Grp Dram; Grp Sram; Grp Nvram - Cisco 12416 Installation And Configuration Manual

Chapter 1 Product Overview

GRP DRAM

Caution

GRP SRAM

GRP NVRAM

OL-11495-01
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.
Table 1-2 lists the DRAM configurations for the GRP.
Table 1-2 GRP DRAM Configurations
Total DRAM Part Number
1
128 MB MEM-GRP/LC-64(=)
128 MB MEM-GRP/LC-128(=)
256 MB MEM-GRP/LC-256(=)
1. Default shipping configuration.
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
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.
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.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
Alarm Card, Line Card, and Rout Processor Overview
DRAM Sockets Number of DIMMs
U39 (bank 1) Two 64 MB
U42 (bank 2)
U39 (bank 1) One 128 MB
U39 (bank 1) Two 128 MB
U42 (bank 2)
Table 1-2.
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