Cisco Systems 4900M manual Led, Color or State Description

Chapter 1 Product Overview

Switch Components

The LEDs on the front and rear panel of the Catalyst 4900M switch (see

Figure 1-5and Figure 1-6) provide status information as follows:

•System LED indicates the operating state of the Catalyst 4900M switch.

•PS1 LED indicates the internal power supply status.

•PS2 LED indicates the internal power supply status.

•FAN LED indicates the fan tray status.

•A link status LED is below the 10-GB uplink ports.

A description of the LED functions is provided in Table 1-1.

Table 1-1	LED Descriptions
LED	Color or State	Description
System		At startup, the Catalyst 4900M performs a
(front)		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
(rear)		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	10/100/1000BASE-T Management port is in
(rear)		link-up state
	Off	10/100/1000BASE-T Management port is in
		link-down state or not connected
		There are no blinking, red, or yellow states
		for this port

	Cisco Catalyst 4900M Switch Installation Guide
1-10	78-18350-01