Cisco Systems Cisco 12816 Manuale Utente
Chapter 1 Product Overview
Alarm Card, Line Card, and Rout Processor Overview
1-42
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
PRP NVRAM
Non-volatile Random Access Memory (NVRAM) provides 2 MB of memory for
system configuration files, software register settings, and environmental
monitoring logs. Built-in lithium batteries retain the contents of NVRAM for a
minimum of 5 years. NVRAM is not user configurable and cannot be upgraded in
the field.
system configuration files, software register settings, and environmental
monitoring logs. Built-in lithium batteries retain the contents of NVRAM for a
minimum of 5 years. NVRAM is not user configurable and cannot be upgraded in
the field.
PRP Flash Memory
Use flash memory to store multiple Cisco IOS software and microcode images
that you can use to operate the router. You can download new images to flash
memory over the network (or from a local server) to replace an existing image, or
to add it as an additional image. The router can be booted (manually or
automatically) from any of the stored images in flash memory.
that you can use to operate the router. You can download new images to flash
memory over the network (or from a local server) to replace an existing image, or
to add it as an additional image. The router can be booted (manually or
automatically) from any of the stored images in flash memory.
Flash memory also functions as a Trivial File Transfer Protocol (TFTP) server to
allow other servers to boot remotely from the stored images, or to copy them into
their own flash memory.
allow other servers to boot remotely from the stored images, or to copy them into
their own flash memory.
The system uses two types of flash memory:
•
Onboard flash memory (called bootflash)—Contains the Cisco IOS boot
image
image
•
Flash memory disks (or cards)—Contain the Cisco IOS software image
lists supported flash disk sizes and Cisco part numbers.
Table 1-5
Supported Flash Disk Sizes
Flash Disk Size
1
1.
Standard Type 1 and Type 2 linear flash memory cards also are supported,
although they may not have the capacity to meet the configuration
requirements of your system.
although they may not have the capacity to meet the configuration
requirements of your system.
Part Number
64 MB
2
2.
Default shipping configuration.
MEM-12KRP-FD64=
128 MB
MEM-12KRP-FD128=
1 GB
MEM-12KRP-FD1G=