Prp Sdram - Cisco XR 12406 Installation Manual

Physical and Functional Description

PRP SDRAM

Caution
Note
Cisco XR 12406 Router Installation Guide
1-18
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 1-5 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 1-5 PRP-2 DRAM Configurations
Total
SDRAM SDRAM Sockets
Total
SDRAM SDRAM Sockets
1
2 GB U15 (bank 1)
U18 (bank 2)
4 GB U15 (bank 1)
U18 (bank 2)
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
memory products approved by Cisco, listed in
PRP-3 provides more system memory than PRP-2. PRP-3 is shipped with 2 GB
of system memory in each DDR2 DRAMs, for a total of 4 GB and provides an
upgrade option for a total of 8 GB (4 GB x 2 DRAM).
The two DIMMs must be of the same sizes. Do not use two different DIMM sizes
together.
Chapter 1 Cisco XR 12406 Router Overview
Number of DIMMs
Number of DIMMs
One 2 GB DIMM
or
Two 2 GB DIMMs
One 4 GB DIMM
or
Two 4 GB DIMMs
Table 1-5.
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