Bridge/Router Installation Guide

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Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide

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Chapter 4 Installing and Removing SFCs, RPs, MSCs, PLIMs, and Associated Components

How to Install or Remove a Modular Services Card

This section contains the following procedures:

• Installing an MSC

• Removing an MSC

• Verifying the Installation of an MSC

Installing an MSC

This section describes how to install a modular services card (MSC) in the Cisco CRS-1 4-slot line card

chassis. For more detailed information on the MSC, see Cisco CRS-1 Carrier Routing System 4-Slot Line

Card Chassis System Description.

The MSC is a Layer 3 forwarding engine in the Cisco CRS-1 routing system (see Figure 4-21).

There are two versions of the MSC: the original version (CRS-MSC) and version B (CRS-MSC-B). Both

versions provide the same functionality.

An MSC can be paired with different types of physical layer interface modules (PLIMs) to provide a

variety of interfaces.

An MSC fits into any available MSC slot in the front of the chassis and connects directly to the midplane.

There are four MSC slots, with two on the left side (MSC slot

0 and MSC slot 1) and two on the right

side (MSC slot

2and MSC slot 3) (see Figure 4-17 on page 4-25).

Note If your Cisco CRS-1 4-slot line card chassis uses a Cisco CRS-1 SIP-800, refer to the “Installing and

Removing a SIP” chapter in the Cisco CRS-1 SIP and SPA Hardware Installation Guide on