Cisco Catalyst 9300 Series Hardware Installation Manual page 27

Product Overview
Table 11: Meaning of Switch LED Colors in Different Modes
Port Mode
STAT (port status)
SPEED
DUPLX (duplex)
ACTV (data active
switch)
Port LED Color Meaning
Off No link, or port was administratively shut down.
Green Link present, no activity.
Blinking green Activity. Port is sending or receiving data.
Alternating green-amber Link fault. Error frames can affect connectivity, and errors
such as excessive collisions, CRC errors, and alignment
and jabber errors are monitored for a link-fault indication.
Amber Port is blocked by Spanning Tree Protocol (STP) and is
not forwarding data.
After a port is reconfigured, the port LED can be amber
for up to 30 seconds as STP checks the switch for possible
loops.
10/100/1000/SFP ports
Off Port is operating at 10 Mb/s.
Green Port is operating at 100 Mb/s.
Single green flash (on for Port is operating at 1000 Mb/s.
100 ms, off for 1900 ms)
Blinking twice Port is operating at 2500, 5000 or 10000 Mb/s
Network module slots
Port is not operating.
Off
Blinking green Port is operating at up to 10 Gb/s.
Off Port is operating in half duplex.
Green Port is operating in full duplex.
The switch is not the active switch.
Off
Note
Green The switch is the active switch.
Amber Error during active switch election.
Blinking green Switch is a standby member of a data stack and assumes
active responsibilities if the current active switch fails.
Cisco Catalyst 9300 Series Switches Hardware Installation Guide
Port LEDs and Modes
For a standalone switch, this LED is off.
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