Install Guide

LED Description
• Solid yellow—Critical system error
• Blinking yellow—Noncritical system error, fan failure, or power
supply failure
Power LED
• O—No power
• Solid Green—Normal operation
• Solid yellow—POST is in process
• Blinking yellow—Power supply failed
Master LED
• O—Switch is in Stacking Slave mode
• Solid green—Switch is in Stacking Master or Standalone mode
FAN LED
• O—No power
• Solid green—Normal operation; fan powered and running at the
expected RPM
• Solid yellow—Fan failed—including incompatible airow
direction when you insert the PSU or fan trays with diering
airows
PSU LED
• O—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
• O—Locator function disabled
• Blinking blue—Locator function enabled
7-Segment LED for stacking
• O—No power
• Solid green—Hex digit representing the stack unit ID
RJ-45 Ethernet Port LED
• O—no link and no activity detected
• On—Activity on the port
• Solid yellow—10MHz activity
• Solid green—100MHz activiity
• Blinking green—1GHz activity
Table 2. System management Ethernet port LEDs
LED Description
Link LED
• O—No link
• Solid green—Link operating at a maximum speed,
autonegotiated/forced or 1G
• Solid yellow—Link operating at a lower speed, autonegotiated/
forced or 10/100M
Port activity LED
• O—No link
10 S5148F-ON switch