Online Diagnostics
The switch running Cisco IOS has many levels of online diagnostic capabilities. The online diagnostics are
divided into four categories:
• Bootup—Bootup diagnostics automatically run during bootup, module OIR, or switchover to a backup
supervisor engine.
• Background health—Monitoring diagnostic tests are continuously run by the system to monitor system
health.
• On-demand online diagnostics—On-demand online diagnostics can be used to run any test from the
CLI. You can also run on-demand online diagnostics to perform a sanity check on the system hardware.
Some of these tests are disruptive and will impact traffic flow.You must follow the on-demand diagnostic
guidelines exactly to avoid false failures.
• Scheduled diagnostics—Scheduled diagnostics can be used to run any of the above tests at user-designated
intervals.
For complete information on the online diagnostic tests and how to run them, refer to the software configuration
guide.
Catalyst 6880-X Switch Hardware Installation Guide
34 OL-30827-02
Installing the Switch
Online Diagnostics
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