Status
Color
LED
Time core is synchronized to an external source including
IEEE1588.
Green
SYNC
System is in Synchronous Ethernet mode.
Flashing Green
Acquiring state or Holdover: Time core is in acquiring
state or holdover mode.
Amber
Time core clock synchronization is disabled or in
free-running state.
Off
GNSS is not configured.
Off
GNSS
GNSS Normal State. Self-survey is complete.
Green
Power up. GNSS is not tracking any satellite.
Red
Auto holdover.
Amber
Learning state–normal. Self-survey is not completed.
Flashing Green
System Fans LED
Cisco N540-24Q8L2DD-SYS has six fans at the back panel.
Table 9: Fan Assembly LED Descriptions
Status
Color
LED
Fans are operating normally.
Green
STATUS
Single fan failure.
Amber
More than one fan failure or a single PSU fan failure.
Red
Fan tray is not receiving power.
Off
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
66
Appendix
System Fans LED