Cisco Systems Cisco 12816 Manuale Utente
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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Chapter 1 Product Overview
Alarm Card, Line Card, and Rout Processor Overview
GRP DRAM
The GRP uses Extended Data-Out (EDO) Dynamic Random Access Memory
(DRAM) to store routing tables, protocols, network accounting applications, and
to run Cisco IOS software.
(DRAM) to store routing tables, protocols, network accounting applications, and
to run Cisco IOS software.
lists the DRAM configurations for the GRP.
Caution
DRAM DIMMs must be 3.3-volt, 60-nanosecond devices only. Do not attempt to
install other devices in the DIMM sockets. To prevent memory problems, use the
Cisco approved memory products listed in
install other devices in the DIMM sockets. To prevent memory problems, use the
Cisco approved memory products listed in
GRP SRAM
Static Random Access Memory (SRAM) provides 512 KB of secondary CPU
cache memory. Its principal function is to act as a staging area for routing table
updates, and for information sent to and received from the line cards. SRAM is
not user-configurable and cannot be upgraded in the field.
cache memory. Its principal function is to act as a staging area for routing table
updates, and for information sent to and received from the line cards. SRAM is
not user-configurable and cannot be upgraded in the field.
GRP NVRAM
Nonvolatile Random Access Memory (NVRAM) provides 512 KB 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.
Table 1-2
GRP DRAM Configurations
Total DRAM
Part Number
DRAM Sockets
Number of DIMMs
128 MB
1
1.
Default shipping configuration.
MEM-GRP/LC-64(=)
U39 (bank 1)
U42 (bank 2)
U42 (bank 2)
Two 64 MB
128 MB
MEM-GRP/LC-128(=)
U39 (bank 1)
One 128 MB
256 MB
MEM-GRP/LC-256(=)
U39 (bank 1)
U42 (bank 2)
U42 (bank 2)
Two 128 MB