SWITCH MONITORING AND

6 MAINTENANCE

Monitoring the Switch Although the Switch 8800 Family has undergone a comprehensive and strict factory test before delivery, there might be some fault occurring due to improper installation. This chapter describes how to troubleshoot the Switch 8800 Family.

Troubleshooting Console If the system is normal after the Switch is powered on, the booting information Terminal will be displayed on the Console terminal. If the configuration system has failed,

the Console terminal may give illegible output or nothing at all.

1The terminal gives no displays after the Switch is powered on. In this case, you should check if:

The power system is working normally.

The fabric is working normally.

The Console cable has been connected to the Console port on the fabric.

If no problem has been found in the above checking, the symptom is very likely caused by the errors listed below.

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 terminal emulation.)

The Console cable is not in good condition.

2The terminal gives illegible characters.

This symptom is very likely caused by a Console terminal setting error. In this case, 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 terminal emulation.

Troubleshooting PSU

Table 73 Description of the LEDs on PSU

LED

Description

 

 

INPUT

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

 

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

OUTPUT

It keeps ON if the power output is normal and OFF in any other cases.

FAIL

It keeps ON if the PSU has failed and OFF in any other cases.

 

 

Following are the PSU faults that likely appear and the methods used for problem isolation.

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3Com 8810, 8807, 8814 manual Switch Monitoring Maintenance, Troubleshooting PSU, Description of the LEDs on 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.