McDATA 4314 Installation Guide download pdf (Page 17)

General Description

1-5

Fibre Channel Ports

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.

Transceivers

Switch modules support SFP optical transceivers for the Fibre Channel ports.

A transceiver converts electrical signals to and from optical laser signals to

transmit and receive data. Duplex fiber optic cables plug into the transceivers

which then connect to the devices. A Fibre Channel port is capable of

transmitting at 1-Gbps or 2-Gbps; however, the transceiver must also be

capable of delivering at these rates.

The SFP transceivers are hot pluggable. This means that you can remove or

install a transceiver while the switch module is operating without harming

the switch module or the transceiver. However, communication with the

connected device will be interrupted. Refer to “Install SFP Transceivers” on

page 3-3 for information about installing and removing SFP optical

transceivers.

Logged-In

LED (Green)

Activity LED

(Green)

10 11 12 13

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McDATA 4314 Installation Guide Page 17