Port Leds And Modes - Cisco Catalyst 9300 Series Hardware Installation Manual

Product Overview

Port LEDs and Modes

Each Ethernet port, 1-Gigabit Ethernet module slot, and 10-Gigabit Ethernet module slot has a port LED.
These port LEDs, as a group or individually, display information about the switch and about the individual
ports. The port mode determines the type of information shown by the port LEDs.
To select or change a mode, press the Mode button until the desired mode is highlighted. When you change
port modes, the meanings of the port LED colors also change.
When you press the Mode button on any switch in the switch stack, all the stack switches change to show the
same selected mode. For example, if you press the Mode button on the active switch to show the SPEED
LED, all the other switches in the stack also show the SPEED LED.
Table 9: Port Mode LEDs
Mode LED
STAT
SPEED
DUPLX
ACTV
STACK
PoE
2
Table 10: Meaning of Switch LED Colors in Different Modes
Port Mode
STAT (port status)
Port Mode
Port status
Port speed
Port duplex mode
Active
Stack member status
StackWise port status
2
The PoE+ port status.
Only switches with PoE+ ports.
Port LED Color
Off
Green
Blinking green
Alternating green-amber
Amber
Description
The port status. This is the default mode.
The port operating speed: 10, 100, or 1000 Mb/s.
The port duplex mode: full duplex or half duplex.
The active switch status.
Stack member status.
The StackWise port status. See
The PoE+ port status.
Meaning
No link, or port was administratively shut down.
Link present, no activity.
Activity. Port is sending or receiving data.
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.
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.
Cisco Catalyst 9300 Series Switches Hardware Installation Guide
Port LEDs and Modes
STACK LED, on page 8.
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