Port Leds And Modes - Cisco Catalyst 3850 Hardware Installation Manual

Chapter 1 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.
lists the mode LEDs and their associated port modes and meanings.
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.
the port LED colors in different port modes.
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 1-5
Mode LED Port Mode
STAT
SPEED
DUPLX
ACTV
STACK
PoE
1. Only switches with PoE+ ports.
Table 1-6
Port Mode
STAT
(port status)
OL-26779-02
Port Mode LEDs
Port status
Port speed
Port duplex mode
Active
Stack member status
StackWise port status
1
PoE+ port power
Meaning of Switch LED Colors in Different Modes
Port LED Color
Off
Green
Blinking green Activity. Port is sending or receiving data.
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.
The stack member status.
The StackWise port status. See the
page 1-14.
The PoE+ port status.
Meaning
No link, or port was administratively shut down.
Link present, no activity.
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.
Catalyst 3850 Switch Hardware Installation Guide
Front Panel
Table 1-5
Table 1-6 explains how to interpret
"STACK LED" section on
1-11