14 CHAPTER 1: INTRODUCING THE SWITCH 610
LEDs Tab l e 3 lists the LEDs visible on the front of the Switch, and their states according to color. For information on using the LEDs f or problem solving, see “Checking for Correct Operation” on page 24.

Tab le 3 LED behavior

LED Color Indicates
Port Status LEDs
Packet Yellow Packets are being transmitted/received on the port.
Off No packets are being transmitted/received on the port.
Status Green A link is present, and the port is enabled.
Green flashing A link is present, but the port is disabled.
Off No link is present.
Power/Self Test LED
Green The Switch is powered-up.
Green flashing The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
Yellow The Switch has failed its Power On Self Test.
Off The Switch is not receiving power.
16954ua.book Page 14 Friday, April 30, 1999 9:39 AM