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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.
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