3Com CoreBuilder 3500, Getting Started Manual

Page: 51 / 96

System Checks 51
Table 11 summarizes the module LED activity. System Checks
After the system has successfully completed the
power-up diagnostics, check the items in Table 12 to
verify that the system is operating correctly.
.
If you discover any abnormal conditions, see
Chapter 7.
Table 11 Module Diagnostics — LED Activity
LED Name Color Indicates
ERR (Error - Module) Steady
yellow Diagnostics failed.
Blinking
yellow A hardware/software
mismatch has
occurred.
E (Error - Port) Yellow Port not operational.
L (Link status - Port) Green Diagnostics successful.
T (Traffic status - Port) Green Port is receiving or
transmitting data.
Table 12 System Power-up Checklist
Check Why?
Power-up error
messages If the software finds a problem during
power up, messages are displayed in the
Administration Console connection
through the terminal serial port.
Normal LED
activity When the power-up diagnostics are
running, the LEDs light in the pattern
described on page 48 in the section
“Power-up Diagnostics.” After the system
successfully completes the power-up
diagnostics, check for the following
normal LED activity:
System PWR LED = green
RUN LED = blinking green
SYS LEDs = off
Module ERR LED = off
Ports L LEDs (Link port status) = green
E LEDs (Error port status) = off
T LEDs (Traffic port status) = flashing green