3Com 3C16986A manual Managing, Guide, Network. For information on managing the Switch using

34CHAPTER 2: INSTALLING THE SWITCH

Solving Problems If the LEDs on the Switch indicate a problem, refer to Table 6 which

Indicated by LEDs contains a list of problems and suggested solutions.

Table 6 Problems indicated by LEDs

Problem Suggested Solution

A Power LED does not Check that the power cable is firmly connected to the

lightrelevant Switch unit and to the supply outlet. If the connection is secure and there is still no power, you may have a faulty power cord.

On powering-up, the Power/Self Test LED lights yellow and a Unit LED lights green

The relevant Switch unit has failed its Power On Self Test (POST) because of an internal problem. Contact your supplier for advice.

A link is connected and yet the Status LED for the port does not light

Check that:

■All connections are secure.

■The devices at both ends of the link are powered-up.

■The connection uses cross-over cable if you are linking a 10BASE-T or 100BASE-TX port with a device that is MDIX-only.

	For information about solving problems when managing the Switch, refer
	to the Problem Solving chapter in the “SuperStack Switch Management
	Guide”.
Managing the	The Switch contains software that allows you to change and monitor the
Switch	way it works. This management software is not required to get the
	Switch working, but if you do use it, you may improve the efficiency of
	the Switch and therefore improve the overall performance of your
	network. For information on managing the Switch using the
	management software, refer to the “SuperStack Switch Management
	Guide”.