Installation Guide
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... LED STATUS Color or State Green Description At startup, the switch performs a series of diagnostic tests: All tests pass Red A test other than an individual port test fails Flashing System boot or diagnostic tests in progress Yellow System is in rommon mode or a power supply has failed CON MGT Port 1-...Port is operational Port is disabled by user Power-on self-test indicates faulty port No signal detected or link configuration failure 1-10 Catalyst 4900 Series Switch Installation Guide 78-18039-02 Switch Components Chapter 1 Product Overview Table 1-1 describes LED functions.
... LED STATUS Color or State Green Description At startup, the switch performs a series of diagnostic tests: All tests pass Red A test other than an individual port test fails Flashing System boot or diagnostic tests in progress Yellow System is in rommon mode or a power supply has failed CON MGT Port 1-...Port is operational Port is disabled by user Power-on self-test indicates faulty port No signal detected or link configuration failure 1-10 Catalyst 4900 Series Switch Installation Guide 78-18039-02 Switch Components Chapter 1 Product Overview Table 1-1 describes LED functions.