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Catalyst 3650 Switch Hardware Installation Guide
OL-29734-01
Chapter 1 Product Overview
Front Panel
Table 1-4
Meaning of Switch LED Colors in Different Modes
Port Mode
Port LED Color
Meaning
STAT
(port status)
Off
No link or port was administratively shut down.
Green
Link present, but 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, Cyclic Redundancy Check (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 because STP checks the switch for possible loops.
SPEED
10/100/1000/2.5G/5G/10G ports
Off
Port is operating at 10 Mb/s.
Green
Port is operating at 100 Mb/s.
Single green
flash (on for
100 ms, off for
1900 ms)
Port is operating at 1000 Mb/s.
Double green
flash
Port is operating at 2.5 Gbps, 5 Gbps, or 10 Gbps link speeds. Use
CLI to determine link speed.
SFP+/QSFP+ ports
Off
Port is not operating.
Blinking green
Port is operating at up to 10 Gb/s.
DUPLX
(duplex)
Off
Port is operating in half duplex.
Green
Port is operating in full duplex.
ACTV
(data active
switch)
Off
The switch is not the active switch.
Note
For a standalone switch, this LED is off.
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.
STACK
(stack member)
Off
No stack member corresponding to that member number.
Blinking green
Stack member number.
Green
Member numbers of other stack member switches.
