DIGITAL GIGAswitch/Ethernet System Upgrading Switch Control Processor Memory

This document provides a comprehensive guide for upgrading the Switch Control Processor (SCP) memory (DRAM) in a DIGITAL GIGAswitch/Ethernet system. It explains that memory upgrades may be necessary for systems with a large number of VLANs or extensive statistics collection. The upgrade process is divided into three main phases:

1. Checking Available System Memory: Users are instructed to access "RAM Info" via the web agent browser to assess current memory usage. An upgrade is recommended if available "Dynamically Allocated Memory" falls below 1 MB or if the switch has a very high port density.
2. Performing the Upgrade: This section details the physical steps for replacing the memory module. It emphasizes antistatic precautions, shutting down the switch, carefully removing the SCP module, replacing the Single Inline Memory Module (SIMM) with a new one, reinstalling the SCP module, and powering on the switch.
3. Verifying the Installation: After the upgrade, users are advised to relaunch the web agent and re-check "RAM Info" to confirm that the newly added memory capacity is displayed.

The document also offers extensive guidelines for Deciding When to Upgrade, outlining factors that influence memory requirements, such as the number and type of modules, the quantity of VLANs created, and the number of MAC addresses stored. It provides Memory Usage breakdowns for firmware, software initialization, temporary memory, and individual modules, as well as tables for address learning memory consumption. Finally, Calculations are provided with a formula and examples to help users determine their specific memory needs based on their system configuration.