CIS Catalyst 3850 Series User manual

Product Overview
The Catalyst 3850 family of switches are Ethernet switches to which you can connect devices such as Cisco
IP Phones, Cisco Wireless Access Points, workstations, and other network devices such as servers, routers,
and other switches.
The Catalyst 3850 switches support stacking through Cisco StackWise-480 technology and power management
through StackPower. The StackWise technology for the Catalyst 3850 switches is called StackWise-480.
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
This chapter contains these topics:
•Switch Models, on page 1
•Front Panel, on page 6
•Rear Panel, on page 22
•Management Options, on page 31
Switch Models
Table 1: Catalyst 3850 Switch Models and Descriptions
DescriptionSupported Software ImageSwitch Model
Stackable 24 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
LAN BaseWS-C3850-24T-L
Stackable 48 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
LAN BaseWS-C3850-48T-L
Stackable 24 10/100/1000 PoE+2
ports, 1 network module slot, 715
W power supply
LAN BaseWS-C3850-24P-L
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 715
W power supply
LAN BaseWS-C3850-48P-L
Product Overview
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DescriptionSupported Software ImageSwitch Model
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 1100
W power supply
LAN BaseWS-C3850-48F-L
Stackable 24 10/100/1000 Cisco
UPOE3ports, 1 network module
slot, 1100 W power supply
LAN BaseWS-C3850-24U-L
Stackable 48 10/100/1000 Cisco
UPOE ports, 1 network module
slot, 1100 W power supply
LAN BaseWS-C3850-48U-L
Stackable 12
100M/1G/2.5G/5G/10G and 36 1G
UPoE ports, 1 network module slot,
1100 W power supply
LAN BaseWS-C3850-12X48U-L
Stackable 24
100M/1G/2.5G/5G/10G UPoE
ports, 1 network module slot,
1100-W power supply
LAN BaseWS-C3850-24XU-L
Stackable 24 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
IP BaseWS-C3850-24T-S
Stackable 48 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
IP BaseWS-C3850-48T-S
Stackable 24 10/100/1000 PoE+
ports, 1 network module slot, 715
W power supply
IP BaseWS-C3850-24P-S
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 715
W power supply
IP BaseWS-C3850-48P-S
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 1100
W power supply
IP BaseWS-C3850-48F-S
Stackable 24 10/100/1000 Cisco
UPOE ports, 1 network module
slot, 1100 W power supply
IP BaseWS-C3850-24U-S
Stackable 48 10/100/1000 Cisco
UPOE ports, 1 network module
slot, 1100 W power supply
IP BaseWS-C3850-48U-S
Catalyst 3850 24-port PoE IP Base
with 5 access points license
IP BaseWS-C3850-24PW-S
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Product Overview
Switch Models

DescriptionSupported Software ImageSwitch Model
Catalyst 3850 48-port PoE IP Base
with 5 access points license
IP BaseWS-C3850-48PW-S
Stackable 12 SFP module slots, 1
network module slot, 350 W power
supply
IP BaseWS-C3850-12S-S
Stackable 24 SFP module slots, 1
network module slot, 350 W power
supply
IP BaseWS-C3850-24S-S
Catalyst 3850 12-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 350
W power supply
IP BaseWS-C3850-12XS-S
Catalyst 3850 16-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 350
W power supply.
16 ports are available when the
C3850-NM-4-10G network module
is plugged into the
WS-C3850-12XS-S switch.
IP BaseWS-C3850-16XS-S
Catalyst 3850 24-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 715
W power supply.
IP BaseWS-C3850-24XS-S
Catalyst 3850 32-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 715
W power supply.
32 ports are available when the
C3850-NM-8-10G network module
is plugged into the
WS-C3850-24XS-S switch.
IP BaseWS-C3850-32XS-S
Catalyst 3850 switch with SFP+
transceivers, 48 ports that support
up to 10 G, and 4 QSFP ports that
support up to 40 G. 750 W power
supply.4
The airflow direction for this switch
is from the front panel to the rear
panel.
IP BaseWS-C3850-48XS-S
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Product Overview
Switch Models

