IBM 2498B24 - System Storage SAN24B-4 Switch, Installation, Service And User Manual

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Ethernet LED patterns
Each Ethernet port has two LEDs, which are described in Table 7
Table 7. Ethernet LED patterns
LED name LED color Status of hardware
Recommended
action
Ethernet speed LED
(right) No light Port speed is 10
Mb/sec. No action is required.
Steady green Port speed is 100
Mb/sec. No action is required.
Ethernet link status
LED (left) No light No link detected Verify the Ethernet
cable is connected
correctly.
Blinking amber There is link activity
(traffic). No action is required.
Solid Amber There is a link. No action is required.
POST and boot specifications
When the switch is turned on or rebooted, the switch performs POST. Total boot
time with POST is up to 3 minutes. POST can be omitted after subsequent reboots
by using the
fastboot command or entering the diagDisablePost command to
persistently disable POST.
For more information about these commands, refer to the Fabric OS Command
Reference Manual .
POST
The success or failure results of the diagnostic tests that run during POST can be
monitored through the error log or the command line interface.
POST includes the following steps:
1. Preliminary POST diagnostics are run.
2. Operating system is initialized.
3. Hardware is initialized.
4. Diagnostic tests are run on several functions, including circuitry, port
functionality, memory, statistics counters, and serialization.
Boot
In addition to POST, boot includes the following steps after POST is complete:
1.
Universal port configuration is performed.
2. Links are initialized.
3. Fabric is analyzed, and if any ports are connected to other switches, the switch
participates in a fabric configuration.
4. Switch obtains a domain ID and assigns port addresses.
5. Unicast routing tables are constructed.
6. Normal port operation is enabled.
Chapter 3. Operating the switch
25
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