Extreme Networks ExtremeRouting SLX 9740 Hardware Installation Manual page 63

Transceivers and Cables Verifying transceiver operation
configured the ports for Ethernet connectivity and connected the cable to another active port, the LED
becomes solid green. When traffic is detected on the port, the light becomes blinking green.
You can also enter the show interface status and show ip interface brief commands
to verify proper transceiver operation.
ExtremeRouting SLX 9740 Hardware Installation Guide 63