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Cisco 10008 Router Hardware Installation Guide
OL-0659-13
Chapter 5 Maintaining the Cisco 10008 Router
Upgrading SDRAM on the PRE
Caution To prevent (electrostatic discharge) ESD damage, always wear an ESD-preventive wrist or ankle strap,
and handle DIMMs by the edges only. Avoid touching the memory pins or traces (the metal fingers along
the connector edge of the DIMM).
The Cisco 10008 router system is hot-swappable, which means you can remove and replace a PRE while
the system is operating—if your configuration includes a secondary (redundant) PRE installed in the
chassis. The hot-swapping feature allows you to remove or replace a PRE while the system maintains
all routing information and ensures session preservation. See the “Removing and Replacing the PRE”
section on page 5-36 to remove the PRE from the chassis.
Removing and Installing DIMMS
Use the following steps to remove and replace DIMMs in the PRE module
Caution To upgrade SDRAM, you must install identical DIMMs in both DIMM sockets. Do not mix different
types of DIMMs.
Figure 5-50 Locating the SDRAM DIMMs
Step 1 Remove the PRE according to the instructions in the “Removing and Replacing the PRE” section on
page 5-36.
Table 5-1 Available SDRAM Upgrades
SDRAM Upgrade Options Cisco Part Number
256 MB SDRAM ESR-PRE-MEM-256M=
512 MB SDRAM ESR-PRE-MEM-512M=
1 DIMM slots
132837
1