Cisco Catalyst 3850 IP Services operation manual

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Catalyst 3850 Switch Hardware Installation Guide

First Published: 2013-01-21

Last Modified: 2015-09-22

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Text Part Number: OL-26779-05

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THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If the equipment causes interference to radio or television reception, which can be determined by turning the equipment off and on, users are encouraged to try to correct the interference by using one or more of the following measures:

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•

Consult the dealer or an experienced radio/TV technician for help.

•

Modifications to this product not authorized by Cisco could void the FCC approval and negate your authority to operate the product

The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright©1981, Regents of the University of California.

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED "AS IS" WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: http://

www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership

relationship between Cisco and any other company. (1110R)

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Preface

CHAPTER 1

Preface ix

Document Conventions ix

Preface

Document Conventions, page ix

•

Document Conventions

This document uses the following conventions:

DescriptionConvention

^ or Ctrl

Italic font

...

[x | y]

Both the ^ symbol and Ctrl represent the Control (Ctrl) key on a keyboard. For example, the key combination ^D or Ctrl-D means that you hold down the Control key while you press the D key. (Keys are indicated in capital letters but are not case sensitive.)

Commands and keywords and user-entered text appear in bold font.bold font

Document titles, new or emphasized terms, and arguments for which you supply values are in italic font.

Terminal sessions and information the system displays appear in courier font.Courier font

Bold Courier font indicates text that the user must enter.Bold Courier font

Elements in square brackets are optional.[x]

An ellipsis (three consecutive nonbolded periods without spaces) after a syntax element indicates that the element can be repeated.

A vertical line, called a pipe, indicates a choice within a set of keywords or arguments.

Optional alternative keywords are grouped in brackets and separated by vertical bars.

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Document Conventions

Preface

DescriptionConvention

Note

{x | y}

Required alternative keywords are grouped in braces and separated by vertical bars.

[x {y | z}]

Nested set of square brackets or braces indicate optional or required choices within optional or required elements. Braces and a vertical bar within square brackets indicate a required choice within an optional element.

string

A nonquoted set of characters. Do not use quotation marks around the string or the string will include the quotation marks.

Nonprinting characters such as passwords are in angle brackets.< >

Default responses to system prompts are in square brackets.[ ]

!, #

An exclamation point (!) or a pound sign (#) at the beginning of a line of code indicates a comment line.

Reader Alert Conventions

This document may use the following conventions for reader alerts:

Means reader take note. Notes contain helpful suggestions or references to material not covered in the manual.

Tip

Caution

Timesaver

Warning

Means the following information will help you solve a problem.

Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.

Means the described action saves time. You can save time by performing the action described in the paragraph.

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

SAVE THESE INSTRUCTIONS

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Preface

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

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Obtaining Documentation and Submitting a Service Request

Preface

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CHAPTER 1

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, page 1

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Front Panel, page 5

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Rear Panel, page 23

•

Management Options, page 32

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Switch Models

Table 1: Catalyst 3850 Switch Models and Descriptions

Switch Model

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Supported Software Image

LAN BaseWS-C3850-24T-L

LAN BaseWS-C3850-48T-L

LAN BaseWS-C3850-24P-L

Description

Stackable 24 10/100/1000 Ethernet ports, 1 network module slot1, 350 W power supply

Stackable 48 10/100/1000 Ethernet ports, 1 network module slot, 350 W power supply

Stackable 24 10/100/1000 PoE+2ports, 1 network module slot, 715 W power supply

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Switch Models

Product Overview

Switch Model

Supported Software Image

LAN BaseWS-C3850-48P-L

LAN BaseWS-C3850-48F-L

LAN BaseWS-C3850-24U-L

LAN BaseWS-C3850-48U-L

LAN BaseWS-C3850-12X48U-L

LAN BaseWS-C3850-24XU-L

IP BaseWS-C3850-24T-S

Description

Stackable 48 10/100/1000 PoE+ ports, 1 network module slot, 715 W power supply

Stackable 48 10/100/1000 PoE+ ports, 1 network module slot, 1100 W power supply

Stackable 24 10/100/1000 Cisco UPOE3ports, 1 network module slot, 1100 W power supply

Stackable 48 10/100/1000 Cisco UPOE ports, 1 network module slot, 1100 W power supply

Stackable 12 100M/1G/2.5G/5G/10G and 36 1G UPoE ports, 1 network module slot, 1100 W power supply

Stackable 24 100M/1G/2.5G/5G/10G UPoE ports, 1 network module slot, 1100-W power supply

Stackable 24 10/100/1000 Ethernet ports, 1 network module slot, 350 W power supply

IP BaseWS-C3850-48T-S

Stackable 48 10/100/1000 Ethernet ports, 1 network module slot, 350 W power supply

IP BaseWS-C3850-24P-S

Stackable 24 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, 715 W power supply

IP BaseWS-C3850-48F-S

Stackable 48 10/100/1000 PoE+ ports, 1 network module slot, 1100 W power supply

IP BaseWS-C3850-24U-S

Stackable 24 10/100/1000 Cisco UPOE ports, 1 network module slot, 1100 W power supply

IP BaseWS-C3850-48U-S

Stackable 48 10/100/1000 Cisco UPOE ports, 1 network module slot, 1100 W power supply

IP BaseWS-C3850-24PW-S

Catalyst 3850 24-port PoE IP Base with 5 access points license

IP BaseWS-C3850-48PW-S

Catalyst 3850 48-port PoE IP Base with 5 access points license

IP BaseWS-C3850-12S-S

Stackable 12 SFP module slots, 1 network module slot, 350 W power supply

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Product Overview

Switch Models

Switch Model

Supported Software Image

IP BaseWS-C3850-24S-S

IP BaseWS-C3850-12XS-S

IP BaseWS-C3850-16XS-S

IP BaseWS-C3850-24XS-S

IP BaseWS-C3850-32XS-S

IP BaseWS-C3850-48XS-S

Description

Stackable 24 SFP module slots, 1 network module slot, 350 W power supply

Catalyst 3850 12-port SFP+ transceiver, 1 network module slot, support for up to 10 G SFP+, 350 W power supply

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.

