3Com 5102B-EE Diagnostics and Self-Test, Backplane Channels Bridged Together

Figure 1-4. Backplane Channels Bridged Together

Diagnostics and Self-Test

On power-up, the Bridge Module performs the following diagnostic tests:

❑Bridge self-tests

❑CRC check of code memory (Flash EPROM)

❑Port loopback tests

These tests allow the Bridge Module to check its own circuitry and communication interfaces to verify its ability to send and receive data. If the bridge fails any of the diagnostics, the front panel LEDs indicate an error code. Power-up self-test and error codes are described in Chapter 5 and in Appendix D. You can also diagnose local and remote bridges using the management commands. These commands allow you to view bridge and network information that is helpful in diagnosing network and bridge problems. Chapter 4 provides a complete description of each Bridge Module command.

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