Interfaces and LED behavior




1 System status LED 4 1/10/25G SFP28 ports (1-16)
2 PSU status LED 5 10/25G SFP28 ports (17-48)
3 Fan status LED 6 40/100G QSFP28 ports (49-56)




1 Serial management port 5 AC Power Connector (with Plug Retainer)
2 Ethernet management port 6 PSU status LED
3 PSU1 7 Hot swappable fan module
4 PSU2 8 Fan LED


LED function LED state Description
System status LED Green System operating normally
Blinking green System booting
Red System fault
PSU status LED Green PSU operating normally
Red PSU fault
Off No PSU installed
Fan status LED Green Fan operating normally
Red Fan fault: check rear of unit to see which fan is faulty
Off No fan installed
SFP28/QSFP28 port LED Green 100G link
Blinking green 100G activity
White 50G link
Blinking white 50G activity
Amber 40G link
Blinking amber 40G activity
Blue 25G link
Blinking blue 25G activity
Purple 1G or 10G link
Blinking purple 1G or 10G activity







1 System status LED 3 40/100G QSFP28 ports (49-56)
2 10/25G SFP28 ports (1-48)




1 Serial management port 5 AC Power Connector (with Plug Retainer)
2 Ethernet management port 6 PSU status LED
3 PSU1 7 Hot swappable fan module
4 PSU2 8 Fan LED


LED function LED state Description
System status LED Green System operating normally
Blinking green (0.5 Hz) Bootloader execution
Blinking green (4 Hz) BIOS ready
Amber One of the PSUs is unpowered or caution event (ex: one FAN fail in OS)
Red Thermal trip or critical event (ex: two or more FANs fail in OS)
PSU status LED Green PSU operating normally
Blinking green PSU in standby mode
Amber PSU fault
Off AC cable not connected
Fan status LED Green Fan operating normally
Red Fan fault
Off Not connected
QSFP28 100G/40G mode status LED Green 100G link
Blinking green 100G activity
Amber 40G link
Blinking amber 40G activity
QSFP28 split out 25G mode status LED Green 25G link
Blinking green 25G activity
QSFP28 split out 10G mode status LED Amber 10G link
Blinking amber 10G activity
SFP28 25G mode status LED Green 25G link
Blinking green 25G activity
SFP28 10G mode status LED Amber 10G link
Blinking amber 10G activity







1 System status LED 6 QSFP28 port activity LED
2 Fan status LED 7 Serial management port
3 PSU1 status LED 8 Ethernet management port
4 PSU2 status LED 9 USB port
5 QSFP28 ports (1–32) 10 E1/33 time sync SFP port (1G)




1 PSU1 5 Hot swappable fan module
2 PSU2 6 Fan module screw
3 AC power connector (with plug retainer) 7 Fan status LED
4 PSU status LED


LED function LED state Description
System status LED Green System is functioning properly
Orange System warning
Fan status LED Off Fans not initialized
Green Fans operating normally
Orange Fan fault: check the back of the unit to see which fan is the faulty one
PSU1/PSU2 status LED Off Power is not supplied to the device
Green PSU is operating normally
Orange Signal issues:
- PSU is present, but no current is supplied
- Fan Lock
- OTP: Over temperature Protection
- OCP: Over Current Protection
- OVP: Over Voltage Protection
- UVP: Under Voltage Protection
QSFP28 port LED Off No link
Green 100G link
Blinking Green 100G activity
Yellow 40G link
Blinking Yellow 40G activity







1 System status LED 6 QSFP28 port activity LED
2 Fan status LED 7 Serial management port
3 PSU1 status LED 8 Ethernet management port
4 PSU2 status LED 9 USB port
5 QSFP28 ports (1–64) 10 E1/65 time sync SFP port (1G)




1 PSU1 4 PSU status LED
2 PSU2 5 Hot swappable fan module
3 AC power connector (with plug retainer) 6 Fan status LED


LED function LED state Description
System status LED Green System is functioning properly
Orange System warning
Fan status LED Off Fans not initialized
Green Fans operating normally
Orange Fan fault: check the back of the unit to see which fan is the faulty one
PSU1/PSU2 status LED Off Power is not supplied to the device
Green PSU is operating normally
Orange Signal issues:
- PSU is present, but no current is supplied
- Fan Lock
- OTP: Over temperature Protection
- OCP: Over Current Protection
- OVP: Over Voltage Protection
- UVP: Under Voltage Protection
QSFP28 port LED Off No link
Green 100G link
Blinking Green 100G activity
Yellow 40G link
Blinking Yellow 40G activity







1 PSU status LED 6 QSFP-DD port status LED
2 Fan status LED 7 QSFP-DD port number
3 Power status LED 8 Ethernet management port
4 System status LED 9 Serial management port
5 QSFP-DD ports (1–32) 10 USB port




1 PSU1 5 PSU release latch
2 PSU2 6 Hot swappable fan module
3 AC power connector (with plug retainer) 7 Fan module release latch
4 PSU status LED


LED function LED state Description
System status LED Green System is functioning properly
Amber System fault/initial
Blinking Green/Amber Attention
Fan status LED Off No power
Green Fans operating normally
Amber Fan fault: check the back of the unit to see which fan is the faulty one
Power status LED Off No power
Green Power OK
PSU status LED Off No power
Green Power OK
Blinking Green Standby
Amber PSU fault
Blinking Amber PSU warning
QSFP-DD port LED Off No link
White Link up
  • Last modified: December 3, 2024