LED
Description
Master LED
•
Off—Switch is in Stacking Slave mode
•
Solid green—Switch is in Stacking Master or Standalone mode
FAN LED
•
Off—No power
•
Solid green—Normal operation; fan powered and running at the
expected RPM
•
Solid yellow—Fan failed—including incompatible airflow
direction when you insert the PSU or fan trays with differing
airflows
PSU LED
•
Off—No power
•
Solid green—Normal operation
•
Solid yellow—Power supply critical event causing a shutdown.
•
Blinking yellow—PSU warning event; power continues to
operate
•
Blinking green, 1.0Hz—Standby mode
•
Blinking green, 0.5Hz—Ac power cord unplugged
Locator LED/System Beacon
•
Off—Locator function is disabled
•
Blinking blue—Locator function is enabled
7-Segment LED for stacking
•
Off—No power
•
Solid green—Hex digit representing the stack unit ID
RJ-45 Ethernet LED
•
Off—no link and no activity detected
•
On—Activity on the port
•
Solid yellow—10MHz activity
•
Solid green—100MHz activiity
•
Blinking green—1GHz activity
Table 4. System management Ethernet port LEDs
LED
Description
Link LED
•
Off—No link
•
Solid green—Link operating at a maximum speed—
autonegotiated/forced or 1G port
•
Solid yellow—Link operating at a lower speed—
autonegotiated/forced or 10/100M port
Activity LED
•
Off—No link
•
Flashing green—Port activity
Table 5. SFP+ and unified SFP+ port LEDs
LED
Description
Link LED
•
Off—No link
•
Solid green—Link operating at maximum speed—10G port
•
Solid yellow—Link operating at a lower speed—1G port
12
S4100–ON Series switch
