34 Chapter1
Installing and Configuring 10/100Base-TX/9000
What Happens During Card Initialization Sequence?
What Happens During Card Initialization
Sequence?
Following is an overview of the initialization sequence for the HPPB
10/100Base-TX card:
Initialization of an HP-PB 10/100Base-TX card happens during system
bootup only, and it is driven by the btlan1 driver for the card. The card
consists of two boards: the motherboard and the daughterboard.
Initialization is divided into two phases: initialization of the
motherboard and initialization of the daughterboard. The initialization
of each of these boards is further divided into the initialization of each of
the major programmable components on the boards. Initialization
consists of the following sequential tasks: identification of a component,
resetting a component, if applicable, and configuration.
Two LEDs on the card are related to the proper installation and
functioning of the card: the Power and Test LEDs. None of the
components on either of the boards is identifiable if the power does not
reach the card, in which case the Power LED on the card does not light.
The card might not be seated properly in this case. Even if the Power
LED is lit, some of the components could still fail to identify correctly if
the card is not properly seated or if the card is defective. In such a case
the initialization of that component fails to complete and the Test LED
on the card is lit. In one case, the component on the motherboard which
is responsible to drive the Test LED may be defective or may not be
reached due to the improper seating of the card in which case the
initialization aborts without lighting the Test LED. However, whenever
initialization fails, it prints a message on the console identifying the
failure. You can later retrieve initialization messages after the system is
fully booted up by using the dmesg command.
Finally, the driver tries to establish a good data link between the card
and the hub or switch. If there is no cable connection, or if the cable
connection is bad, or if the hub or switch is not compatible, that is, not
10Base-T or 100Base-TX capable, the Link LED will not be lit and either
10Base-T LED or 100Base-TX LED will be lit at random. In this
situation, the Test LED will not be lit. Also, a message indicating the
detection of a bad cable connection is printed on the console as well as
logged in NETTL logs.
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