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Port Diagnostic Test
The Port Diagnostic Test checks all ports. If a problem is detected, an LED in
the corresponding row (which indicates the malfunctioning port) and column
(which indicates the failed component) will light up as shown below.
LED Indicator
(Column)
4 (20% LED)
5 (35% LED)
6 (50% LED)
7 (70% LED)
Note: Enabling the Diagnostic function activates tests similar to the one performed upon
power on. After successfully completing diagnostics, the system returns to normal
operation.
Port Status Display
← Port 1 statistcs are displayed on the top row
← Port 2 statistcs are displayed on the bottom row
← Status
Indicates a valid network connection associated with the port.
Status (Link) -
Link
LED Activity
Condition
STEADY LIGHT
ON
NO LIGHT
OFF
: If the Link LED does not light up when a device is connected to its
Troubleshooting
corresponding port, check that both the switch and connected device are powered on.
For devices connected to the switch using twisted-pair cable (i.e., when making 10BASE-T
or 100BASE-TX connections), check that the cable length does not exceed 100 meters.
Use standard, straight-through cables and not crossover or other specialized cables.
When connecting to a 100BASE-FX device, be sure the fiber optic cable does not
exceed 2 kilometers. Also remember to account for power loss when calculating the
maximum length you can run fiber optic cabling as described in Chapter 2.
3-8
Fast SwitcHub-2se User's Guide
Color
Diagnostic Test Status
Green
Failed Port IC Test
Green
Failed Routing Table Test
Orange
Failed Input Queue RAM Test
Orange
Failed Output Queue RAM Test
Indicates a valid link has been established on this port.
No valid link has been established on this port.
Hardware Reference
Indication
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