Cisco Systems XR 12404 manual Route Processor

Chapter 1 Cisco XR 12404 Router Overview

Route Processor

•AC power entry module (PEM)—A customized and hot-swappable one-piece unit. See the “Power Entry Modules” section on page 1-17for information.

•DC power entry module (PEM) and DC power distribution unit (PDU)—Two pieces that can be removed as one unit or in separate pieces. See the “Power Entry Modules” section on page 1-17for information.

Note When operating the router, both power module bays must have DC PEMs and DC PDUs installed to ensure EMI compliance.

•Fan tray assembly—Supplies cooling air to the router. See the “Fan Tray Assembly” section on page 1-20for information.

•Cable management bracket used to neatly route line card cables. See the “Cable Management System” section on page 1-22for information.

•Maintenance Bus—Controls all of the MBus modules in the system. See the “Maintenance Bus” section on page 1-24for information.

Route Processor

The route processor for the Cisco XR 12404 router is the Performance Route Processor (PRP-2). For detailed information about the PRP-2, refer to the Cisco document, Performance Route Processor Installation and Configuration Guide.

The PRP-2 performs the following primary functions:

•Executes routing protocol stacks

•Performs all protocol communications with other routers

•Builds and distributes forwarding information to all line cards

•Uploads the operating system software images to all installed line cards during power-on

•Provides out-of-band system console and auxiliary ports and an Ethernet port for router configuration and maintenance

•Monitors and manages the power and temperature of system components such as line cards, power supplies, and fans

	Cisco XR 12404 Router Installation Guide
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