DescriptionSupported Software ImageSwitch Model
Catalyst 3850 switch with SFP+
transceivers, 48 ports that support
up to 10 G, and 4 QSFP ports that
support up to 40 G. 750 W power
supply.
The airflow direction for this switch
is from the rear panel to the front
panel.
IP BaseWS-C3850-48XS-F-S
Stackable 12
100M/1G/2.5G/5G/10G and 36 1
G UPoE ports, 1 network module
slot, 1100 W power supply
IP BaseWS-C3850-12X48U-S
Stackable 12
100M/1G/2.5G/5G/10G and 36 1
G UPoE ports, 1 network module
slot, 1100 W power supply
IP BaseWS-C3850-12X48UW-S
Stackable 24
100M/1G/2.5G/5G/10G UPoE
ports, 1 network module slot,
1100-W power supply
IP BaseWS-C3850-24XU-S
Stackable 24
100M/1G/2.5G/5G/10G UPoE
ports, 1 network module slot,
1100-W power supply
IP BaseWS-C3850-24XUW-S
Stackable 24 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
IP ServicesWS-C3850-24T-E
Stackable 48 10/100/1000 Ethernet
ports, 1 network module slot, 350
W power supply
IP ServicesWS-C3850-48T-E
Stackable 24 10/100/1000 PoE+
ports, 1 network module slot, 715
W power supply
IP ServicesWS-C3850-24P-E
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 715
W power supply
IP ServicesWS-C3850-48P-E
Stackable 48 10/100/1000 PoE+
ports, 1 network module slot, 1100
W power supply
IP ServicesWS-C3850-48F-E
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Product Overview
Switch Models

DescriptionSupported Software ImageSwitch Model
Stackable 24 10/100/1000 Cisco
UPOE ports, 1 network module
slot, 1100 W power supply
IP ServicesWS-C3850-24U-E
Stackable 48 10/100/1000 Cisco
UPOE ports, 1 network module
slot, 1100 W power supply
IP ServicesWS-C3850-48U-E
Stackable 12 SFP module slots, 1
network module slot, 350 W power
supply
IP ServicesWS-C3850-12S-E
Stackable 24 SFP module slots, 1
network module slot, 350 W power
supply
IP ServicesWS-C3850-24S-E
Catalyst 3850 12-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 350
-W power supply.
IP ServicesWS-C3850-12XS-E
Catalyst 3850 16-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 350
W power supply.
16 ports are available when the
C3850-NM-4-10G network module
is plugged into the
WS-C3850-12XS-E switch.
IP ServicesWS-C3850-16XS-E
Catalyst 3850 24-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 715
W power supply.
IP ServicesWS-C3850-24XS-E
Catalyst 3850 32-port SFP+
transceiver, 1 network module slot,
support for up to 10 G SFP+, 715
W power supply.
32 ports are available when the
C3850-NM-8-10G network module
is plugged into the
WS-C3850-24XS-E switch.
IP ServicesWS-C3850-32XS-E
Product Overview
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Product Overview
Switch Models

DescriptionSupported Software ImageSwitch Model
Catalyst 3850 switch with SFP+
transceivers, 48 ports that support
up to 10 G, and 4 QSFP ports that
support up to 40 G. 750 W power
supply.
The airflow direction for this switch
is from the front panel to the rear
panel.
IP ServicesWS-C3850-48XS-E
Catalyst 3850 switch with SFP+
transceivers, 48 ports that support
up to 10 G, and 4 QSFP ports that
support up to 40 G. 750 W power
supply.
The airflow direction for this switch
is from the rear panel to the front
panel.
IP ServicesWS-C3850-48XS-F-E
Stackable 12
100M/1G/2.5G/5G/10G and 36 1
G UPoE ports, 1 network module
slot, 1100 W power supply
IP ServicesWS-C3850-12X48U-E
Stackable 24
100M/1G/2.5G/5G/10G UPoE
ports, 1 network module slot,
1100-W power supply
IP ServicesWS-C3850-24XU-E
1For supported network modules, see Network Modules, on page 11 .
2PoE+ = Power over Ethernet plus (provides up to 30 W per port).
3UPOE = Universal Power Over Ethernet (provides up to 60 W Cisco UPOE per port)
4The WS-C3850-48XS switches do not support StackWise-480
Front Panel
This section describes the front panel components:
• 24 or 48 downlink ports of one of these types:
• 10/100/1000
• 10/100/1000 PoE+
• 10/100/1000 Cisco UPoE
• 10 G SFP+
• 12 or 24 SFP or SFP+ module downlink slots
• Uplink network modules slot
• USB Type A connector
• USB mini-Type B (console) port
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Product Overview
Front Panel

