Cisco Systems 4900 Series manual Led, Color or State Description

Chapter 1 Product Overview

Switch Components

Table 1-1describes LED functions.

Table 1-1	LED Functions
LED	Color or State	Description
STATUS		At startup, the switch performs a series of
		diagnostic tests:
	Green	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
	Off	Switch is disabled
CON	Green	10/100 BASE-T console port is in link-up
		state
	Off	10/100 BASE-T console port is in link-down
		state or not connected
		There are no blinking, red, or yellow states
		for this port
MGT	Green	10/100 BASE-T Management port is in
		link-up state
	Off	10/100 BASE-T Management port is in
		link-down state or not connected
		There are no blinking, red, or yellow states
		for this port
Port 1-48	Green	Port is operational
	Yellow	Port is disabled by user
	Flashing yellow	Power-on self-test indicates faulty port
	Off	No signal detected or link configuration
		failure

	Catalyst 4900 Series Switch Installation Guide
1-10	78-18039-02