Cisco Systems Cisco XR 12416 manual PRP Memory Components, Type Size Quantity Description Location

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Chapter 1 Product Overview

Route Processor

PRP Memory Components

This section describes various types of memory used on the PRP to support router functions. Table 1-1provides a quick reference of the different types of memory, and Figure 1-14shows the location on the PRP board.

Table 1-1	PRP Memory Components

Type	Size	Quantity	Description	Location

SDRAM	512 MB1,	1 or 2	Uses 512 MB or 1 GB DIMMs (based on	U15 (bank 1)
	1 GB, or 2 GB		SDRAM configuration) for main	U18 (bank 2)
			Cisco IOS XR software functions

SRAM	2 MB (fixed)	—	Secondary CPU cache memory functions	—

NVRAM	2 MB (fixed)	—	System configuration files, register settings,	—
			and logs

Flash	64 MB SIMM	1	Cisco IOS XR boot image (bootflash), crash	P3
memory			information, and other user-defined files

Flash disk	64 MB1	1 or 2	Cisco IOS XR software images, system	Flash memory
(PCMCIA)			configuration files, and other user-defined	card slot 0 and
			files on one or two Flash memory cards	slot 1

Flash boot	512 KB	1	Flash EPROM for the ROM monitor program	—
ROM			boot image

1. Default shipping configuration.

	Cisco XR 12416 Router Installation Guide
1-26	OL-13833-01

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Contents Product Overview Physical and Functional Description of RouterCisco XR 12416 Router Installation Guide Air filter door Switch fabric Card cage Power shelf and power supplies Upper blower moduleAlarm card Upper card cage Alarm card Lower card cageAC and DC Power Subsystems Standard AC Power ShelfStandard AC-Input Power Subsystem Power cord Retention clipOptional AC Power Shelf Optional AC-Input Power Subsystem Optional Power Shelf AC-Input Connections Power cordsFault Temp AC Power SuppliesDC Power Shelf DC-Input Power Shelf A1- A1+ A2- A2+ B2+ B2- B1+ B1 Ground DC Power Supplies 9identifies the components of a 2400 W DC power supplyChassis Card Cages Upper Card CageSwitch Fabric Card Cage Lower Card CageSwitch Fabric Overview Switch Fabric Card FunctionalitySwitch Fabric Cards Clock Scheduler CardsAlarm Card and Line Card Overview Alarm CardsPin Audio alarm Cutoff switchRoute Processor Line CardsCisco XR 12416 Router Installation Guide Performance Route Processor Overview PRP Pcmcia Card Slots and Status LEDsPRP Ethernet Ports and Status LEDs 12 Port Activity LEDs-Partial Front PanelPRP Reset Switch PRP Auxiliary and Console PortsPRP Alphanumeric Message Displays ProcessorPRP Memory Components Type Size Quantity Description LocationPcmcia slot-1 Slot-2 Behind cover U18 Bank Flash Dram DIMMsU15 PRP Sdram PRP Nvram PRP Flash MemoryBlower Module Upper and Lower Cable Management BracketsBlower Module Top blower module Air exhaust Plenum Air filter Room airProduct Overview Blower Module OL-13833-01