• LEDs
• Mode button
All of the switches have similar components. See the following illustrations for examples.
The Catalyst 3850 switches might have slight cosmetic differences on the bezels.
Note
Figure 1: WS-C3850-48P-L Switch Front Panel
USB mini-Type B
(console) port
4Mode button1
10/100/1000 PoE+ ports5Status LEDs2
Network module6USB Type A storage port3
Figure 2: WS-C3850-24S Switch Front Panel
The WS-C3850-12S switches have similar front panels.
Note
USB Type A storage port5UID button1
SFP module slots
(downlink)
6Mode button2
Network module7Status LEDs3
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Product Overview
Front Panel

USB mini-Type B
(console) port
4
Figure 3: WS-C3850-24XS-E Switch Front Panel
The WS-C3850-24XS-E switches have the following components.
Note
USB mini-Type B
(console) port
4Mode button1
10 G SFP+ ports5Status LEDs2
Network module6USB Type A storage port3
10/100/1000 Ports
The 10/100/1000 ports use RJ-45 connectors with Ethernet pinouts. The 10BASE-T, 100BASE-TX,
1000BASE-T traffic requires Category 5 or Category 5e twisted pair (UTP) cable. The 10BASE-T traffic can
use Category 3 or Category 4 UTP cable.
PoE, PoE+, and Cisco UPoE Ports
The PoE+ and Cisco Universal Power Over Ethernet (Cisco UPoE) ports use the same connectors as described
in 10/100/1000/Multigigabit Ethernet Port Connections. They provide:
• PoE+ ports: Support for IEEE 802.3af-compliant powered devices (up to 15.4 W PoE per port) and
support for IEEE 802.3at-compliant powered devices (up to 30 W PoE+ per port). The maximum total
PoE power in a 1RU switch is 1800 W.
• Support for Cisco-enhanced PoE.
• Support for prestandard Cisco powered devices.
• Configuration for StackPower. When the switch internal power supply module(s) cannot support the
total load, StackPower configurations allow the switch to leverage power available from other switches.
• Configurable support for Cisco intelligent power management, including enhanced power negotiation,
power reservation, and per-port power policing.
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Product Overview
10/100/1000 Ports

Depending on the installed power supply modules, each port can deliver up to 60 W of Cisco UPOE. See the
Power Supply Modules, on page 25 for the power supply matrix that defines the available PoE, PoE+, and
Cisco UPOE power per port. The output of the PoE+ circuit has been evaluated as a Limited Power Source
(LPS) per IEC 60950-1.
Restrictions for the WS-C3850-12X48U-L, WS-C3850-12X48U-S and WS-C3850-12X48U-E switch models:
• A maximum of 28 ports are available for UPoE connections. This is because some power from the power
supplies is diverted to the switch, and only the remaining power is transmitted to the ports.
Note
SFP and QSFP Module Slots
The uplink and downlink ports for the Catalyst WS-C3850 switch models are as follows.
• The downlink ports on the Catalyst WS-C3850-12S and WS-C3850-24S switch models support standard
SFP modules.
• The downlink ports on the Catalyst WS-C3850-12XS and WS-C3850-24XS switch models support
standard SFP+ modules.
•The 10G downlink ports on the Catalyst WS-C3850-48XS-S, WS-C3850-48XS-F-S, WS-C3850-48XS-E
and WS-C3850-48XS-F-E switch models support standard SFP+ modules.
•The 40G downlink ports on the Catalyst WS-C3850-48XS-S, WS-C3850-48XS-F-S, WS-C3850-48XS-E
and WS-C3850-48XS-F-E switch models support standard QSFP modules.
For supported SFP modules, refer to the Cisco Transceiver Modules Compatibility Information at
http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html
For information about the (uplink) SFP module slots on the network modules, see Network Modules, on page
11.
Note
Management Ports
The management ports connect the switch to a PC running Microsoft Windows or to a terminal server.
• Ethernet management port. See Ethernet Management Port, on page 30.
• RJ-45 console port (EIA/TIA-232). See RJ-45 Console Port, on page 31.
• USB mini-Type B console port (5-pin connector).
The 10/100/1000 Ethernet management port connection uses a standard RJ-45 crossover or straight-through
cable. The RJ-45 console port connection uses the supplied RJ-45-to-DB-9 female cable. The USB console
port connection uses a USB Type A to 5-pin mini-Type B cable. The USB console interface speeds are the
same as the RJ-45 console interface speeds.
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Product Overview
SFP and QSFP Module Slots

