Chapter 6 Route Processor; Route Processor Overview - Cisco CRS-1 System Description

Route Processor
This chapter describes the route processor (RP) card. The following sections are included:
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Route Processor Overview

The route processor (RP) card is the system controller for the Cisco CRS 4-slot line card chassis. It
performs route processing and distributes forwarding tables to the MSCs. Although the routing system
contains two RP cards, only one RP is active at a time. The other RP operates in standby mode, ready to
assume control if the primary RP fails.
The RP card provides route processing, alarm, fan, and power supply controller function in the Cisco
CRS 4-slot line card chassis. The RP card controls fans, alarms, and power supplies through the use of
an i2c communication link from the RP card to each fan tray/power supply.
Two RP cards are required per chassis for redundancy—one is primary, and the other is standby. An RP
card can be inserted in either of the two dedicated slots in the chassis.
Figure 6-1
OL-10805-10
Route Processor Overview, page 6-1
Primary and Standby Arbitration, page 6-4
RP Card to Fabric Module Queuing, page 6-4
illustrates the route processor card.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
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