Brocade 7800 Extension Switch Hardware Reference Manual - Manual (Page 38)

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
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-Gbps, 2-Gbps, 4-Gbps, and 8-Gbps. For information about
specific diagnostic tests, see the Fabric OS Administrator's Guide.
NOTE
Diagnostic tests might temporarily lock the transmit and receive speed of the links during diagnostic
testing. Brocade recommends that you power-cycle the switch after completing offline diagnostics
tests.
Field replaceable units (FRUs)
You can replace the combined power supply/fan assemblies on site without the use of special tools.
The FRUs are keyed to ensure correct orientation during installation. Replacement instructions are
provided with all replacement units ordered.
DANGER
Remove both power cords before servicing.
DANGER
Disconnect the power cord from all power sources to completely remove power from the
device.
Power supplies/fan assemblies
The two FRUs are hot-swappable. They are identical and fit into either bay. They are keyed to prevent
being inserted upside down.
Fabric OS identifies the power supplies as follows (viewing the Brocade 7800 from the nonport side):
• Power supply #1 on the right
• Power supply #2 on the left
Fabric OS identifies the fan assemblies as follows (viewing the Brocade 7800 from the nonport side):
• Fan assembly #1 on the right
• Fan assembly #2 on the left
Brocade 7800 maintenance
38 Brocade 7800 Extension Switch Hardware Reference Manual
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