapacityUp to 256,000
Network Latency~1 microsecond
Memory Buffer25 Megabytes
IPv4 Addresses for Hosts32,000
IPv6 Addresses for Hosts8,000
IPv4 Multicast Routing PathsUp to 8,000
IGMP GroupsUp to 8,000
Virtual Routing and Forwarding (VRF) Instances4,000
Supported VLANsUp to 4,096
Access Control List (ACL) Entries4,000
Unicast Queue Count per Port8
Multicast Queue Count per Port8
Unit Height3.5 inches
Unit Width17.3 inches
Unit Depth30 inches
Operational Temperature Range Low0 °C
Operational Temperature Range High40 °C
Storage Temperature Range Low-40 °C
Storage Temperature Range High70 °C
Operational Humidity Range5% to 95%, non-condensing

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