Appendix B Troubleshooting; Leds - Extreme Networks ExtremeWare XOS Guide Manual

B
Troubleshooting
If you encounter problems when using the switch, this appendix may be helpful. If you have a problem
not listed here or in the release notes, contact your local technical support representative.

LEDs

Power LED does not light:
Check that the power cable is firmly connected to the device and to the supply outlet.
On powering-up, the MGMT LED lights yellow:
The device has failed its Power On Self Test (POST) and you should contact your supplier for advice.
A link is connected, but the Status LED does not light:
Check that:
• All connections are secure.
• Cables are free from damage.
• The devices at both ends of the link are powered-up.
• Both ends of the Gigabit link are set to the same autonegotiation state.
The Gigabit link must be enabled or disabled on both sides. If the two sides are different, typically
the side with autonegotiation disabled will have the link LED lit, and the side with autonegotiation
enabled will not be lit. The default configuration for a Gigabit port is autonegotiation enabled. This
can be verified by entering the following command:
show port configuration
On power-on, some I/O modules do not boot:
Check if you are using 110V power input. The BlackDiamond switch powers only up to four modules if
it is connected to a 110V outlet.
Error LED on the MSM turns amber:
Check the syslog message for a "critical" software errors.
ExtremeWare XOS 10.1 Concepts Guide 235