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3
Interpreting POST results
5. Constructs unicast routing tables.
6. Enables normal port operation.
Interpreting POST results
POST is a system check that is performed each time the switch is powered on, rebooted, or reset.
During POST, the LEDs flash either amber or green. Any errors that occur during POST are listed in
the error log.
Complete the following steps to determine whether POST completed successfully and whether any
errors were detected.
1. Verify that the switch LEDs indicate that all components are healthy.
2. Verify that the switch prompt displays on the terminal of a computer workstation connected to
3. Review the switch system log for errors. Any errors detected during POST are written to the
For information about all referenced commands, and on accessing the error log, refer to the Fabric
OS Administrator's Guide. For information about error messages, refer to the Fabric OS Message
Reference Manual.
PowerConnect B-8000 Maintenance
The PowerConnect B-8000 is designed for high availability and low failure; it does not require any
regular physical maintenance. It includes diagnostic tests and field-replaceable units, described in
the following sections.
Installing an SFP or SFP+
The PowerConnect B-8000 only supports Brocade-branded SFP and SFP+ optical transceivers. For
the Fibre Channel connections, the PowerConnect B-8000 uses SFP and SFP+ transceivers that
support any combination of Short Wavelength (SWL) and Long Wavelength (LWL) optical media. For
its CEE connections, the PowerConnect B-8000 uses SFP+ transceivers that support either optical
or Brocade-branded active twinax copper cables. The optical SFP+ transceivers support both SR
(Short Reach) and LR (Long Reach) modules. Twinax cables support distances of 1 meter, 3
meters, and 5 meters.
If you use an unqualified transceiver, the switchShow command output (for the FC ports) shows the
port in a Mod_Inv state. Fabric OS also logs the issue in the system error log. For the GbE ports, use
the cmsh command.
20
See
Table 1
and
Table 2
for descriptions and interpretations of LED patterns. If one or more
LEDs do not display a healthy state, verify that the LEDs on the switch are not set to "beacon"
by entering the switchShow command to detect if beaconing is active.
the switch.
If there is no switch prompt when POST completes, press Enter. If the switch prompt still does
not display, try opening a Telnet session or accessing the switch through another management
tool. If this is not successful, the switch did not successfully complete POST. Contact your
switch supplier for repair.
system log, accessible through the errShow command.
PowerConnect B-8000 Hardware Reference Manual
53-1001788-01
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