Ruijie RG-N18000 Series Core Switch Guide (2026)

The Ruijie RG-N18000 Series is a family of modular high-performance switches designed for the data center and large campus core. Built on the Newton platform, the RG-N18000-X series forms the backbone of cloud-architected networks with its zero-backplane design, CLOS orthogonal architecture, and switching capacity of up to 461T per chassis. With 100G and 400G connectivity, N+M power redundancy, and modular line cards, it offers a scalable core.

What is the Ruijie RG-N18000?

The Ruijie RG-N18000 Series is a family of modular chassis-type switches based on Ruijie's Newton platform, designed for the data center and large campus core. With high switching capacity, modular line cards, and high-speed connectivity, it takes on the highest-traffic layer of the network.

The core switch is the heart of the enterprise or data center network: it interconnects all distribution-layer switches and carries enormous volumes of traffic without latency. A bottleneck or fault at this layer affects the entire network; for this reason, capacity, redundancy, and reliability in the core switch must be at the highest level.

The RG-N18000-X series meets these requirements with a modular chassis architecture. The chassis houses different line cards; as needs grow, capacity is expanded by adding new cards. This allows for gradual scaling without a large upfront investment. Sora Yazılım designs the core layer holistically together with RG-NBS distribution switches.

For details on the product family, you can review our Ruijie RG-N18000 core switch product page. Sora Yazılım provides support from site survey to deployment in data center and campus core design.

The core layer is the part of the network with the highest uptime expectation; it generally operates with downtime targets measured in minutes per year. For this reason, in the RG-N18000 series, every critical component (supervisor, fabric, power, fan) is redundant and automatic takeover is provided in the event of a fault. This design philosophy prevents the failure of a single component from halting service.

Architecture: zero-backplane and CLOS

The RG-N18000-X series uses a zero-backplane design for the first time among switches with 100T switching capacity. The line cards and fabric engines connect directly, without a backplane connection; the CLOS orthogonal architecture, meanwhile, provides switching capacity of up to 461T per chassis.

In traditional chassis switches, line cards communicate over a backplane; at high speeds, this can create a bottleneck and a reliability risk. The zero-backplane design increases signal integrity by eliminating this intermediate layer and makes it possible to scale to higher speeds. This is a critical advantage, especially in the transition to 400G and beyond.

The CLOS orthogonal architecture provides the shortest and most efficient signal path by placing the line cards and fabric cards perpendicular (orthogonal) to one another. This design makes both high capacity and low latency possible; it efficiently carries the intense east-west (server-to-server) traffic that cloud data centers require.

The large-buffer design prevents packet loss during sudden traffic bursts (microbursts). Workloads such as AI training, big data processing, and storage traffic produce short-lived but very high traffic surges; insufficient buffering drops packets during these surges, seriously affecting performance. The RG-N18000's high buffer capacity maintains stability in these scenarios.

Chassis models

The RG-N18000-X series offers chassis models with different slot counts: the 6-slot RG-N18006-X, the 10-slot RG-N18010-X, and the 18-slot RG-N18018-X. The slot count determines the number of line cards that can be housed and therefore the total port capacity.

The RG-N18018-X offers two supervisor slots, 16 service module slots, and six fabric module slots. This separation enables the management, port, and switching functions to be independently redundant and scalable. The RG-N18010-X, meanwhile, is 12U high and supports up to 288 100GE lines, making it ideal for large campuses and mid-sized data centers.

Model selection is made according to the current port requirement and future growth. Thanks to the modular structure, a chassis can be partially populated initially and expanded over time with new line cards; this optimizes capital investment by spreading it out over the need.

Line cards support different port types: from high-density 10GE/25GE access cards to 100GE and 400GE high-speed uplink cards. This variety makes it possible to house both server connections and backbone connections within the same chassis. This way, a single core platform flexibly meets different connectivity needs.

The role in data center and large campus

The RG-N18000 series is positioned as the core layer in environments requiring the highest capacity and reliability, such as internet data centers, large university campuses, public data centers, and carrier networks.

In data centers, most traffic flows between servers (east-west); virtualization, containerization, and distributed applications multiply this traffic. The core switch must carry this intense internal traffic without latency or loss. The RG-N18000's high capacity and low-latency architecture are designed precisely to meet this need.

In large campuses, meanwhile, the core switch interconnects dozens of distribution switches and manages the entire campus's internet and data center traffic. High availability is essential here: an outage in the core affects thousands of users simultaneously. For this reason, the core is always designed to be redundant.

