3Com 3C16630A, User Manual

Page: 22 / 132

2-6 C
H A P T E R
2: I
N S T A L L A T I O N A N D
S
E T U P F O R
M
A N A G E M E N T
DUA1663-0BAA03
Power Up Sequence
W hen any unit in the stack is powered up, the M odule will reset all the
units in the stack. Therefore, to avoid an unnecessary number of resets,
power up any other units in the stack before powering up the unit
containing the M odule.
Connect the mains power cable to the unit with the M odule installed,
and switch on at the mains socket. The module will perform tests on all
units in the stack, and the unit will run through its self-test sequence.
This may take up to 20 seconds. The MGMT LED on the front panel of
the unit will flash during the self-test.
At the end of the self test:
■
The MGMT LED on the front panel of the manage ment u nit will light
up steady green.
■
The appropriate UNIT number LED on each unit in the stack will light.
If the MGMT LED is off, colored red or flashing, refer to “LEDs and Reset
Button” on page 2-7 .
As a default, the M odule powers up the unit with:
■
A null IP address.
■
The serial port set to autoconfiguration. (Autoconfiguration applies to
baud rate only. Parity, character size and stop bits are fixed.)
■
All ports enabled.
The unit will function normally but you may need to configure some of
these parameters before you can manage the unit, as explained in the
sections “Connecting Management Equipment to the Serial Port” and
“Managing over the Network” later in this chapter.