Catalyst 3850 24-port SFP+ transceiver, 1 network module slot, support for up to 10 G SFP+, 715 W power supply.

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.

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 BaseWS-C3850-48XS-F-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.

The airflow direction for this switch is from the rear panel to the front panel.

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 12 100M/1G/2.5G/5G/10G and 36 1 G 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 100M/1G/2.5G/5G/10G UPoE ports, 1 network module slot, 1100-W power supply

IP ServicesWS-C3850-24T-E

Stackable 24 10/100/1000 Ethernet ports, 1 network module slot, 350 W power supply

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Switch Models

Product Overview

Switch Model

Supported Software Image

IP ServicesWS-C3850-48T-E

IP ServicesWS-C3850-24P-E

IP ServicesWS-C3850-48P-E

IP ServicesWS-C3850-48F-E

IP ServicesWS-C3850-24U-E

IP ServicesWS-C3850-48U-E

IP ServicesWS-C3850-12S-E

Description

Stackable 48 10/100/1000 Ethernet ports, 1 network module slot, 350 W power supply

Stackable 24 10/100/1000 PoE+ ports, 1 network module slot, 715 W power supply

Stackable 48 10/100/1000 PoE+ ports, 1 network module slot, 715 W power supply

Stackable 48 10/100/1000 PoE+ ports, 1 network module slot, 1100 W power supply

Stackable 24 10/100/1000 Cisco UPOE ports, 1 network module slot, 1100 W power supply

Stackable 48 10/100/1000 Cisco UPOE ports, 1 network module slot, 1100 W power supply

Stackable 12 SFP module slots, 1 network module slot, 350 W power supply

IP ServicesWS-C3850-24S-E

Stackable 24 SFP module slots, 1 network module slot, 350 W power supply

IP ServicesWS-C3850-12XS-E

Catalyst 3850 12-port SFP+ transceiver, 1 network module slot, support for up to 10 G SFP+, 350 -W power supply.

IP ServicesWS-C3850-16XS-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-C3850-24XS-E

Catalyst 3850 24-port SFP+ transceiver, 1 network module slot, support for up to 10 G SFP+, 715 W power supply.

IP ServicesWS-C3850-32XS-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-C3850-48XS-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 front panel to the rear panel.

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Product Overview

Front Panel

Switch Model

Supported Software Image

IP ServicesWS-C3850-48XS-F-E

IP ServicesWS-C3850-12X48U-E

IP ServicesWS-C3850-24XU-E

For supported network modules, see Network Modules, on page 10 .

PoE+ = Power over Ethernet plus (provides up to 30 W per port).

UPOE = Universal Power Over Ethernet (provides up to 60 W Cisco UPOE per port)

The WS-C3850-48XS switches do not support StackWise-480

Front Panel

Description

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.

Stackable 12 100M/1G/2.5G/5G/10G and 36 1 G UPoE ports, 1 network module slot, 1100 W power supply

Stackable 24 100M/1G/2.5G/5G/10G UPoE ports, 1 network module slot, 1100-W power supply

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

•

LEDs

•

Mode button

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All of the switches have similar components. See the following illustrations for examples.

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Front Panel

Product Overview

The Catalyst 3850 switches might have slight cosmetic differences on the bezels.Note

Figure 1: WS-C3850-48P-L Switch Front Panel

Figure 2: WS-C3850-24S Switch Front Panel

The WS-C3850-12S switches have similar front panels.Note

USB mini-Type B (console) port4Mode button1

10/100/1000 PoE+ ports5Status LEDs2

Network module6USB Type A storage port3

USB Type A storage port5UID button1

SFP module slots (downlink)6Mode button2

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Product Overview

10/100/1000 Ports

Network module7Status LEDs3

USB mini-Type B (console) port4

Figure 3: WS-C3850-24XS-E Switch Front Panel

The WS-C3850-24XS-E switches have the following components.Note

10/100/1000 Ports

The 10/100/1000 ports use RJ-45 connectors with Ethernet pinouts. The maximum cable length is 328 feet (100 meters). 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 Port Connections, on page 50. 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.

USB mini-Type B (console) port4Mode button1

10 G SFP+ ports5Status LEDs2

Network module6USB Type A storage port3

Support for Cisco-enhanced PoE.

•

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SFP and QSFP Module Slots

•

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 26 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.

Product Overview

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.

Note

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.

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

Note

For information about the (uplink) SFP module slots on the network modules, see Network Modules, on

page 10.

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 31.

•

RJ-45 console port (EIA/TIA-232). See RJ-45 Console Port, on page 32.

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Product Overview

USB Type A Port

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.

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.

This illustration shows a 5-pin mini-Type B USB port.

Figure 4: USB Mini-Type B 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.

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Network Modules

Product Overview

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.

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

C3850-NM-4-1G

DescriptionNetwork Module

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.

Note

This is supported on the following switch models:

WS-C3850-24T/P/U

•

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-12S

•

WS-C3850-24S

•

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Product Overview

Network Modules

C3850-NM-2-10G

C3850-NM-4-10G

DescriptionNetwork Module

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.

Note

This is supported on the following switch models:

WS-C3850-24T/P/U

•

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-12S

•

WS-C3850-24S

•

This module has four 10 G slots or four 1 G slots.

Note

This is supported on the following switch models:

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

C3850-NM-8-10G

C3850-NM-2-40G

WS-C3850-24XU

•

WS-C3850-12XS

•

WS-C3850-24XS

•

This module has eight 10 G slots with an SFP+ port in each slot. Each port supports a 1 G or 10 G connection

Note

This is supported on the following switch models:

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-24XS

•

This module has two 40 G slots with a QSFP+ connector in each slot.

Note

This is supported on the following switch models:

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-24XS

•

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LEDs

Product Overview

C3850-NM-BLANK

All network modules are hot-swappable.

For information about the network modules, see the Installing Network Modules, on page 59. For cable specifications, see Cables and Adapters, on page 103.

