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Preliminary
Front Panel LEDs
SANbox-16HA Fibre Channel Switch
Installer’s/User’s Manual 59005-03 Rev. A General Description 1-21
Over Temperature LED (Red)
This LED is normally OFF. The over temperature LED illuminates to indicate that
the air temperature inside the switch has exceeded a certain limit. If this LED
illuminates, inspect the following:
• Ambient air temperature: maximum 40°C (104°F)
• Proper clearance: 163mm (6.5”) front, left side, and back
• Fan operation
• Power supply operation
If the over temperature LED remains illuminated, contact your authorized mainte-
nance provider (refer to Appendix B ).
Logged-In LED (Green)
Each port has its own Logged-In LED. The Logged-In LED indicates the logged-in
or initialization status of the connected device or loop of devices. A T_Port
Logged-In LED will blink to indicate that the switch has been disabled due to a
chassis number conflict.
Normal Operation
Initially (immediately after the Switch successfully completes the POST), the
Switch holds all Logged-In LEDs OFF (no light). They each remain OFF until the
port and its attached devices are able to successfully perform a loop initialization
(LIP) or port log-in. Following a successful LIP or log-in on a particular port, the
Switch turns the Logged-In LED ON (lit) for that port. This shows that the port is
properly connected and able to communicate with its attached device/s. The LED
for this port remains ON as long as the port is initialized or logged-in.
If the established/logged-in link is broken (a fiber opens or the connected port goes
out of service), the Logged-In LED is shut OFF. If the link is replaced or the
connected port comes back into service, the port and its attached device/s will try
to regain its initialized or logged-in status. If the initialization/log-in is once again
established, the Switch turns the Logged-In LED back ON and communication
continues.
It is best to have the Switch operating before the attached nodes are powered up.
Duplicate Chassis Number Warning
Upon T_Port Login, if the fabric senses two switches of the same stage type (cross-
connect or IO/T) with the same chassis number, the switch with the higher world
wide name will be disabled. In addition, the affected port Logged-In LEDs on both
switches will blink to indicate that a conflict exists. Refer to “Multistage
Topology” on page 5-12 for more information about stage types.