DECrepeater 900GM Installation and Configuration

This document, "DECrepeater 900GM Installation and Configuration" (August 1994), serves as a guide for setting up, configuring, and troubleshooting the DECrepeater 900GM module.

The DECrepeater 900GM is a full-height Ethernet repeater equipped with 24 external 10BaseT ports and one AUI port. It can be integrated into a DEChub 900 MultiSwitch (supporting up to 8 modules) or operate as a standalone unit when paired with a DEChub ONE docking station, featuring hot-swap capability for easy installation and removal without powering down.

Key features highlighted include:

• Automatic module self-test and port-level packet address security.
• Support for in-band and out-of-band management (via Serial Line Internet Protocol - SLIP) using Simple Network Management Protocol (SNMP), including various Management Information Bases (MIBs).
• Upgradeable device firmware stored in nonvolatile Flash memory, performed using Trivial File Transfer Protocol (TFTP).
• User-friendly Graphical User Interface (GUI) manageability through Digital's HUBwatch Network Management Station.

Installation involves physically seating the module, verifying its power-up and self-test status via front panel LEDs, and connecting the Telco and AUI cables.

Configuration is performed through a setup port (using a terminal or PC at 9600 baud) which provides a menu-driven interface. Key configuration options include:

• Resetting the module to factory defaults or current settings.
• Setting SNMP Read/Write Community names and adding/deleting SNMP Trap Addresses.
• Assigning In-Band Interface IP Addresses and Default Gateway Addresses.
• Configuring Out-of-Band Management (OBM) IP addresses and port speeds (for standalone use).
• Performing firmware upgrades, with a critical caution against interrupting power during Stage 3 of the Downline Upgrade (DLU) process to prevent firmware corruption.

The document also provides detailed descriptions of the module's LEDs for status monitoring and offers a problem-solving guide that correlates LED states with probable causes and corrective actions for common issues, such as power problems, self-test failures, and network connectivity issues.