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.

Note

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.

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, on page

65.

DescriptionNetwork Module

Insert this blank module when the switch has no uplink ports (this is required for sufficient air flow).

LEDs

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

•

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

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Product Overview

LEDs

This figure shows the switch LEDs and the Mode button that you use to select a port mode.

Figure 6: Switch Front Panel LEDs

XPS = expandable power system.

USB mini-Type B console port LED6STAT (status)1

SYST (system)7DUPLX (duplex)2

ACTV (active)8SPEED3

XPS

9STACK4

S-PWR (StackPower)10PoE

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LEDs

Only on switch models that support PoE.

Figure 7: Switch Front Panel LEDs for the WS-C3850-12S, WS-C3850-24S, WS-C3850-12XS, and WS-C3850-24XS Switches

Product Overview

USB mini-Type B console port LED6UID (blue beacon)1

SYST (system)7STAT (status)2

ACTV (active)8DUPLX (duplex)3

XPS

9SPEED4

S-PWR (StackPower)10STACK5

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Product Overview

XPS = expandable power system.

Figure 8: Switch Front Panel LEDs for the WS-C3850-48XS Switches

LEDs

SYST LED

STACK5UID (blue beacon)1

USB mini-Type B console port LED6STAT (status)2

SYST (system)7DUPLX (duplex)3

ACTV (active)8SPEED4

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

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LEDs

Product Overview

System StatusColor

XPS LED

Blinking amber

Table 4: XPS LED

Off

Blinking green

There is a fault with one of the following:

Network module (non traffic-related)

•

Power supply

•

Fan module

•

DescriptionColor

XPS cable is not installed.

Switch is in StackPower mode.

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).

Amber

Blinking amber

For information about the XPS 2200, see the Cisco eXpandable Power System 2200 Hardware Installation Guide on Cisco.com:

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.

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.

The power supply in a switch has failed, and the XPS is providing power to that switch (redundancy has been allocated to this device).

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Product Overview

LEDs

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

Only switches with PoE+ ports.

Table 6: Meaning of Switch LED Colors in Different Modes

STACK

Stack member status

StackWise port status

Alternating green-amber

Amber

Stack member status.

The StackWise port status. See STACK LED, on page

20.

The PoE+ port status.The PoE+ port status.PoE

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.

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.

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LEDs

Product Overview

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

switch)

member)

OffACTV (data active

Blinking green

Port is operating in half duplex.OffDUPLX (duplex)

Port is operating in full duplex.Green

The switch is not the active switch.

Note

For a standalone switch, this LED is off.

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.

No stack member corresponding to that member number.OffSTACK (stack

Stack member number.Blinking green

Member numbers of other stack member switches.Green

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Product Overview

LEDs

MeaningPort LED ColorPort Mode

OffPoE+

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.

Only switches with PoE or PoE+ ports.

Green

Alternating green-amber

Blinking amber

Amber

PoE+ is on. The port LED is green when the switch port is providing power.

PoE+ is denied because providing power to the powered device will exceed the switch power capacity.

PoE+ is off due to a fault or because it has exceeded a limit set in the switch software.

Caution

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.

PoE+ for the port has been disabled.

Note

PoE+ is enabled by default.

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

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LEDs

S-PWR LED

Product Overview

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

ACTV LED

Blinking green

Amber

Table 9: ACTV LED

Amber

This appears on the switch in a StackPower ring configuration that detects an open ring or has only one StackPower cable connected.

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.

The StackPower budget is not sufficient to meet current power demands.Blinking amber

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.

STACK LED

The STACK LED shows the sequence of member switches in a stack. Up to eight switches can be members of a stack. The first eight port LEDs show the member number of a switch in a stack.

This figure shows the LEDs on the first switch, which is stack member number 1. For example, if you press the Mode button and select Stack, the LED for port 1 blinks green. The LEDs for ports 2 and 3 are solid green,

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Product Overview

LEDs

as these represent the member numbers of other switches in the stack. The other port LEDs are off because there are no more members in the stack.

Figure 9: STACK LED

LED blinks green to show that this is switch 1

4Stack member 11

in the stack.

PoE LED

LED is solid green to show that switch 2 is a

5Stack member 22

stack member.

LED is solid green to show that switch 3 is a

6Stack member 33

stack member.

The PoE LED indicates the status of the PoE mode: either PoE, PoE+, or Cisco UPOE.

Table 10: PoE LED

DescriptionColor

Off

PoE mode is not selected. None of the 10/100/1000 ports have been denied power or are in a fault condition.

PoE mode is selected, and the port LEDs show the PoE mode status.Green

Blinking amber

PoE mode is not selected. At least one of the 10/100/1000 ports has been denied power, or at least one of the 10/100/1000 ports has a PoE mode fault.

UID/Beacon LED

The UID and the Beacon LED can be turned on by the administrator to indicate that the switch needs attention. It helps the administrator identify the switch. The beacon can be turned on by either pressing the UID button

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LEDs

Product Overview

on the switch front panel, or by using the CLI. There is a blue beacon on the front and rear panel of the switch. The blue beacon on the front panel is a button labeled UID, and on the back panel it is a LED labeled BEACON.

Table 11: UID/Beacon LED Indicator (Applies Only to the WS-C3850-12S, WS-C3850-24S , WS-C3850-12XS, and WS-C3850-24XS Switches)

DescriptionColor/State

Solid blue

Network Module LEDs

Figure 10: Network Module LEDs

Blinking green

The operator has indicated that the system needs attention.

G3 LED3G1 LED1

G4 LED4G2 LED2

Network Module Link StatusColor

Link is off.Off

Link is on; no activity.Green

Activity on a link; no faults.

The LED will blink green even when there is very little control traffic.Note

Blinking amber

Link is off due to a fault or because it has exceeded a limit set in the switch software.

Caution

Link faults occur when noncompliant cabling is connected to an SFP or SFP+ port. Use only standard-compliant cabling to connect to Cisco SFP and SFP+ ports. You must remove from the network any cable or device that causes a link fault.

