Downlink Port Data LEDs
RJ-45 ports have port LEDs. These LEDs, as a group or individually, provide information about the switch
and about the individual ports.
DescriptionColor
No link or port was administratively shut down.Off
Link present but is not sending or receiving data.Green
Activity. Port is sending or receiving data.Blinking green
Link fault. Error frames can affect connectivity, and errors such as excessive
collisions, CRC errors, and alignment and jabber errors are monitored for link
faults.
Blinking green-amber
Port is blocked by Spanning Tree Protocol (STP) and is not forwarding data.
After a port is reconfigured, the port LED is amber for up to 30 seconds as
STP searches for loops.
Amber
Downlink Port PoE LEDs
DescriptionColor
PoE is not enabled.Off
PoE is enabled. Ports are functioning correctly.Green
•
PoE port has been denied power.
•
PoE port has a PoE fault.
Blinking amber
Uplink Port Data LEDs
DescriptionLED Color
No link or port was administratively shut down.Off
Catalyst Digital Building Series Switch Hardware Installation Guide
8
Product Overview
LEDs
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