SWITCH MONITORING AND

6 MAINTENANCE

Monitoring the Switch Although the Switch 8800 Family has undergone a comprehensive factory test before delivery, an improper installation may cause problems. This chapter describes how to troubleshoot the Switch 8800 Family.

Troubleshooting Console If the system running properly, when you power on the switch, you will see the Terminal boot information on the console terminal. If the switch is configured incorrectly,

the console terminal may display illegible output or nothing at all.

If the console does not display anything after you power on the switch, check that the:

Power system is working normally.

Fabric is working normally.

Console cable is connected to the console port on the fabric.

If you find no issues with these items, the problem is most likely one of the following:

The console cable is not connected to the right serial port. That is, the port in use is not the one configured on the terminal.

There are console terminal parameter errors. (According to the parameter setting requirements, you should set the baud rate to 9600, data bits to 8, parity to None, stop bits to 1, flow control to None, and select VT100 as your terminal emulation protocol.)

The console cable is not in good condition.

If the terminal displays illegible characters, it is most likely a console terminal setting error. Check that you have set the baud rate to 9600, data bits to 8, parity to None, stop bits to 1, flow control to None, and select VT100 as your terminal emulation protocol.

Troubleshooting the PSU

Table 75 LEDs on the PSU

LED

Description

 

 

INPUT

It stays ON if the power input is normal and the PSU switch is at the ON position.

 

It stays OFF if the power input has failed or if there is no power input at all.

OUTPUT

It stays ON if the power output is normal, otherwise it is OFF.

FAIL

It stays ON if the PSU has failed, otherwise it is OFF.

 

 

Page 79
Image 79
3Com 8814, 8807, 8810 manual Troubleshooting the PSU, LEDs on the PSU

8810, 8814, 8807 specifications

The 3Com 8814, 8810, and 8807 are renowned products from the networking giant 3Com, which played a significant role in the evolution of networking technology in the early 1990s. These devices were instrumental during a time when organizations were transitioning from traditional communication systems to more sophisticated networking solutions.

The 3Com 8814 is a multi-port networking hub designed for small to medium-sized businesses. One of its main features includes a 10Base-T Ethernet capability, allowing for fast and reliable connectivity among various devices within a local area network (LAN). The 8814 supports up to 14 connections, providing scalability for growing businesses. The hub’s ease of use is notable; it features a plug-and-play design, which aids in quick setup without requiring extensive configuration. This plug-and-play functionality, alongside its robust physical and electrical performance, made the 8814 an appealing choice for organizations looking to enhance their networking infrastructure without significant investment.

Moving on to the 3Com 8810, this device is labeled as an intelligent network switch and ushered in advancements in network management and performance. A critical element of the 8810 is its ability to support both 10/100Base-T Ethernet connections, effectively allowing mixed-speed environments. Its built-in management features, enabled by 3Com's networking technologies, offered users the ability to monitor traffic flow, manage bandwidth allocation, and configure network settings through a user-friendly interface. This switch also incorporated advanced features like VLAN support, increasing security and segmentation within networks, which proved invaluable for sophisticated networking environments.

Lastly, the 3Com 8807 represents a more versatile and high-performance switch option suited for larger networks. This model features a stackable design that allows for a broader range of scalability and redundancy. It supports both fast Ethernet and Gigabit Ethernet, ensuring that organizations can expand their network speeds as needed. The 8807 includes features for enhanced fault tolerance and link aggregation, which bolsters reliability and performance under heavy traffic loads. Its integration with 3Com's Network Management Software provided administrators with unprecedented control over their networks, empowering them to optimize performance and troubleshoot issues effectively.

Overall, the 3Com 8814, 8810, and 8807 exemplified the company's commitment to innovation in networking technology, providing businesses with the tools necessary to develop efficient, scalable, and reliable network infrastructures. Each of these devices played a crucial role in shaping the landscape of networking, emphasizing ease of use, management capabilities, and performance.