Prp Sdram; Prp Sram - Cisco 12416 Installation And Configuration Manual

Chapter 1 Product Overview

PRP SDRAM

Caution

PRP SRAM

OL-11495-01
The PRP uses Error Checking and Correction (ECC) Synchronized Dynamic
Random Access Memory (SDRAM) to store routing tables, protocols, network
accounting applications, and to run Cisco IOS software.
Table 1-4 lists the DRAM configurations for the PRP. If you are using:
One DIMM—Bank 1 (U15) must be populated first.
•
Two DIMMs—You cannot mix memory sizes; both banks must contain the
•
same size DIMM.
Table 1-4 PRP DRAM Configurations
Total
SDRAM Part Number
1
512 MB ???(=)
1 GB ???(=)
2 GB ???(=)
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 2 MB 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.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
Alarm Card, Line Card, and Rout Processor Overview
SDRAM Sockets Number of DIMMs
U15 (bank 1) One 512 MB DIMM
U18 (bank 2) or
Two 256 MB DIMMs
U15 (bank 1) One 1 GB DIMM
U18 (bank 2) or
Two 512 MB DIMMs
U15 (bank 1) Two 1 GB DIMMs
U18 (bank 2)
Table 1-4.
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