Technical data

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DIAGNOSTICS
Overview
The 2250 switch model is designed for maintenance-free operation, and
contains self-diagnostic capabilities that provide switch status and
operating statistics. In the case of a failure, the self-diagnostics aid in
isolating the problem.
Each 2250 switch has the following loopback paths incorporated into the
switch hardware:
• An internal loopback path test that checks internal Fibre Channel port
logic functions, and the paths between the interfaces and central
memory.
• An external loopback path test that checks installed fiber optic cables
and port fault isolation in cross-port configurations, and also checks the
main board, fixed media, and the GBIC module in each port. This test
requires ports to be connected by external cables.