Link for the SFP or SFP+ has been disabled.Amber

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Product Overview

Rear Panel

The switch rear panel includes StackWise connectors, StackPower or XPS 2200 connectors, ports, fan modules, and power supply modules.

Figure 11: Catalyst 3850 Switch Rear Panel

StackWise port connector6Ground connector1

StackPower connector7CONSOLE (RJ-45 console port)2

port)

AC OK (input) status LED8MGMT (RJ-45 10/100/1000 management

PS OK (output) status LED9RESET button4

Power supply modules (AC power supply

10Fan module5

modules shown)

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Rear Panel

Product Overview

Figure 12: WS-C3850-12S and WS-C3850-24S Switches Switch Rear Panel

StackWise port connector7Ground connector1

StackPower connector8CONSOLE (RJ-45 console port)2

AC OK (input) status LED9MGMT (RJ-45 10/100/1000 management

port)

PS OK (output) status LED10RESET button4

Power supply modules (AC power supply

11BEACON LED5

modules shown)

Fan module6

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Product Overview

Rear Panel

Figure 13: WS-C3850-48XS Switches Switch Rear Panel

Fan module5Ground connector1

Power supply FAIL LED6CONSOLE (RJ-45 console port)2

Power supply OK LED7BEACON LED3

Power supply modules8MGMT (RJ-45 10/100/1000 management 9

AC OK (input) status LED port)

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RJ-45 Console Port LED

Table 12: RJ-45 Console Port LED

StackWise Ports

StackWise ports are used to connect switches in StackWise stacking configurations. The switch ships with a

0.5-meter StackWise cable that you can use to connect the StackWise ports. For more information on StackWise cables, see Connecting to the StackWise Ports, on page 48.

Product Overview

RJ-45 Console Port StatusColor

RJ-45 console is disabled. USB console is active.Off

RJ-45 console is enabled. USB console is disabled.Green

Caution

Use only approved cables, and connect only to similar Cisco equipment. Equipment might be damaged if connected to nonapproved Cisco cables or equipment.

Power Supply Modules

The switches are powered through one or two internal power supply modules.

Supported power supply modules:

PWR-C1-350WAC

•

PWR-C1-715WAC

•

PWR-C1-1100WAC

•

PWR-C1-440WDC

•

The following power supply modules are applicable to only the WS-C3850-48XS switches:

PWR-C3-750WAC-R: This module has red handles to match fans with red handles. Airflow is from the

•

front panel to the rear panel (warm air is ‘pulled out of’ the switch.)

PWR-C3-750WAC-F: This module has blue handles to match fans with blue handles. Airflow is from

•

the rear panel to the front panel (cool air is ‘pushed into’ the switch.)

PWR-C3-750WDC-R: This module has red handles to match fans with red handles. Airflow is from the

•

front panel to the rear panel (warm air is ‘pulled out of’ the switch.)

PWR-C3-750WDC-F: This module has blue handles to match fans with blue handles. Airflow is from

• the rear panel to the front panel (cool air is ‘pushed into’ the switch.)

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Product Overview

Power Supply Modules

The switch has two internal power supply module slots. You can use two AC modules, two DC modules, a mixed configuration of one AC and one DC power supply module, or one power supply module and a blank module.

The switch can operate with either one or two active power supply modules or with power supplied by a stack. A Catalyst 3850 switch that is in a StackPower stack can operate with power supplied by other switches in the stack.

Switch Models, on page 1 shows the default power supply modules that ship with each switch model. All

power supply modules (except the blank modules) have internal fans. All switches ship with a blank power supply module in the second power supply slot.

Caution

Do not operate the switch with one power supply module slot empty. For proper chassis cooling, both power supply module slots must be populated with either a power supply or a blank module.

The 350-W and 715-W AC power supply modules are autoranging units that support input voltages between 100 and 240 VAC. The 1100-W power supply module is an autoranging unit that supports input voltages between 115 and 240 VAC. The 440-W DC power supply module has dual input feeds (A and B) and supports input voltages between 36 and 72 VDC. The output voltage range is 51 to 57 V.

Each AC power supply module has a power cord for connection to an AC power outlet. The 1100-W and 715-W modules use a 16-AWG cord (only North America). All other modules use an 18-AWG cord. The DC-power supply module must be wired to a DC-power source.

The following tables show the PoE available and PoE requirements for Catalyst 3850 PoE switch models.

Table 13: Available PoE with AC Power Supply

Available PoEDefault Power SupplyModels

PWR-C1-350WAC12-port data switch

—

24-port data switch

48-port data switch

435 WPWR-C1-715WAC24-port PoE+ switch

48-port PoE+ switch

800 WPWR-C1-1100WAC48-port full PoE+ switch

24-port Cisco UPOE switch

48-port Cisco UPOE switch

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Power Supply Modules

Table 14: Available PoE with DC Power Supply

Product Overview

Available PoENumber of Power SuppliesModels

220 W124-port PoE+ switch

660 W2

185 W148-port PoE+ switch

625 W2

220 W124-port Cisco UPOE switch

660 W2

185 W148-port Cisco UPOE switch

625 W2

Table 15: Switch Power Supply Requirements for PoE, PoE+, and Cisco UPoE

24-Port SwitchPoE Option

(1) 715 WPoE (up to 15.4 per port)

PoE+ (up to 30 W per ports)

These are the combinations of power supplies:

(1) 1100 W

•

(1) 715 W + (1) 715 W

•

(2) 1100 WCisco UPoE (up to 60 W per port)

48-Port Switch

These are the combinations of power supplies:

(1) 1100 W

•

(1) 715 W + (1) 715 W

•

These are the combinations of power supplies:

(1) 1100 W + (1) 715 W

•

(2) 1100 W

•

These are the combinations of power supplies:

(1) 1100 W + (1) 715 W

•

(2) 1100 W

•

Note

Up to 30 PoE ports can receive full Cisco UPoE.

A 48-port switch with one 715-W power supply provides up to 8.7 W of PoE to all ports.

