C H A P T E R 2

Power and Cooling

This chapter describes the Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis power and cooling systems. It also provides the power and grounding and cooling requirements for the installation site to help you plan the site facilities for the system. The Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis System Description provides detailed information about these components.

This chapter contains the following sections:

Chassis Power System

General Power and Grounding Requirements

DC Power Requirements

AC Power Requirements

Supplemental Bonding and Grounding

Chassis Airflow

Facility Cooling Requirements

Chassis Power System

The 8-slot line card chassis can be either DC or AC powered. Each type of power system (DC or AC) provides power to chassis components. The chassis power system is made up of two input power distribution units (PDUs) and two power modules, one in each PDU. Each PDU is connected to a different power source. Input power enters the PDU and is passed to the power module, which provides 7,500 watts of power to the components in the chassis. Each power module has its own circuit breaker.

The Cisco CRS-1 8-slot line card chassis uses the AC power PDUs to provide the two types of AC wiring schemes (Wye and Delta). Each chassis has two PDUs, and each PDU takes one supply which, in the case of AC, has three internal zones such that two three-zone power supplies provide three redundant power zones (see the Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis System Description for more information).

Because each PDU is connected to a separate and independent power source, the power system provides 2N power redundancy. During normal operation when both power sources are operational, both sets of PDUs and power modules function together to power the chassis. However, if a power sources fails, the other power source provides the other PDU and power module with enough input power to power the chassis. This 2N power redundancy enables the routing system to operate despite the power failure.

Chassis input power requirements are as follows:

A DC-powered chassis requires 8,000 watts of DC input power.

Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

 

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Cisco Systems CRS-1 manual Power and Cooling, Chassis Power System

CRS-1 specifications

Cisco Systems' Carrier Routing System (CRS-1) is a cutting-edge, high-capacity router designed to meet the demands of service providers and large enterprises. Introduced in the early 2000s, the CRS-1 represents a significant leap forward in routing technology, offering unparalleled performance, scalability, and reliability.

One of the primary features of the CRS-1 is its exceptional scalability. The system is built on a modular architecture that allows for easy upgrades and expansions. This enables service providers to start with a configuration that suits their immediate needs while having the flexibility to expand as traffic demands grow. The CRS-1 supports a wide range of line cards, enabling data, voice, and video to be managed on a single platform, which simplifies network management and reduces operating costs.

The CRS-1 leverages advanced technologies that enable it to deliver impressive performance. With the ability to handle up to 92 terabits per second of throughput, the router is capable of supporting a vast number of connections, making it well-suited for large-scale service providers and data centers. This level of performance is powered by Cisco’s proprietary silicon technology, which optimizes the packet forwarding process and enhances overall efficiency.

Another key characteristic of the CRS-1 is its strong focus on reliability and redundancy. The system is designed with high availability in mind, ensuring that it can continue to operate seamlessly even in the event of hardware failures. Redundant components, such as power supplies and route processors, allow the CRS-1 to maintain its performance and uptime, a critical requirement for mission-critical network operations.

Additionally, the CRS-1 supports a wide variety of protocols and technologies, including Internet Protocol (IP), Multiprotocol Label Switching (MPLS), and various service provider features. This versatility makes it a compelling choice for organizations looking to implement advanced networking capabilities, such as Quality of Service (QoS) and traffic engineering.

In summary, the Cisco Systems CRS-1 stands out as a formidable solution for modern routing needs. Its modular design, exceptional scalability, robust performance, reliability, and support for multiple protocols and services make it an ideal choice for service providers and enterprises seeking to future-proof their networks. As the demand for bandwidth continues to surge, the CRS-1 remains a pivotal component in the evolution of networking infrastructure.