Redundancy is generally achieved by having two core switches work together; with virtualization technologies, two physical switches can be managed as a single logical device. This approach both simplifies management and guarantees uninterrupted network operation even if one switch goes completely offline. The distribution layer connects to these two cores with redundant links.

Power, cooling, and redundancy

The RG-N18000-X series offers a large number of power supply slots for N+M power redundancy and provides highly efficient cooling with a front-to-rear airflow design. This is compatible with the hot/cold aisle layout of the data center.

The core switch must operate continuously; for this reason, power and cooling redundancy are critical. N+M redundancy ensures that the system continues to operate even if one or more power supplies fail. Power supplies and fans are hot-swappable, so maintenance does not require downtime.

Front-to-rear airflow is compatible with the hot aisle/cold aisle architecture of modern data centers and makes heat dissipation efficient. Fewer, lower-speed fans reduce both energy consumption and noise. These design details directly affect operating costs in large-scale deployments.

At data center scale, energy efficiency is an important component of total cost of ownership. A high-density core switch draws significant power; efficient cooling and low-speed fans reduce both electricity and cooling infrastructure costs. Power and cooling planning must be addressed from the outset together with the core switch selection.

The backbone role and connectivity to distribution

As the core layer, the RG-N18000 interconnects distribution switches with high-speed 100G/400G connections. The access and distribution layers are generally built with RG-NBS enterprise switches and connect to the core with redundant uplinks.

In a layered architecture, the capacity of each layer must be compatible with the one above it. The core must have the capacity to carry the traffic aggregated by the entire distribution layer; otherwise, even the fastest access and distribution layer is affected by the bottleneck in the core. The RG-N18000's high capacity is designed to eliminate this bottleneck in large networks. For holistic design, the access, distribution, and core layers must be planned together.

In modern data centers, in addition to the traditional three-layer model, the spine-leaf architecture is also common. In this design, each leaf switch connects to each spine switch; this way, the distance between any two servers becomes fixed and predictable. High-capacity switches such as the RG-N18000 take on the spine role in this architecture, supporting horizontal scaling.

Management and scalability

The RG-N18000 series is managed with enterprise network management tools and Ruijie's cloud architecture approach. The modular structure provides scalability at the hardware level, while automation and central monitoring increase operational efficiency.

Managing large-scale core switches is different from managing an ordinary device: high availability, uninterrupted software updates, and detailed telemetry are required. With central monitoring, port utilization, traffic patterns, and health metrics are continuously tracked. For fleet-wide visibility, you can review our Ruijie Cloud guide.

Modern core switches offer APIs and telemetry streams for automation and programmability. This enables the network to be managed with software-defined tools and real-time state data to be transferred to central systems. In large, dynamic environments, automation rather than manual configuration becomes decisive in terms of both speed and consistency.

The core switch is a strategic investment with a long life cycle; it generally serves for five years or longer. For this reason, the selection must be made not only for today's need but also in preparation for future growth and technology transitions (for example, to 400G). The modular architecture makes gradual upgrades possible throughout this long life, protecting the investment.

Frequently Asked Questions

What is the Ruijie RG-N18000?

It is a family of modular high-performance chassis switches designed for the data center and large campus core. It is based on the Newton platform; with its zero-backplane design and CLOS architecture, it offers capacity of up to 461T per chassis.

What advantage does the zero-backplane design provide?

It removes the backplane intermediate layer between the line cards and fabric engines; this increases signal integrity and facilitates scaling to high speeds of 400G and beyond.

Which chassis models are available?

The 6-slot RG-N18006-X, the 10-slot RG-N18010-X, and the 18-slot RG-N18018-X models are available. The slot count determines the total port and switching capacity.

Where is the RG-N18000 used?

It is used in core layers requiring the highest capacity and reliability, such as internet data centers, large campuses, public data centers, and carrier networks.

How is power redundancy provided?

It offers a large number of power supply slots with N+M power redundancy; the system continues to operate even if one or more supplies fail. The power supplies are hot-swappable.

How does it integrate with the distribution layer?

The RG-N18000 core connects distribution switches such as the RG-NBS with 100G/400G redundant uplinks; in a layered architecture, each layer is designed with a capacity compatible with the one above it.

Conclusion

The Ruijie RG-N18000 Series offers a high-performance, scalable, and redundant solution for the data center and large campus core with its zero-backplane design, CLOS architecture, and capacity of up to 461T. The modular chassis structure makes gradual growth possible, while N+M power redundancy and efficient cooling support uninterrupted operation.

To properly size your data center or large campus core in terms of capacity, redundancy, and scale, you can hold a free discovery meeting with the Sora Yazılım team.