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Product Overview

Fan Module

Note

Considerations for the WS-C3850-12X48U-L, WS-C3850-12X48U-S and WS-C3850-12X48U-E switch models:

The primary power supply for these switch models should be a minimum of 470 W.

•

350 W or 440 W can be used only as secondary power supplies. If the switch draws power from

•

these modules as the primary source, reboot the switch to restore these modules as secondary power supplies.

The power supply modules have two status LEDs.

Table 16: Switch Power Supply Module LEDs

DescriptionPS OKDescriptionAC OK

DC OK

Off

OffNo AC input power.

No DC input power.

Output is disabled, or input is outside operating range (AC LED is off).

Output is disabled, or input is outside operating range (DC LED is off).

Green

DC input power present.

Power output to switch active.GreenAC input power present.

Output has failed.Red

Fan Module

Note

For information about replacing a power supply module, wiring a DC power supply module, and module specifications, see the "Power Supply Installation" and "Technical Specifications" chapters.

Depending on the switch model, three or five internal hot-swappable 12-V fan modules (FAN-T1=) are available. The air circulation system consists of the fan modules and the power supply modules. The airflow patterns vary depending on the power supply configuration.

When the fan modules are operating properly, a green LED is on at the top left corner of the fan assembly (viewed from the rear). If the fan fails, the LED turns to amber. The switch can operate with two operational fans, but the failed fan should be replaced as soon as possible to avoid a service interruption due to a second fan fault.

The WS-C3850 switches require three fans for proper cooling. The WS-C3850-48XS switches require five fans for proper cooling.

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Fan Module

Product Overview

The following illustrations show the airflow patterns for the 24- and 48-port switches. The blue arrow shows cool airflow, and the red arrow shows warm airflow.

Figure 14: 24- and 48-Port Switch Airflow Patterns

Figure 15: Airflow Patterns for the Catalyst 3850-24S-E and 3850-12S-E Switches

Figure 16: Airflow Patterns for the Catalyst 3850-48XS Switches (using Power Supplies and Fans with Blue Handles)

Figure 17: Airflow Patterns for the Catalyst 3850-48XS Switches (using Power Supplies and Fans with Red Handles)

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Product Overview

For information about installing a fan module and fan specifications, see the "Technical Specifications" chapter.

StackPower Connector

The switches have a StackPower connector for use with Cisco StackPower cables to configure a switch power stack that includes up to nine switches. A switch power stack can be configured in redundant or power-sharing mode.

You can order these StackPower cables from your Cisco sales representative:

CAB-SPWR-30CM (0.3-meter cable)

•

CAB-SPWR-150CM (1.5-meter cable)

•

For details about connecting StackPower cables and StackPower guidelines, see Planning a StackPower Stack,

on page 41.

Ethernet Management Port

You can connect the switch to a host such as a Windows workstation or a terminal server through the 10/100/1000 Ethernet management port or one of the console ports. The 10/100/1000 Ethernet management port is a VPN routing/forwarding (VRF) interface and uses a RJ-45 crossover or straight-through cable.

Note

The 10/100/1000 Ethernet management port is an RJ-45 connector that should be connected to a Windows workstation or a terminal server. Do not connect this port to another port in the same switch or to any port within the same switch stack.

The following table shows the Ethernet management port LED colors and their meanings.

Table 17: Ethernet Management Port LED

DescriptionColor

Link up but no activity.Green

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RJ-45 Console Port

The RJ-45 console port connection uses the supplied RJ-45-to-DB-9 female cable.

The following table shows the RJ-45 console port LED colors and their meanings.

Table 18: RJ-45 Console LED

Product Overview

DescriptionColor

Link up and activity.Blinking green

Link down.Off

DescriptionColor

RJ-45 console port is active.Green

Management Options

Cisco Network Assistant

•

Cisco Network Assistant is a PC-based network management GUI application for LANs. You can use the GUI to configure and manage switch clusters or standalone switches. Cisco Network Assistant is available at no cost and can be downloaded from this URL: http://www.cisco.com/pcgi-bin/tablebuild.pl/

NetworkAssistant

Cisco IOS CLI

•

You can configure and monitor the switch and switch cluster members from the CLI. You can access the CLI by connecting your management station directly to the switch console port or by using Telnet from a remote management station. See the switch command reference on Cisco.com for more information.

Cisco Prime Infrastructure

•

Cisco Prime Infrastructure combines the wireless functionality of Cisco Prime Network Control System (NCS) and the wired functionality of Cisco Prime LAN Management Solution (LMS), with application performance monitoring and troubleshooting capabilities of Cisco Prime Assurance Manager. For more information, see the Cisco Prime Infrastructure documentation on Cisco.com: http://www.cisco.com/en/

US/products/ps12239/index.html

The port is not active.Off

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CHAPTER 2

Switch Installation

For initial switch setup, assigning the switch IP address, and powering on information, see the switch getting started guide on Cisco.com.

This chapter contains these topics:

Preparing for Installation, page 33

•

Planning a Switch Data Stack, page 36

•

Data Stack Cabling Configurations, page 38

•

Planning a StackPower Stack, page 41

•

StackPower Cabling Configurations, page 42

•

Installing the Switch, page 44

•

Connecting to the StackWise Ports, page 48

•

Connecting to the StackPower Ports, page 49

•

Installing a Network Module in the Switch, page 50

•

Installing and Removing SFP, SFP+ and QSFP+ Modules, page 50

•

Connecting Devices to the Ethernet Ports, page 50

•

Where to Go Next, page 52

•

Preparing for Installation

Safety Warnings

This section includes the basic installation caution and warning statements. Read this section before you start the installation procedure. Translations of the warning statements appear in the Regulatory Compliance and Safety Information guide on Cisco.com.

