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Switch LEDs
3
Only switches with PoE+ ports.
Table 27: 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)
Uplink ports
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 9200 Series Switches Hardware Installation Guide
For a standalone switch, this LED is off.
Switch LEDs
83
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