Cisco ESR10008 Hardware Installation Guide - Page 139

Chapter 5 Maintaining the Cisco 10008 Router Upgrading SDRAM on the PRE Table 5-1 Available SDRAM Upgrades SDRAM Upgrade Options 256 MB SDRAM 512 MB SDRAM Cisco Part Number ESR-PRE-MEM-256M= ESR-PRE-MEM-512M= 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 1 132837 1 DIMM slots Step 1 Remove the PRE according to the instructions in the "Removing and Replacing the PRE" section on page 5-36. OL-0659-13 Cisco 10008 Router Hardware Installation Guide 5-47