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Safety Warnings

Switch Installation

Warning

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43

Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage. Statement 48

Ethernet cables must be shielded when used in a central office environment. Statement 171Warning

Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001

Read the installation instructions before connecting the system to the power source. Statement 1004Warning

Class 1 laser product. Statement 1008Warning

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017

The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device. Statement 1019

Use copper conductors only. Statement 1025Warning

This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. Statement 1028

Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

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Switch Installation

Installation Guidelines

Warning

Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040

Warning

To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of: <113°F (45°C). Statement 1047

Installation of the equipment must comply with local and national electrical codes. Statement 1074Warning

Warning

To prevent airflow restriction, allow clearance around the ventilation openings to be at least: 3 inches (7.6 cm). Statement 1076

The grounding architecture of this product is DC-isolated (DC-I).Note

Installation Guidelines

When determining where to install the switch, verify that these guidelines are met:

Clearance to the switch front and rear panel meets these conditions:

•

Front-panel LEDs can be easily read.

◦

Access to ports is sufficient for unrestricted cabling.

◦

AC power cord can reach from the AC power outlet to the connector on the switch rear panel.

◦

The SFP or SFP+ module minimum bend radius and connector length is met. See the SFP or SFP+

◦

module documentation for more information.

Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting

•

fixtures. Make sure that the cabling is safely away from other devices that might damage the cables.

For switches with the optional 1100-W power-supply module (PWR-C1-1100WAC=), first rack-mount

•

the switch before installing the power-supply module.

Make sure power-supply modules and fan modules are securely inserted in the chassis before moving

•

the switch.

When connecting or disconnecting the power cord on a switch that is installed above or below a 1100-W

•

power supply-equipped switch, you might need to remove the module from the switch to access the power cord.

Airflow around the switch and through the vents is unrestricted.

•

For copper connections on Ethernet ports, cable lengths from the switch to connected devices can be up

•

to 328 feet (100 meters).

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Box Contents

Switch Installation

Temperature around the unit does not exceed 113°F (45°C). If the switch is installed in a closed or

•

multirack assembly, the temperature around it might be greater than normal room temperature.

Humidity around the switch does not exceed 95 percent.

•

Altitude at the installation site is not greater than 10,000 feet.

•

Cooling mechanisms, such as fans and blowers in the switch, can draw dust and other particles causing

•

contaminant buildup inside the chassis, which can result in system malfunction. You must install this equipment in an environment as free from dust and foreign conductive material (such as metal flakes from construction activities) as is possible.

The switch getting started guide describes the box contents. If any item is missing or damaged, contact your Cisco representative or reseller for support.

Tools and Equipment

Obtain these necessary tools:

A Number-2 Phillips screwdriver to rack-mount the switch

•

Verifying Switch Operation

Before you install the switch in a rack, or on a table or shelf, you should power on the switch and verify that the switch passes POST. See the “Running Express Setup” section in the getting started guide for the steps required to connect a PC to the switch and to run Express Setup.

Powering Off the Switch

After a successful POST, disconnect the power cord from the switch. Install the switch in a rack, on a table, or on a shelf as described in Installing the Switch, on page 44.

Planning a Switch Data Stack

Catalyst 3850 switches can share bandwidth by using data stacking.

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Switch Installation

The following switch models do not support StackWise-480:Note

WS-C3850-48XS-S

•

WS-C3850-48XS-E

•

WS-C3850-48XS-F-S

•

WS-C3850-48XS-F-E

•

Switch Stacking and Power Stacking Guidelines

Before connecting the switches in a stack, keep in mind these stacking guidelines:

Size of the switch and any optional power-supply module. The 1100-W power-supply module is longer

•

than the other modules. Stacking switches with the same power-supply modules together makes it easier to cable the switches.

Switch Stacking and Power Stacking Guidelines

Length of cable. Depending on the configurations that you have, you might need different-sized cables.

•

If you do not specify the length of the StackWise cable, the 0.5-meter cable is supplied. If you need the 1-meter cable or the 3-meter cable, you can order it from your Cisco supplier. For cable part numbers, see StackWise Ports, on page 26. The Data Stack Cabling Configurations, on page 38 provides examples of recommended configurations.

For rack-mounted switch stacks that are members of a StackPower stack as well as a data stack, see

•

Planning a StackPower Stack, on page 41.

You can create data stacks with up to nine switches in a stack.

•

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Data Stack Cabling Configurations

Special considerations for the following switch models:Note

WS-C3850-24XS-E

•

WS-C3850-24XS-S

•

WS-C3850-24XU-E

•

WS-C3850-24XU-L

•

WS-C3850-24XU-S

•

WS-C3850-12X48U-L

•

WS-C3850-12X48U-S

•

WS-C3850-12X48U-E

•

Information:

If you set up a stack with these switches, the stack can have a maximum of 8 switches only. Each

•

of the above switch models have 4 ASIC chips, and the maximum number of ASIC chips per stack cannot exceed 32.

Switch Installation

If you set up a stack that contains the above switches and other Catalyst 3850 switches, ensure that

•

the maximum number of ASIC chips is 32.

The Catalyst WS-C3850-48XS switch models do not support power stacking.Note

Data Stack Cabling Configurations

This is an example of a recommended configuration that uses the supplied 0.5-meter StackWise cable. In this example, the switches are stacked in a vertical rack or on a table. This configuration provides redundant connections. The configuration example uses the supplied 0.5-meter StackWise cable. The example shows the full-ring configuration that provides redundant connections.

Figure 18: Data Stacking the Switches in a Rack or on a Table Using the 0.5-meter StackWise Cables

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Switch Installation

This example shows a recommended configuration when the switches are mounted side-by-side. Use the 1-meter and the 3-meter StackWise cables to connect the switches. This configuration provides redundant connections.

Figure 19: Data Stacking in a Side-by-Side Mounting

Data Stack Bandwidth and Partitioning Examples

This section provides examples of data stack bandwidth and possible data stack partitioning. The figure shows a data stack of switches that provides full bandwidth and redundant StackWise cable connections.

Figure 20: Example of a Data Stack with Full Bandwidth Connections

Data Stack Bandwidth and Partitioning Examples

This figure shows an example of a stack of switches with incomplete StackWise cabling connections. This stack provides only half bandwidth and does not have redundant connections.

