Installation guide

Boot
In addition to POST, boot includes the following tasks after POST is complete:
1. Perform universal port configuration
2. Initialize links
3. Analyze fabric. If any ports are connected to other Extension Switches, the Extension Switch
participates in a fabric configuration
4. Obtain a domain ID and assigning port addresses
5. Construct unicast routing tables
6. Enable normal port operation
Interpreting POST results
POST is a system check that is performed each time the Brocade 7800 is powered on, rebooted, or
reset, and during which the LEDs flash different colors.
Perform the following steps to determine whether POST completed successfully and whether any
errors were detected.
1. Verify that the LEDs on the switch indicate that all components are healthy (LED patterns are
described in LEDs on the port side of the Extension Switch on page 33 and LEDs on the nonport
side of the Brocade 7800 on page 37). If one or more LEDs do not display a healthy state:
a) Verify that the LEDs are not set to "beacon" (this can be determined through the
switchShow command or Web Tools). For information about how to turn beaconing on
and off, see the Fabric OS Administrator's Guide or the Web Tools Administrator's Guide.
b) Follow the recommended action for the observed LED behavior, as listed in LEDs on the
port side of the Extension Switch on page 33 or LEDs on the nonport side of the Brocade
7800 on page 37.
2. Verify that diagShow command displays that the diagnostic status for all ports in the switch is OK.
3. Review the system log for errors. Errors detected during POST are written to the system log, which
is viewed using the errShow command. For more information about this command, see the Fabric
OS Command Reference. For information about specific error messages, see the Fabric OS
Message Reference.
Brocade 7800 maintenance
The Brocade 7800 are 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.
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 Extension Switch. Some tests require the ports to be
Boot
38 Brocade 7800 Extension Switch Hardware Installation Guide
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