Chapter 5 Line Cards, Physical Layer Interface Modules, And Shared Port Adapters Overview; Line Cards And Plims Overview - Cisco CRS-1 System Description

Carrier routing system 4-slot line card chassis

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Line Cards, Physical Layer Interface Modules,

and Shared Port Adapters Overview

This chapter describes the modular services cards (MSCs), forwarding processor (FP), label switch

processor (LSP), and associated physical layer interface modules (PLIMs). This chapter also describes

the optional use of shared port adapters (SPAs). The cable-management system is also described.

This chapter includes the following sections:

•

The MSC, FP, and LSP card, also called line cards, are the Layer 3 forwarding engine in the CRS 8-slot

routing system. Each line card is paired with a corresponding physical layer interface module (PLIM)

that contains the packet interfaces for the line card. A line card can be paired with different types of

PLIMs to provide a variety of packet interfaces, such as OC-192 POS and OC-48 POS.

There are three versions of the MSC card: CRS-MSC, CRS-MSC-B, and CRS-MSC-140G.

There are two versions of the FP card: CRS-FP40 and CRS-FP-140.

There is one LSP card: CSR-LSP.

See the

Note

and PLIM component compatibility.

Each line card and associated PLIM implement Layer 1 through Layer 3 functionality that consists of

physical layer framers and optics, MAC framing and access control, and packet lookup and forwarding

capability. The line cards deliver line-rate performance (up to 140 Gbps aggregate bandwidth).

Additional services, such as class of service (CoS) processing, multicast, traffic engineering (TE),

including statistics gathering, are also performed at the 140-Gbps line rate.

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Line Cards and PLIMs Overview, page 5-1

Line Card Descriptions, page 5-6

Physical Layer Interface Modules, page 5-9

Chassis Cable Management, page 5-11

SPA Interface Processors and Shared Port Adapters, page 5-11

"CRS Hardware Compatibility" section on page 1-8

Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description

C H A P T E R

for information about CRS fabric, line card,

5-1

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