Technical data

3-6 Brocade SilkWorm 4100 Hardware Reference Manual

Publication Number: 53-0000563-02

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 3-1 on page 3-3 and Table 3-2 on page 3-5). 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 Procedures Guide or the Brocade

Advanced Web Tools Administrator’s Guide.

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

Table 3-1 on page 3-3 or Table 3-2 on page 3-5.

• 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 Manual. For information about error messages, refer to the Brocade

Diagnostic and System Error Message Reference Manual.

Maintaining the SilkWorm 4100

The SilkWorm 4100 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.