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Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
OL-5916-01
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
Table 1-4 describes the memory types.
NVRAM Polarization
notch alignment
Environmental
sensor
Flash memory
SIMM
Boot ROM
Polarization
notch alignment
Environmental
sensor
FrontBack
Environmental
sensor
Environmental
sensor
SDRAM
DIMM 2
SDRAM DIMM 0
(always 64 MB)
SDRAM
DIMM 1
37852
Table 1-4 Network Processor Memory, Cashe, and Flask Disk Information
Memory Type Size Quantity Description Location
SDRAM packet
memory
64 MB 1 fixed
SDRAM slot
Fixed at 64 MB DIMM at the factory DIMM 0 = U16
SDRAM system
memory
128 to 256 MB 2 configurable
SDRAM slots
64 or 128-MB DIMMs (based on maximum
SDRAM required)
DIMM 1 = U13
DIMM 2 = U14
Boot ROM 512 KB 1 OTP
1
ROM for the ROM monitor program Socket U21
Flash memory
SIMM
8 MB 1 Contains the default boot helper image Flash SIMM
socket P2
NVRAM 128 KB 1 Nonvolatile EPROM for the system
configuration file
U69