If you use the USB mini-Type B console port, the Cisco Windows USB device driver must be installed on
any PC connected to the console port (for operation with Microsoft Windows). Mac OS X or Linux do not
require special drivers.
The 4-pin mini-Type B connector resembles the 5-pin mini-Type B connectors. They are not compatible. Use
only the 5-pin mini-Type B.
Figure 4: USB Mini-Type B Port
This illustration shows a 5-pin mini-Type B USB port.
With the Cisco Windows USB device driver, you can connect and disconnect the USB cable from the console
port without affecting Windows HyperTerminal operations.
The console output always goes to both the RJ-45 and the USB console connectors, but the console input is
active on only one of the console connectors at any one time. The USB console takes precedence over the
RJ-45 console. When a cable is connected into the USB console port, the RJ-45 console port becomes inactive.
Conversely, when the USB cable is disconnected from the USB console port, the RJ-45 port becomes active.
You can use the command-line interface (CLI) to configure an inactivity timeout which reactivates the RJ-45
console if the USB console has been activated and no input activity has occurred on the USB console for a
specified time.
After the USB console deactivates due to inactivity, you cannot use the CLI to reactivate it. Disconnect and
reconnect the USB cable to reactivate the USB console. For information on using the CLI to configure the
USB console interface, see the software guide.
USB Type A Port
The USB Type A port provides access to external USB flash devices (also known as thumb drives or USB
keys) and to specific Cisco USB Bluetooth devices.
The port supports Cisco USB flash drives with capacities from 128 MB to 8 GB (USB devices with port
densities of 128 MB, 256 MB, 1 GB, 4 GB, and 8 GB are supported). When combined with stacking, you can
upgrade other switches in the stack from an USB key inserted in any switch within the stack. Cisco IOS
software provides standard file system access to the flash device: read, write, erase, and copy, as well as the
ability to format the flash device with a FAT file system.
It provides you with the ability to automatically upgrade the internal flash with the USB drive's configuration
and image for emergency switch recovery using USB auto-upgrade. This feature checks the internal flash for
a bootable image and configuration and if either image or the configuration is not available, then the USB
drive is checked for boot images and configuration. If the boot image and configuration are available, these
are copied to flash for the reboot.
The port supports Cisco USB Bluetooth devices. The USB Bluetooth device acts as a Bluetooth host and
serves as either a serial port or a management port connection. You can pair it with your Bluetooth smart
phone, laptop, or tablet. If you configure the serial profile on the Bluetooth device, the switch turns the USB
port into a serial port. If you configure the Personal Area Network (PAN) profile on the Bluetooth device, the
switch turns the USB port into a management interface.
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Product Overview
USB Type A Port

Figure 5: Cisco USB Bluetooth
Network Modules
The switch supports one hot-swappable network module that provides uplink ports to connect to other devices.
The switch should only be operated with either a network module or a blank module installed.
The switch generates logs when you insert or remove a network module with SFP ports.
Table 2: Network Modules
DescriptionNetwork Module5
This module has four 1 G SFP module slots. Any combination of standard SFP
modules are supported. SFP+ modules are not supported.
If you insert an SFP+ module in the 1 G network module, the SFP+ module does
not operate, and the switch logs an error message.
This is supported on the following switch models:
Note
• WS-C3850-24T/P/U
• WS-C3850-48T/F/P/U
• WS-C3850-12X48U
• WS-C3850-24XU
• WS-C3850-12S
• WS-C3850-24S
C3850-NM-4-1G
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Product Overview
Network Modules

DescriptionNetwork Module5
This module has four slots:
Two slots (left side) support only 1 G SFP modules and two slots (right side)
support either 1 G SFP or 10 G SFP modules.
This is supported on the following switch models:
Note
• WS-C3850-24T/P/U
• WS-C3850-48T/F/P/U
• WS-C3850-12X48U
• WS-C3850-24XU
• WS-C3850-12S
• WS-C3850-24S
C3850-NM-2-10G
This module has four 10 G slots or four 1 G slots.
This is supported on the following switch models:
Note
• WS-C3850-48T/F/P/U
• WS-C3850-12X48U
• WS-C3850-24XU
• WS-C3850-12XS
• WS-C3850-24XS
C3850-NM-4-10G
This module has eight 10 G slots with an SFP+ port in each slot. Each port
supports a 1 G or 10 G connection
This is supported on the following switch models:
Note
• WS-C3850-12X48U
• WS-C3850-24XU
• WS-C3850-24XS
C3850-NM-8-10G
This module has two 40 G slots with a QSFP+ connector in each slot.
This is supported on the following switch models:
Note
• WS-C3850-12X48U
• WS-C3850-24XU
• WS-C3850-24XS
C3850-NM-2-40G
Insert this blank module when the switch has no uplink ports (this is required for
sufficient air flow).
C3850-NM-BLANK
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Product Overview
Network Modules

