Technical data

Brocade 5000 Hardware Reference Manual 19

Publication Number: 53-1000424-03

Interpreting POST Results

POST is a system check that is performed each time the switch is powered on, rebooted, or reset,

and during which the LEDs flash different colors.

To determine whether POST completed successfully and whether any errors were detected:

- Verify that the LEDs on the switch indicate that all components are healthy (LED patterns

are described in Table 2 on page 3-16). If one or more LEDs do not display a healthy state:

1. Verify that the LEDs are not set to “beacon” (this can be determined through the

switchShow command or Advanced Web Tools). For information about how to turn

beaconing on and off, refer to the Brocade Fabric OS Administrator’s Guide or the

Brocade Web Tools Administrator’s Guide.

2. Follow the recommended action for the observed LED behavior, as listed in

Table 2 on page 3-16.

- Verify that the switch prompt displays on the terminal of a computer workstation that is

connected to the switch.

If the prompt does not display when POST completes, press Enter. If the prompt still does

not display, open another telnet session or access the switch through another

management tool. If this is not successful, the switch did not successfully complete POST;

contact your switch supplier for repair.

- Review the system log for errors.

Any errors detected during POST are written to the system log, which is accessible through

the errShow command. For information about this command, refer to the Brocade Fabric

OS Command Reference. For information about error messages, refer to the Brocade

System Message Reference.

Maintaining the Brocade 5000

The Brocade 5000 does not require any regular physical maintenance and is designed for high

availability and to minimize the chance of failure. It includes diagnostic tests and field-replaceable

units, described in the following sections.

Diagnostic Tests

In addition to POST, Fabric OS includes diagnostic tests to help you troubleshoot the hardware and

firmware. This includes tests of internal connections and circuitry, fixed media, and the

transceivers and cables in use. The tests are implemented by command, either through a telnet

session or through a terminal set up for a serial connection to the switch. Some tests require the

ports to be connected by external cables, to allow diagnostics to verify the serializer/deserializer

interface, transceiver, and cable. Some tests require loop back plugs.

Diagnostic tests are run at link speeds of 1 Gbit/sec, 2 Gbit/sec, and 4 Gbit/sec.

NOTE

Diagnostic tests might temporarily lock the transmit and receive speed of the links during diagnostic

testing.