Figure 21: Example of a Data Stack with Half Bandwidth Connections

The figures below show data stacks of switches with failover conditions. In this figure, the StackWise cable is bad in link 2. Therefore, this stack provides only half bandwidth and does not have redundant connections.

Figure 22: Example of a Data Stack with a Failover Condition

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Power-On Sequence for Switch Stacks

In this figure, link 2 is bad. Therefore, this stack partitions into two stacks, and the top and bottom switches become the active switch in the stack. If the bottom switch is a member (not active or standby switch), it reloads.

Figure 23: Example of a Partitioned Data Stack with a Failover Condition

Power-On Sequence for Switch Stacks

Switch Installation

Consider these guidelines before you power on the switches in a stack:

The sequence in which the switches are first powered on might affect the switch that becomes the stack

•

master.

There are two ways to elect an active switch:

•

If you want a particular switch to become the active switch, configure it with the highest priority.

•

Among switches with same priority, the switch with the lowest MAC address becomes the active switch.

If you want a particular switch to become the active switch, power on that switch first. This switch

•

remains the active switch until a reelection is required. After 2 minutes, power on the other switches in the stack. If you have no preference as to which switch becomes the active switch, power on all the switches in the stack within 1 minute. These switches participate in the active switch election. Switches powered on after 2 minutes do not participate in the election.

If changes are made to the stack without powering down the switches, the following results can occur:

If two operating partial ring stacks are connected together using a stack cable, a stack merge can take

•

place. This situation reloads the whole stack (all switches in the stack).

If some switches in the stack are completely separated from the stack, a stack split can occur.

•

A stack split can occur on a full ring stack if:

•

More than one running switch is removed without powering down.

◦

More than one stack cable is removed without powering down.

◦

A stack split can occur in a partial ring stack if:

•

A switch is removed without powering down.

◦

A stack cable is removed without powering down.

◦

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Switch Installation

Planning a StackPower Stack

In a split stack, depending on where the active and standby switches are located, either two stacks might

•

be formed (with the standby taking over as the new active switch in the newly formed stack) or all the members in the newly formed stack might reload.

Note

These results depend on how the switches are connected. You can remove two or more switches from the stack without splitting the stack.

For conditions that can cause a stack reelection or to manually elect the active switch, see the stacking software configuration guide on Cisco.com at this URL: .

Planning a StackPower Stack

StackPower Stacking Guidelines

You can configure a StackPower stack for either power sharing or redundancy. In power-sharing mode, the power of all the power supplies in the stack is aggregated and distributed among the stack members.

In redundant mode, when the total power budget of the stack is calculated, the wattage of the largest power supply is not included. That power is held in reserve and used to maintain power to switches and attached devices when one power supply fails. Following the failure of a power supply, the StackPower mode becomes power sharing.

Note

Power-sharing mode is the recommended configuration for Cisco Catalyst 9300 Series SwitchesCisco Catalyst 3850 Series Switches .

For general concepts and management procedures for switch power stacks, see the software stacking configuration guide on Cisco.com.

Before connecting the switches in a power stack, keep in mind these guidelines:

A switch power stack can include a maximum of four switches in a ring topology and nine switches in

•

a star topology.

Size of the switch and any optional power supply module. The 1100-W power-supply module is 1.5

•

inches (3.81 cm) longer than the other modules, and with the attached cable retention clip, it extends 3 inches (7.62 cm) from the switch chassis. Stacking switches with the same power-supply modules together makes it easier to cable the switches. For switch dimensions, see Appendix A, “Technical Specifications.”

Length of cable. Depending on the configurations that you have, you might need different-sized cables.

•

If you do not specify the length of the StackPower cable, the 0.3 meter cable is supplied. If you need the 1.5 meter cable, you can order it from your Cisco supplier. For cable part numbers, see StackPower

Connector, on page 31. The StackPower Cabling Configurations, on page 42 provides examples of

recommended configurations.

For rack-mounted switch stacks that are members of a data stack and a StackPower stack, see Switch

•

Stacking and Power Stacking Guidelines, on page 37.

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StackPower Cabling Configurations

This section describes the recommended cabling configurations for a StackPower stack. There are two types of StackPower cables.

The cable in the figure connects a switch to another switch in a power stack or with an XPS. StackPower cables have color bands on the cable ends:

The cable end with the green band can connect only to a switch.

•

The cable end with the yellow band can connect to a switch or an XPS.

•

The cable is available in two lengths.

Switch Installation

LengthCable TypePart Number

0.3 meterStackPower CableCAB-SPWR-30CM

1.5 meterStackPower CableCAB-SPWR-150CM

Figure 24: StackPower Cable for Use with Cisco Catalyst 9300 Series SwitchesCisco Catalyst 3850 Series Switches

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Switch Installation

StackPower Partitioning Examples

This figure shows a ring configuration using both of the supplied 0.3-meter StackPower cables and one

1.5-meter cable. In the examples that follow, the switches are stacked in a vertical rack or on a table.

Figure 25: StackPower Ring Topology

This figure shows nine switches connected in a star topology.

StackPower Partitioning Examples

These figures show StackPower stacks of switches with failover conditions.

In this figure, the StackPower cable 2 is faulty. Therefore, this stack does not provide redundancy.

Figure 26: Example of a StackPower Stack with a Failover Condition

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Installing the Switch

In this figure, StackPower port B on the center switch has failed and this stack partitions into two stacks. The top two switches share power, and the bottom switch is now a separate stack.

Figure 27: Example of a Partitioned StackPower Stack with a Failover Condition

Installing the Switch

Switch Installation

Rack-Mounting

Installation in racks other than 19-inch racks requires a bracket kit not included with the switch.

Warning

To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

Statement 1006

This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

•

When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the

•

heaviest component at the bottom of the rack.

If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing

•

the unit in the rack.

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Switch Installation

Rack-Mounting

This figure shows the standard 19-inch brackets and other optional mounting brackets. You can order the optional brackets from your Cisco sales representative.