5All network modules are hot-swappable.
For information about the network modules, see the Installing Network Modules. For cable specifications,
see Cables and Adapters.
SFP and SFP+ Modules
The SFP and SFP+ modules provide copper or fiber-optic connections to other devices. These transceiver
modules are field-replaceable, and they provide the uplink interfaces (expect in the fixed SFP slots in the
WS-C3850-12S and WS-C3850-24S switches) when installed in an SFP module slot. The SFP modules have
LC connectors for fiber-optic connections or RJ-45 connectors for copper connections.
The downlink ports on the Catalyst WS-C3850-12S and WS-C3850-24S switch models support standard SFP
modules, and the downlink ports on the Catalyst WS-C3850-12XS and WS-C3850-24XS switch models
support standard SFP+ modules.
Note
Use only Cisco SFP and SFP+ modules on the switch. For the latest information about supported SFP and
SFP+ modules, refer to the Cisco Transceiver Modules Compatibility Information at
http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html
For information about SFP modules, see the documentation at Installing SFP and SFP+ Modules.
The Catalyst 3850 switch supports the SFP module patch cable (CAB-SFP-50CM), a 0.5-meter, copper,
passive cable with SFP module connectors at each end. This cable is only used with 1-Gigabit Ethernet SFP
ports to connect two Catalyst 3850 switches in a cascaded configuration.
For information about QSFP modules, see the documentation at
•QSFP Port Cabling Specifications
•Cisco S-Class 40GBASE QSFP Modules Data Sheet
LEDs
You can use the switch LEDs to monitor switch activity and its performance.
Catalyst 3850 switches might have slight cosmetic differences on the bezels.
Note
Product Overview
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Product Overview
SFP and SFP+ Modules

Figure 6: Switch Front Panel LEDs
This figure shows the switch LEDs and the Mode button that you use to select a port mode.
USB mini-Type B console
port LED
6STAT (status)1
SYST (system)7DUPLX (duplex)2
ACTV (active)8SPEED3
XPS 6 9STACK4
S-PWR (StackPower)10PoE5
6XPS = expandable power system.
7Only on switch models that support PoE.
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Product Overview
LEDs

Figure 7: Switch Front Panel LEDs for the WS-C3850-12S, WS-C3850-24S, WS-C3850-12XS, and WS-C3850-24XS Switches
USB mini-Type B console
port LED
6UID (blue beacon)1
SYST (system)7STAT (status)2
ACTV (active)8DUPLX (duplex)3
XPS 8 9SPEED4
S-PWR (StackPower)10STACK5
8XPS = expandable power system.
Figure 8: Switch Front Panel LEDs for the WS-C3850-48XS Switches
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Product Overview
LEDs

STACK5UID (blue beacon)1
USB mini-Type B console
port LED
6STAT (status)2
SYST (system)7DUPLX (duplex)3
ACTV (active)8SPEED4
SYST LED
Table 3: SYST LED
System StatusColor
System is not powered on.Off
System is operating normally.Green
POST in progress.Blinking green
System is receiving power but is not functioning
properly.
Amber
There is a fault with one of the following:
• Network module (non traffic-related)
• Power supply
• Fan module
Blinking amber
XPS LED
Table 4: XPS LED
DescriptionColor
XPS cable is not installed.
Switch is in StackPower mode.
Off
XPS is connected and ready to provide back-up power.Green
XPS is connected but is unavailable because it is providing power to another device
(redundancy has been allocated to a neighboring device).
Blinking green
The XPS is in standby mode or in a fault condition. See the XPS 2200
documentation for information about the standby mode and fault conditions.
Amber
The power supply in a switch has failed, and the XPS is providing power to that
switch (redundancy has been allocated to this device).
Blinking amber
For information about the XPS 2200, see the Cisco eXpandable Power System 2200 Hardware Installation
Guide on Cisco.com:
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Product Overview
SYST LED

