Checking the LEDs
Enterasys A4 Fast Ethernet Switch Hardware Installation Guide 3-5
Link/Activity LEDs
Table 3-6 describes the status of RJ45 and SFP port LEDs.
Green Solid. System is fully functional. None.
Blinking. Boot-up in process. None.
Table 3-5 CPU LED Definitions
Color State Recommended Action
Table 3-6 Port LED Definitions
Color State Recommended Action
Off No link. None.
No activity or port in standby. None.
Cable is faulty. Replace cable.
Green Solid. Port is linked, but the interface is
not receiving any traffic.
None.
Blinking. Port is linked and traffic is being
received or transmitted by the interface.
None.