Cisco 7120 Series Kullanıcı Kılavuzu - Sayfa 36
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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—Stores the system configuration and environmental monitoring logs (the NVRAM uses
lithium batteries to maintain its contents when disconnected from power).
•
Console port—Provides access for a local terminal and is equipped with an RJ-45 receptacle.
•
Auxiliary port—Provides access for a modem for remote access and is equipped with an RJ-45
receptacle.
•
Two fixed LAN ports—Provide 10BaseT/100BaseTX autosensing Ethernet/Fast Ethernet (full and
half duplex) and are equipped with an RJ-45 receptacle.
•
Two PC Card slots—Contain Flash Disks or Flash memory cards that provide the default Cisco IOS
software image.
Table 1-15
Table 1-15 Network Processor Memory Components
Memory Type
SDRAM
memory
Boot ROM
Cisco 7100 Series VPN Router Installation and Configuration Guide
1-36
Cisco 7140 series routers have three levels of cache: a primary and a secondary cache that are
internal to the microprocessor and a tertiary, 2-MB (fixed) external cache that provides
additional high-speed storage for data and instructions.
describes the memory types on the network processor card.
Size
64 to 128 MB
512 KB
Quantity
Description
1
2 configurable
64–128-MB DIMMs
SDRAM slots
(based on maximum
SDRAM required)
2
1
OTP
ROM for the ROM
monitor program
Chapter 1
Overview
Location
DIMM 1 = U13
DIMM 2 = U14
Socket U21
78-6341-03