Sun Microsystems manual 3Sun Fire V490 Server Back Panel Features, 5Ethernet LEDs

Locator LED	Power/OK LED
Fault LED	SC card	USB ports
		(see Figure 2-4)

PCI card slots

SC ports:
Serial
Ethernet				AC input for
				Power Supply 0
		Serial port FC-AL port	Ethernet ports	Power Supply 0
				status LEDs
AC input for	Power Supply 1	(The ports above not visible in this illustration;
Power Supply 1	status LEDs	see Figure 2-4.)

FIGURE 2-3Sun Fire V490 Server Back Panel Features

Main system LEDs—Locator, Fault, and Power/OK—are repeated on the back panel. (See TABLE 2-1, TABLE 2-2, and TABLE 2-3for descriptions of front panel LEDs.) In addition, the back panel includes LEDs that display the status of each of the two power supplies and both on-board Ethernet connections. Two LEDs located on each Ethernet RJ-45 connector display the status of Ethernet activity. Each power supply is monitored by four LEDs.

Details of the diagnostic use of LEDs are discussed separately in the section, “How to Isolate Faults Using LEDs” on page 172.

TABLE 2-5lists and describes the Ethernet LEDs on the system’s back panel.

TABLE 2-5Ethernet LEDs

Name	Description
Activity	This amber LED lights when data is either being
	transmitted or received by the particular port.
Link Up	This green LED lights when a link is established at the
	particular port with its link partner.

Chapter 2 System Overview 17