Appendix A Troubleshooting

Solving Problems

Router partially boots, but LEDs do not go on.

Check for a power supply failure by inspecting the system LED on the front panel of the router. If the system LED is on, the power supply is functional.

If the system LED is not on, see the “Obtaining Technical Assistance” section on page xvii for information about customer service.

Check for a power supply failure by inspecting the power supply LEDs on the front panel. See the “Reading Front-Panel LEDs” section on page A-4for power supply LED descriptions.

Environmental Reporting Features

If the router is operating at an abnormally high temperature, the following message is displayed on the console screen:

%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling

problem immediately!

Some causes of abnormally high router temperature are as follows:

Fan failure

Air conditioner failure in the room

Air blockage to cooling vents

Take steps to correct the problem. See also the “Site Environment” section on page 2-4and the “Equipment Racks” section on page 2-4.

Troubleshooting Modules, Cables, and Connections

Network problems can be caused by a module; cables or cable connections; or external devices such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to help isolate the problem:

Module is not recognized by the router.

Make sure that the module is firmly seated in its slot.

Check the LEDs on the module. Each module has its own set of LEDs. For information on these LEDs, see the online Cisco Network Modules Hardware Installation Guide.

Make sure you have a version of Cisco IOS software that supports the module. Check the online Software Configuration Guide for Cisco 2600, Cisco 3600, and Cisco 3700 Series Routers or accompanying configuration note for software requirements for the network module.

Module is recognized, but interface ports do not initialize.

Make sure that the module is firmly seated in its slot.

Check external cable connections.

Make sure that you have a version of Cisco IOS software that supports the network module and interface card. Check the Cisco Network Modules Hardware Installation Guide and the Cisco Interface Cards Hardware Installation Guide or accompanying configuration notes for the affected network module and interface card software requirements.

Cisco 3700 Series Routers Hardware Installation Guide

 

OL-2180-08

A-3

 

Page 83
Image 83
Cisco Systems 3700 Series manual Environmental Reporting Features, Troubleshooting Modules, Cables, and Connections

3700 Series specifications

Cisco Systems 3700 Series routers are a pivotal part of Cisco's portfolio, designed for medium to large enterprises aiming to deliver secure and efficient networking capabilities. Introduced as a versatile solution, these routers provide a comprehensive blend of performance, scalability, and investment protection.

One of the standout features of the Cisco 3700 Series is its modular architecture, allowing organizations to customize their router according to specific needs. This modularity supports various modules for different functions, including voice, data, and video, making the 3700 Series an ideal choice for converged networking environments. Administrators can enhance functionality through an array of WAN and voice interface cards that adapt as the organization's needs evolve.

The 3700 Series is built on Cisco's IOS (Internetwork Operating System), ensuring robust and high-quality performance. It supports advanced routing protocols including EIGRP, OSPF, and BGP, facilitating efficient data transmission across diverse environments. This versatility helps organizations implement sophisticated multi-site connectivity and enables reliable performance in complex network scenarios.

Security is a paramount concern in modern networking, and the Cisco 3700 Series delivers with features such as integrated firewall services, VPN support, and intrusion detection capabilities. These security measures protect sensitive data and ensure secure communication between remote sites—critical in today’s cyber landscape.

Another key characteristic of the 3700 Series is its support for Quality of Service (QoS), which prioritizes time-sensitive traffic such as voice and video. By ensuring that critical applications receive the bandwidth they require, organizations can maintain the quality of service that their users expect.

Moreover, the Cisco 3700 Series is designed with redundancy in mind. Features like dual power supplies and hot-swappable fan trays enhance reliability and uptime, which are crucial for mission-critical applications.

Furthermore, energy efficiency is an increasingly important consideration in network design. The Cisco 3700 Series adheres to modern energy standards, helping reduce the overall carbon footprint while supporting high-performance capabilities.

In summary, the Cisco Systems 3700 Series routers stand out for their modularity, advanced routing capabilities, robust security features, and energy efficiency, making them an optimal choice for enterprises that not only need performance but also flexibility and reliability in their networking solutions. As businesses continue to evolve and adapt, the Cisco 3700 Series is a dependable partner in their connectivity journey, ensuring they can meet current demands while preparing for future challenges.