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by Cisco
Product Line: Cisco NCS 5500 Series
Product Type: Fixed Chassis
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Title: Surplus

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Product Description

The NCS-55A1-36H-S features a high-capacity design with 144 ports supporting 10GE/25GE speeds and 36 ports for 40GE/100GE connectivity, powered by a 8-Core X86 CPU at 1.6GHz and runs on Cisco IOS-XR 64-Bit Software. It is equipped with 32 GB of system memory and a 128 GB SSD, achieving system throughput of up to 3.6 Tbps with full line rate MACsec encryption across all 36 100G ports. The device supports up to 1M FIB entries, offers 1+1 power supply redundancy, and includes features such as hot-swap support for power supplies and fan trays, encapsulated in a 1 RU form factor.

FAQs for the NCS-55A1-36H-S

  • What is the total number of ports available for 10GE/25GE and 40GE/100GE speeds?
    There are 144 ports for 10GE/25GE speeds and 36 ports for 40GE/100GE speeds.
  • Which software does it operate on?
    It operates on the Cisco IOS-XR 64-Bit Software.
  • Can you detail the CPU specifications?
    The unit is equipped with an 8-Core X86 CPU operating at 1.6GHz.
  • How many management ports are included, and what type are they?
    There are 2 management ports, both of which are RJ-45 type.
  • What are the memory and storage capacities?
    The system has 32 GB of memory and a 128 GB SSD for storage.
  • What is the system's throughput capability?
    The system can achieve throughput up to 3.6 Tbps.
  • Is MACsec encryption supported across all ports?
    Yes, MACsec encryption is supported at full line rate across all 36 100G ports.
  • What are the power supply specifications?
    The device has two power supplies, offering 1+1 redundancy, with a typical output of 1100 W and a maximum output of 1450 W.
  • Does the device support hot-swapping of power supplies and fan trays?
    Yes, both power supplies and fan trays support hot-swapping.
  • What are the physical dimensions and environmental operating conditions?
    The form factor is 1 RU, measuring 1.72 in. in height, 17.3 in. in width, and 30 in. in depth. It operates between 0 °C and 40 °C with a humidity range of 5% to 95% (non-condensing).

Product Review

The CISCO NCS-55A1-36H-S stands out for its high system throughput of up to 3.6 Tbps and the ability to support up to 1M FIB entries, catering efficiently to high-demand network environments. With 144 ports for 10GE/25GE and 36 ports for 40GE/100GE speeds, it offers extensive connectivity options, though the reliance on a single CPU model may limit processing power scalability. Additionally, the inclusion of redundant power supplies and hot-swap support for power supplies and fan trays enhances system reliability and maintenance ease, but the form factor and weight could pose challenges in space-constrained installations.


The CISCO NCS-55A1-36H-S is a high-performance, 1 rack unit (RU) networking device designed to meet the demands of modern data centers and large-scale enterprise networks. This device is engineered to provide exceptional throughput, scalability, and security features, making it a pivotal component for managing extensive network infrastructures. At the core of the CISCO NCS-55A1-36H-S is an 8-core X86 CPU running at 1.6GHz, paired with 32 GB of system memory and a 128 GB solid-state drive (SSD) for storage. This powerful combination ensures smooth operation and efficient handling of network management and routing tasks. The device operates on Cisco IOS-XR 64-Bit Software, known for its scalability, robustness, and comprehensive feature set. Key hardware specifications include: - The device supports an impressive system throughput of up to 3.6 terabits per second (Tbps), enabling high-speed data transfers and handling of extensive network traffic without bottlenecks. - It features 144 ports with 10GE/25GE speed and 36 ports with 40GE/100GE speed, providing flexible connectivity options and the ability to support a wide range of network architectures and bandwidth requirements. - MACsec encryption is supported at full line rate across all 36 100G ports, ensuring secure data transmission and protection against threats. Additional technical details are as follows:
  • Route scale is capable of handling up to 1 million Forwarding Information Base (FIB) entries, allowing for efficient routing and scalability.
  • The device includes two management ports (RJ-45 type) for simplified network management and monitoring.
  • It offers power supply redundancy (1+1) and includes three fan trays for optimal cooling, both of which support hot-swapping for uninterrupted operation and maintenance.
The CISCO NCS-55A1-36H-S is designed with a form factor of 1 RU, measuring 1.72 inches in height, 17.3 inches in width, and 30 inches in depth, weighing 14.97 pounds. This compact size makes it suitable for space-constrained environments while still delivering high-density networking capabilities. In terms of power, the device has a typical output power of 1100 W and can go up to a maximum output power of 1450 W. It operates within a temperature range of 0 °C to 40 °C and can be stored in temperatures ranging from -40 °C to 70 °C. The operating humidity range is from 5% to 95% (non-condensing), ensuring reliable performance under various environmental conditions. In conclusion, the CISCO NCS-55A1-36H-S is a state-of-the-art networking device that combines high-speed connectivity, advanced security features, and powerful processing capabilities. Its extensive port density, high system throughput, and robust security measures make it an ideal choice for organizations looking to build or upgrade their network infrastructure to support current and future demands.


Part Number and ManufacturerCISCO NCS-55A1-36H-S
10GE/25GE Ports Count144
40GE/100GE Ports Count36
Operating SystemCisco IOS-XR 64-Bit
Processor8-Core X86 at 1.6GHz
Management Ports Quantity2
Type of Management PortsRJ-45
Main Memory32 GB
Storage (SSD)128 GB
Maximum Throughput3.6 Tbps
MACsec SupportFull Line Rate (36 100G Ports)
Routing CapacityUp To 1M FIB Entries
Power Units Included2
Redundancy in Power Supply1+1
Fan Modules Count3
Support for Hot-SwappingYes (Power Supplies and Fan Trays)
Standard Power Output1100 W
Peak Power Output1450 W
Chassis Design1 RU
Unit Height1.72 in.
Unit Width17.3 in.
Unit Depth30 in.
Device Weight14.97 lbs.
Operational Temperature Range0 °C to 40 °C
Temperature Range for Storage-40 °C to 70 °C
Humidity Range for Operation5% to 95% (Noncondensing)

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