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General Description
1-5
Fibre Channel Ports
External Port LEDs
Each external port has its own Logged-In LED (L) and Activity LED (A) as
shown in Figure 1-6.
Figure 1-6. External Port LEDs
Port Logged-In LED (Green)
The Logged-in LED indicates the logged-in or initialization status of the
connected devices. After successful completion of the POST, the switch
module extinguishes all Logged-In LEDs. Following a successful loop
initialization or port login, the switch module illuminates the corresponding
logged-in LED. This shows that the port is properly connected and able to
communicate with its attached devices. The Logged-In LED remains
illuminated as long as the port is initialized or logged in. If the port
connection is broken or an error occurs that disables the port, the Logged-In
LED will flash. Refer to “Logged-In LED Indications” on page 4-2 for more
information about the Logged-In LED.
Port Activity LED (Green)
The Activity LED indicates that data is passing through the port. Each frame
that the port transmits or receives causes this LED to illuminate for 50
milliseconds. This makes it possible to observe the transmission of a single
frame. When extending credits, the Activity LED for a donor port will reflect
the traffic of the recipient port. Refer to “Distance” on page 2-4 for more
information about extended credits and donor ports.
Logged-In
LED (Green)
Activity LED
(Green)
11
12 13
14 15
10