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Alteon Web Switch Hardware Installation Guide
Chapter 3: Using the Console Port
27
212779-A, December 2001
Troubleshooting
This section contains information about possible problems that may occur or error messages
that might display if the switch is not properly installed or configured.
Link LED Does Not Light
Symptom
The green Link LED does not light. When you check the Link state using the console terminal
(see the Web OS switch software manuals), the status is reported as down.
Cause
n Port configuration mismatch. If the switch port is configured with a specific speed or
duplex mode (for example, 100 Mbps, full duplex) check to see that the other device is set
to the same configuration. If the switch port is configured to auto-negotiate, verify that the
other device is also set to auto-negotiate. Refer to the appropriate Web OS switch software
manuals for more information about setting speed and mode.
n Cable problem. Make sure you are using the correct type of cable to connect the switch to
other devices. Refer to Figure 10 on page 21 for information about crossover cables for
connecting switches, hubs, or routers to Alteon Web switches.
Temperature Sensor Error Message
The following message is displayed on the console if the temperature of an Alteon Web switch
exceeds the threshold. Immediate attention is required.
Actions
n Make sure that the air circulation vents on the front, back, and sides of the switch are free
from obstruction by cables, panels, rack frames, or other materials.
n Make sure that all four cooling fans inside the switch are running. The fans are located
behind the ventilation grill at the rear of the switch. The exhaust from all four fans should
be blowing outward with roughly equal air pressure (it is normal for the exhausts to have
different temperatures). You can also use a flashlight to check whether the fan blades are
moving. If any fan stops during switch operation, contact Customer Support.
Temperature at sensor xxx exceeds threshold
Current temperature is xx
o
C Threshold is xx
o
C