Chapter 2 Converting to an Integrated Switch System

Prerequisites for the Integrated Switch System

Prerequisites for the Integrated Switch System

Hardware Requirements

•Ensure that all fabric card chassis (FCCs) have two power shelves and that all three power entry modules (PEMs) in each power shelf are running correctly. During the conversion, when one 22-port SCGE is removed, the chassis must have both power shelves populated to keep all the fans in the chassis engaged.

•Two 22-port SCGE per fabric chassis.

•Four 22-port SCGE for a Two-FCC Multishelf System.

•Eight 22-port SCGE for a Four-FCC Multishelf System.

Software Requirements

•Cisco IOS XR Software Release 3.4.1 to support 22-port SCGE.

•ROMMON version 1.43 or higher

Caution Before performing the procedures that are described in this chapter, it is important to wait until the previous step is completed before attempting the next step. Failure to do so can result in a failure of the migration procedure. If a previous step fails to complete successfully, contact Cisco Technical Support before proceeding. We do not have a rollover procedure defined.

Cisco CRS-1 Multishelf Conversion to an Integrated Switch System Introduction

The first implementation of the Cisco CRS-1 Multishelf System, the interrack control network was established by connecting the GE ports on each LCCs route processor (RP) to two external

Cisco Catalyst 65xx switches, which, in turn, were connected to the FCCs’ shelf controller (SC) cards. Two Cisco Catalyst 65xx switches were used to achieve redundancy, and Rapid Spanning Tree Protocol (RSTP) was used to ensure a loop-free topology.

In the first release of the Cisco CRS-1 Multishelf System (running Cisco IOS XR Software

Release 3.2.50), two Cisco Catalyst 65xx switches are interconnected to the multishelf’s fabric card chassis (FCC0, FCC1, FCC2, and FCC3) and two line card chassis (LCC0 and LCC1) to form the interchassis control network.

The 22-port SCGE card replaces the current 2-port SCGE card in the multishelf system (MSS) FCC. The 22-port SCGE card contains built-in bundled Gigabit Ethernet (GE) switches. The 22-port SCGE card is designed to integrate the functionality of the two Cisco Catalyst 65xx switches. With the new 22-port SCGE card, all Layer 2 system switching is now bundled and integrated into the Cisco CRS-1 router. On the 22-port SCGE card, there are 22 ports available on the front panel. Each port on the 22-port SCGE card has two LEDs, which indicate port activity and link state.

When the 22-port SCGE cards are installed, the control network topology ceases to be a simple hub-and-spoke set of connections.

Cisco CRS-1 Carrier Routing System Multishelf System Upgrade and Conversion Guide

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Cisco Systems CRS-1 manual Prerequisites for the Integrated Switch System
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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.
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