Sun Microsystems Netra t1 100, Руководство пользователя и администратора

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Chapter 9 Monitoring and Managing the System 87
The System’s Front and Back Panel LEDs
The Netra t1 contains two front panel LEDs:
■
A power indicator (see
FIGURE 9-3
).
This LED is lit when the system is powered on. It is not lit when the system is in
standby mode.
■
A fault indicator (see
FIGURE 9-3
).
This LED is lit by the LOM device if the operating system locks up. When the
operating system is running (in other words, when the operating system’s
watchdog is patting the LOM at regular intervals), the LOM turns the LED off. If
the LED is flashing, then the LOM has detected a fault that requires you to take
action, for example, to replace a fan or power supply unit that has failed. (You can
use the LOM’s
faulton
command to light this LED yourself; see
TABLE 9-1
.)
FIGURE 9-3
Front Panel Power and Fault LEDs
The Netra t1 contains four back panel LEDs (see
FIGURE 9-4
):
■
A power indicator.
This replicates the power indicator on the front panel.
■
A fault indicator.
This replicates the fault indicator on the front panel.
■
A link indicator for each Ethernet port.
The light comes on to indicate that a connection has been established to the hub.
FIGURE 9-4
Back Panel Ethernet Link, Power and Fault LEDs
Power Fault
Link 1 Link0 Fault Power
SysAdmin.book Page 87 Friday, March 30, 2001 2:38 PM