Nortel 2500 Series User Manual (English)

Questions and Answers:

S
Susan FrankJul 30, 2025
What to do if all LEDs are off on my Nortel 2500?
- F
  ffisherJul 30, 2025
  If all the LEDs are off on your Nortel Network Router, it indicates that the switch is not receiving AC power or the fans are not operating, potentially causing the unit to overheat. First, verify that the AC power cord is securely fastened at both ends and that there is power at the AC outlet. Also, ensure there is enough space around the switch for adequate airflow on both sides. Avoid placing the switch in direct sunlight or near heat sources, and ensure the operating temperature does not exceed 40°C (104°F).
M
Molly Campbell MDAug 7, 2025
What to do if Nortel Network Router has port connection problems?
- W
  wclarkAug 7, 2025
  If you're experiencing port connection problems with your Nortel Network Router, ensure that the cable connections are secure and that the cables are connected to the correct ports at both ends. You can also use the Port Management page to disable autonegotiation for the suspect port. Manually set the Speed/Duplex field to match the speed/duplex mode of the connected station. Alternatively, disable the autonegotiation feature at the connected station and manually set the speed/duplex mode of the connected station to the same speed/duplex mode you have manually set for the port.
T
Todd TapiaAug 13, 2025
Why is the Activity LED off or not blinking on my Nortel Network Router port?
- J
  Jeff CamposAug 14, 2025
  If the Activity LED for a connected port on your Nortel Network Router is off or not blinking, even when you believe traffic is present, it suggests a port connection problem or the switch's link partner may not be autonegotiating properly. See "Port connection problems" (page 339).
E
Elizabeth LopezAug 22, 2025
How to resolve a mode mismatch problem on Nortel 2500 Network Router?
- R
  Regina HoldenAug 22, 2025
  To resolve a mode mismatch problem on your Nortel Network Router, ensure that the devices are connected using the appropriate crossover or straight-through cable, or that autonegotiation is active.

Nortel 2500 Series Specifications

General

Brand	Nortel
Model	2500 Series
Category	Network Router
Language	English

Summary

New in this release

Features

Details changes related to features in Release 4.1, referencing specific sections.

Other changes

Details non-feature-related changes in Release 4.1, referencing specific sections and screens.

Introduction

Before you begin

Outlines the prerequisite background knowledge for network administrators reading the guide.

Text conventions

Explains text conventions used throughout the guide for clarity.

Ethernet Routing Switch 2500 Series hardware

Hardware components of the Ethernet Routing Switch 2500 Series

Describes the hardware features and components of the ERS 2500 Series devices.

Network configuration examples

Provides network configuration examples for different office scenarios, highlighting QoS.

Nortel Ethernet Routing Switch 2500 Series stacking

Stacking capabilities

Details the built-in rear ports and compatibility for stacking up to eight units.

Stacking functionality delivery

Explains the two methods for delivering stacking functionality on ERS 2500 series switches.

Stack configuration

Provides steps for setting up a stack of up to eight units for intelligent, fail-safe stacking.

System configuration software features

Switch management features

Covers management methods like CLI, Device Manager, and Web-based interface.

CLI Basics

Explains Command Line Interface usage, modes, navigation, and commands.

Getting Started with Device Manager

Installing Device Manager

Provides instructions for installing JDM software on Windows, UNIX, or Linux.

Device Manager basics

Covers starting, setting properties, opening devices, and the Device Manager window.

Using the Web-based management interface

Requirements

Lists necessary items for using the web-based management interface.

Logging in to the web-based management interface

Details the procedure for accessing the switch's web-based management interface.

Power over Ethernet for the Ethernet Routing Switch 2526T-PWR and 2550T-PWR

Diagnosing and correcting PoE problems

Discusses common PoE issues and troubleshooting steps.

Configuring PoE switch parameters using the CLI

Explains how to configure PoE DC power source, power pairs, and usage via CLI.