http://www.cisco.com/go/xps2200_hw
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 5: Port Mode LEDs
DescriptionPort ModeMode LED
The port status. This is the default mode.Port statusSTAT
The port operating speed: 10, 100, or 1000 Mb/s.Port speedSPEED
The port duplex mode: full duplex or half duplex.Port duplex modeDUPLX
The active switch status.ActiveACTV
Stack member status.
The StackWise port status. See STACK LED, on page 20.
Stack member status
StackWise port status
STACK
The PoE+ port status.The PoE+ port status.PoE9
9Only switches with PoE+ ports.
Table 6: Meaning of Switch LED Colors in Different Modes
MeaningPort LED ColorPort Mode
No link, or port was administratively shut down.OffSTAT (port status)
Link present, no activity.Green
Activity. Port is sending or receiving data.Blinking green
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.
Alternating green-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.
Amber
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Product Overview
Port LEDs and Modes

MeaningPort LED ColorPort Mode
10/100/1000/SFP portsSPEED
Port is operating at 10 Mb/s.Off
Port is operating at 100 Mb/s.Green
Port is operating at 1000 Mb/s.Single green flash (on for
100 ms, off for 1900 ms)
Port is operating at 2500, 5000 or 10000 Mb/sBlinking twice
Network module slots
Port is not operating.
Off
Port is operating at up to 10 Gb/s.Blinking green
Port is operating in half duplex.
OffDUPLX (duplex)
Port is operating in full duplex.Green
The switch is not the active switch.
For a standalone switch, this LED is off.
Note
OffACTV (data active
switch)
The switch is the active switch.Green
Error during active switch election.Amber
Switch is a standby member of a data stack and assumes
active responsibilities if the current active switch fails.
Blinking green
No stack member corresponding to that member number.
OffSTACK (stack
member)
Stack member number.Blinking green
Member numbers of other stack member switches.Green
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Product Overview
Port LEDs and Modes

MeaningPort LED ColorPort Mode
PoE+ is off.
If the powered device is receiving power from an AC
power source, the port LED is off even if the device is
connected to the switch port.
OffPoE+10
PoE+ is on. The port LED is green when the switch port
is providing power.
Green
PoE+ is denied because providing power to the powered
device will exceed the switch power capacity.
Alternating green-amber
PoE+ is off due to a fault or because it has exceeded a
limit set in the switch software.
PoE+ faults occur when noncompliant cabling
or powered devices are connected to a PoE+
port. Use only standard-compliant cabling to
connect Cisco prestandard IP Phones and
wireless access points or IEEE
802.3af-compliant devices to PoE+ ports. You
must remove from the network any cable or
device that causes a PoE+ fault.
Caution
Blinking amber
PoE+ for the port has been disabled.
PoE+ is enabled by default.
Note
Amber
10 Only switches with PoE or PoE+ ports.
USB Console LED
The USB console LED shows whether there is an active USB connection to the port.
Table 7: USB Console LED
DescriptionColorLED
USB console port is active.GreenUSB console port
The USB is disabled.Off
S-PWR LED
Table 8: S-PWR LED
DescriptionColor
StackPower cable is not connected, or the switch is in standalone mode.Off
Each StackPower port is connected to another switch.Green
Product Overview
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Product Overview
USB Console LED

DescriptionColor
This appears on the switch in a StackPower ring configuration that detects an open
ring or has only one StackPower cable connected.
Blinking green
There is a fault: load shedding is occurring, a StackPower cable is defective, or an
administrative action is required. See the switch software configuration guide for
information about configuring StackPower.
Amber
The StackPower budget is not sufficient to meet current power demands.Blinking amber
ACTV LED
Table 9: ACTV LED
DescriptionColor
Switch is not the active switch.Off
Switch is the active switch or a standalone switch.Green
Switch is in stack standby mode.Slow blinking green
An error occurred when the switch was selecting the active switch, or another type
of stack error occurred.
Amber
STACK LED
The STACK LED shows the sequence of member switches in a stack. Up to nine switches can be members
of a stack. The first nine port LEDs show the member number of a switch in a stack.
Figure 9: STACK LED
This figure shows the LEDs on for each switch. When you press the Mode button to select the STACK LED,
the corresponding port LEDs will blink green for each switch. For example, for switch 1, port 1 will blink
green and the rest of the LEDs will be off. On switch 2, port 2 will blink green and the rest of the LEDs will
be off. The same behavior will be seen with the remaining switches in the
stack.
Product Overview
20
Product Overview
ACTV LED