User`s manual

Preliminary
Front Panel LEDs
SANbox-8 Fibre Channel Switch
Installer’s/User’s Manual 59008-03 Rev. A General Description 1-21
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
chassis will blink to indicate that a conflict exists. Refer to “Multistage Topology”
on page 5-18 for more information about stage types.
Traffic LED (Yellow)
Each port has its own port traffic LED. The traffic LED for a particular port is ON
when Class 2, or 3 frames are entering or leaving the port. The Switch turns the
LED ON for 50 milliseconds for each frame, so you should be able to see it for one
frame. This LED will not light for frames following an arbitrated loop in bypass
mode.