Configuring PoE port parameters using the CLI

Details CLI commands for enabling power, setting limit, and priority per port.

Displaying PoE configuration using the CLI

Covers CLI commands to display PoE status, power limit, and priority.

Configuring PoE using Web-based management

Guides on configuring PoE parameters via the web-based management system.

System configuration using the CLI

Configuring the switch IP address, subnet mask and default gateway

Explains CLI commands for setting IP address, subnet mask, and default gateway.

Using DNS to ping and telnet

Details how to use DNS client for pinging and telnetting hosts by name.

Configuration Management

Covers automatic loading of configuration files and ASCII Configuration Generator.

Customizing your system

Explains CLI commands for terminal settings, system information, boot, TFTP, and banner.

Saving the configuration to NVRAM

Describes CLI commands to save configuration parameters to NVRAM.

Enabling and disabling autosave

Explains how to enable/disable the autosave feature and manual saving.

Setting time on network elements using Simple Network Time Protocol

Details SNTP configuration for synchronizing device clocks with UTC.

Configuring LLDP using the CLI

Covers CLI commands for configuring Link Layer Discovery Protocol properties.

Ethernet port management using the CLI

Enabling or disabling a port

Provides CLI commands to enable or disable ports on the switch.

Naming ports

Explains CLI commands for naming or renaming switch ports.

Setting port speed

Details CLI commands for setting port speed and duplex mode.

Enabling flow control

Describes CLI commands to control traffic rates on Gigabit Ethernet ports.

Enabling rate-limiting

Explains CLI commands to limit multicast or broadcast traffic percentages.

Configuring the switch using Device Manager

Viewing Unit information

Describes how to view unit information using the Unit dialog box.

Viewing switch IP information

Details how to view IP information via the IP dialog box tabs.

Editing the chassis configuration

Explains how to edit chassis configuration through dialog box tabs.

Working with configuration files

Covers viewing, uploading, and downloading configuration and image files.

Working with SNTP

Details SNTP configuration parameters within the SNTP_Clock dialog box.

Displaying topology information using Device Manager

Explains how to view topology information via the Topology and Topology Table tabs.

Administering the switch using web-based management

Viewing system information

Describes how to view switch information via the System Information page.

Quick Start

Guides the initial setup by consolidating multiple pages into a single interface.

Configuring system security

Refers to a separate document for detailed system security configuration.

Rebooting the Ethernet Routing Switch 2500 Series

Explains how to reboot a unit or stack without erasing configured parameters.

Changing the Ethernet Routing Switch 2500 Series to system defaults

Details how to replace configured parameters with factory default values.

Logging out of the management interface

Provides the procedure for logging out of the web-based management interface.

Configuring the switch using web-based management

Configuring BootP, IP, and gateway settings

Covers configuring BootP, IP addresses, subnet masks, and default gateway.

Modifying system settings

Explains how to create or modify system name, location, and contact information.

Configuring switch port status

Details configuring port properties like autonegotiation, speed, and duplex.

Configuring high speed flow control

Provides parameters for viewing and configuring high speed flow control.

Downloading switch images

Guides on downloading software images to flash memory via TFTP server.

Troubleshooting

Interpreting the LEDs

Provides information on interpreting the LEDs on the Ethernet Routing Switch.

Diagnosing and correcting problems

Outlines steps for isolating and diagnosing problems, including power-up sequences.

Port connection problems

Addresses issues related to poor cable connections or autonegotiation mismatches.

Appendix E Technical specifications

Environmental specifications

Lists operating and storage specifications for temperature, humidity, and altitude.

AC power specifications

Details AC power input current, voltage, consumption, and thermal rating.

Physical dimensions

Provides physical dimensions like height, width, depth, and weight for the devices.

Performance specifications

Lists performance metrics such as frame forward rate and MAC address database size.

Network protocol and standards compatibility

Lists supported protocols and standards like IEEE 802.3.

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