Cisco Systems UBR7100E manual Front, Memory Type Size Quantity Description Location

Chapter 1 Product Overview

Functional Overview

•Four environmental sensors—Monitor the cooling air as it leaves the chassis.

•Boot ROM—Stores sufficient code for booting the Cisco IOS software.

•Flash memory single in-line memory module (SIMM)—Stores the boot image used to boot the router.

•NVRAM onboard flash memory—Stores the system configuration and environmental monitoring logs. (The NVRAM uses lithium batteries to maintain its contents when disconnected from power.)

Figure 1-6 Network Processor Card

Back		Environmental		Front
		sensor
				Polarization
			notch alignment
				SDRAM
				DIMM 1
				SDRAM
				DIMM 2
				Environmental
				sensor
				Environmental
				sensor
				SDRAM DIMM 0
				(always 64 MB)
				37852
Environmental	NVRAM	Polarization		Flash memory
sensor		notch alignment	Boot ROM	SIMM

Table 1-4describes the memory types.

Table 1-4 Network Processor Memory, Cashe, and Flask Disk Information

Memory Type		Size	Quantity	Description	Location
SDRAM packet		64 MB	1 fixed	Fixed at 64 MB DIMM at the factory	DIMM 0 = U16
memory			SDRAM slot
SDRAM system		128 to 256 MB	2 configurable	64 or 128-MB DIMMs (based on maximum	DIMM 1 = U13
memory			SDRAM slots	SDRAM required)	DIMM 2 = U14
Boot ROM		512 KB	1	OTP1 ROM for the ROM monitor program	Socket U21
Flash memory		8 MB	1	Contains the default boot helper image	Flash SIMM
SIMM					socket P2
NVRAM		128 KB	1	Nonvolatile EPROM for the system	U69
				configuration file
	Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
1-16					OL-5916-01