IBM TotalStorage 3534-F08, Installation And User Manual

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the switch is unplugged, then plugged back in. A warm start is any other type of
startup, such as an operating system restart or switch panic.
A POST consists of the following steps:
1. Preliminary POST diagnostics are run.
2. The operating system is initialized.
3. The hardware is initialized.
4. Diagnostic tests are run on a number of the following functions:
v
Internal connections and circuitry
v
Port functionality
v
Ability to send and receive frames
v
Ability to implement QuickLoop functionality
v
All aspects of memory, parity, statistics counters, and correct serialization
5. A universal port configuration is performed.
6. The links are initialized.
7. The fabric is analyzed. If ports are connected to other fabric elements, the
principal switch in the fabric is identified.
8. The port addresses are assigned. The switch attempts to keep any previously
assigned port addresses.
9. The unicast routing tables are constructed.
10. The port is enabled.
To determine whether a POST has completed without errors, verify that all LEDs
return to a normal state after the POST is complete. If one or more LEDs continue
to flash, see “Interpreting LED activity” on page 25. Verify that the flashing is not
due to the switch being configured to beacon.
Note: The switchBeacon command sets the switch beaconing mode on or off if
the operand is 1 or 0 respectively. When beaconing mode is turned on, the
port LEDs flash orange in a running pattern from port 0 - port 7, port 7 - port
0, and then back to port 7 again.
For more information about beaconing, see the Brocade Fabric OS Procedures
Guide.
Note: When POST completes, verify that the switch prompt displays on a computer
terminal that is connected to the switch. If the prompt does not display, press
the Enter key. If the prompt still does not display, contact IBM.
If errors are detected during a POST, error messages are written to the system
error log. You can view this error log by using the errShow command. For
information about error messages, see the Brocade Diagnostic and System Error
Message Reference.
Running diagnostic tests
Diagnostic tests are provided to help you to identify problems in the hardware and
the firmware. The diagnostic tests include tests of internal connections and circuitry,
fixed media, and any SFP modules and fiber-optic cables that are in use. You can
run the tests either using Telnet or through a terminal that is set up for a serial
connection to the switch. Some tests require that you connect the ports with
Chapter 3. Operating the 3534 Model F08
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