Supplemental Bonding and Grounding | Cisco Systems CRS-1 specs

Chapter 2 Power and Cooling

Supplemental Bonding and Grounding

The 8-slot line card chassis has a safety earth ground connection as part of the power cabling to the PDUs. The chassis also has supplemental bonding and grounding points (two threaded ground inserts) that you can use to connect the router to the central office ground system or interior equipment grounding system. Also referred to as the network equipment building system (NEBS) bonding and grounding stud, these grounding points are located at the rear (MSC side) of the chassis (see Figure 2-8).

Note The NEBS bonding and grounding points are intended to satisfy the Telcordia NEBS requirements for supplemental bonding and grounding connections. If you are not installing the router in a NEBS environment, you can skip these guidelines and rely on the safety earth ground connection for the PDUs.

Figure 2-8 NEBS Bonding and Grounding Points (Rear of Chassis)

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NEBS bonding and grounding points

To connect the chassis to a supplemental ground connection, you must have the following:

•A grounding lug that has two M6 bolt holes with 0.625- to 0.75-inch (15.86- to 19.05-mm) spacing between them, and a wire receptacle large enough to accept a 6-AWG or larger multistrand copper wire. The lug is not available from Cisco Systems; it is available from electrical-connector vendors.

•Two M6 or equivalent hex-head bolts with locking washers and nuts (nickel-plated brass is ideal). These bolts, locking washers, and nuts are not available from Cisco Systems; they are available from any commercial hardware vendor.

•A grounding wire. Although we recommend at least 6-AWG multistrand copper wire, the actual wire diameter and length depend on your router location and site environment. This wire is not available from Cisco Systems; it is available from any commercial cable vendor.

Caution The DC Return of the Cisco CRS-1 8-slot chassis should remain isolated from the system frame and chassis (DC-I: Isolated DC Return).

For additional information about NEBS, see Cisco CRS-1 Carrier Routing System Regulatory

Compliance and Safety Information.

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

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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.