Figure 28: Rack-Mounting Brackets

mounting, includes 19-inch brackets. (C3850-4PT-KIT=)

ETSI brackets (C3850-RACK-KIT=)3

23-inch brackets (C3850-RACK-KIT=)419-inch brackets (C3850-RACK-KIT=)1

24-inch brackets (C3850-RACK-KIT=)5Extension rails and brackets for four-point

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Rack-Mounting

Attaching the Rack-Mount Brackets

Procedure

Use four Phillips flat-head screws to attach the long side of the bracket to each side of the switch for the frontor rear-mounting positions.

Figure 29: Attaching Brackets for 19-inch Racks

Switch Installation

Front-mounting position3Rear-mounting position1

Number-8 Phillips flat-head screws2

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Switch Installation

Rack-Mounting

Figure 30: Attaching Brackets for Catalyst WS-C3850-48XS Switches

Mounting the Switch a Rack

Procedure

Step 1 Step 2

Use the four supplied Phillips machine screws to attach the brackets to the rack.

Use the black Phillips machine screw to attach the cable guide to the left or right bracket.

Front-mounting position4Phillips machine screw, black1

Number-12 or number-10 Phillips machine

5Cable guide2

screws

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Installing the Switch on a Table or Shelf

Procedure

Switch Installation

Step 1

Step 2 Step 3 Step 4

To install the switch on a table or shelf, locate the adhesive strip with the rubber feet in the mounting-kit envelope.

Attach the four rubber feet to the four circular etches on the bottom of the chassis.

Place the switch on the table or shelf near an AC power source.

When you complete the switch installation, see After Switch Installation, on page 48for information on switch configuration.

After Switch Installation

Configure the switch by running Express Setup to enter the initial switch configuration. See the switch

•

getting started guide on Cisco.com.

Use the CLI setup program to enter the initial switch configuration.

•

Connect to the stack ports.

•

Connect to the front-panel ports.

•

Connecting to the StackWise Ports

Before You Begin

Before connecting the StackWise cables, review the Planning a Switch Data Stack, on page 36. Always use a Cisco-approved StackWise cable to connect the switches.

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Switch Installation

Connecting to the StackPower Ports

Procedure

Step 1 Step 2

Step 3

Remove the dust covers from the StackWise cables and StackWise ports, and store them for future use.

Connect the cable to the StackWise port on the switch rear panel. Align the connector and connect the StackWise cable to the StackWise port on the switch rear panel and finger-tighten the screws (clockwise direction). Make sure the Cisco logo is on the top side of the connector as shown in the figure.

Connect the other end of the cable to the port on the other switch and finger-tighten the screws. Avoid overtightening the screws.

Figure 31: Connecting the StackWise Cable in a StackWise Port

Connector screw3Cisco logo1

Connector screw2

Caution

When you need to remove the StackWise cable from the connector, make sure to fully unscrew the correct screws. When the connectors are not being used, replace the dust covers.

Removing and installing the StackWise cable can shorten its useful life. Do not remove and insert the cable more often than is absolutely necessary (installing and removing it up to 200 times is supported).

Connecting to the StackPower Ports

Before You Begin

Before connecting the StackPower cables, review Planning a Switch Data Stack, on page 36. Always use a Cisco-approved StackWise cable to connect the switches. To prevent misconfiguration, the StackPower ports on the switch are keyed and have colored bands that match the keying and bands on the StackPower cable connectors.

Procedure

Step 1 Step 2

Step 3 Step 4

Remove the dust covers from the StackPower cable connectors.

Connect the end of the cable with a green band to either StackPower port on the first switch. Align the connector correctly, and insert it into a StackPower port on the switch rear panel.

Connect the end of the cable with the yellow band to another switch (to configure StackPower power sharing).

Hand-tighten the captive screws to secure the StackPower cable connectors in place.

Caution

Removing and installing the StackPower cable can shorten its useful life. Do not remove and insert the cable more often than is absolutely necessary.

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Switch Installation

Installing a Network Module in the Switch

See these sections for information on network modules:

Installing Network Modules, on page 59

•

Installing and Removing SFP, SFP+ and QSFP+ Modules

See these sections for information on SFP, SFP+ and QSFP+ modules:

Installing SFP and SFP+ Modules, on page 65

•

Removing SFP and SFP+ Modules, on page 67

•

Cisco 40-Gigabit QSFP+ Transceiver Modules Installation Note

•

Connecting Devices to the Ethernet Ports

10/100/1000 Port Connections, on page 50

•

PoE+ and Cisco UPOE Port Connections, on page 51

•

10/100/1000 Port Connections

The switch 10/100/1000 port configuration changes to operate at the speed of the attached device. If the attached ports do not support autonegotiation, you can manually set the speed and duplex parameters. Connecting devices that do not autonegotiate or that have the speed and duplex parameters manually set can reduce performance or result in no linkage.

To maximize performance, choose one of these methods for configuring the Ethernet ports:

Let the ports autonegotiate both speed and duplex.

•

Set the interface speed and duplex parameters on both ends of the connection.

•

Note

Be careful when connecting a “snagless” Ethernet cable to port 1 on a 48-port switch. The protective boot of the cable might inadvertently press the Mode button, which could cause the switch to erase its startup configuration and reboot. See this field notice for more information: http://www.cisco.com/c/en/us/support/

docs/field-notices/636/fn63697.html

This issue does not occur if you are using Cisco IOS XE Release 3E or later releases.

Auto-MDIX Connections

The autonegotiation and the auto-MDIX features are enabled by default on the switch.

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Switch Installation

PoE+ and Cisco UPOE Port Connections

With autonegotiation, the switch port configurations change to operate at the speed of the attached device. If the attached device does not support autonegotiation, you can manually set the switch interface speed and duplex parameters.

With auto-MDIX, the switch detects the required cable type for copper Ethernet connections and configures the interface accordingly.

If auto-MDIX is disabled, use the guidelines in this table to select the correct cable.

Table 19: Recommended Ethernet Cables (When Auto-MDIX is Disabled)

Device

Straight-Through CableCrossover Cable

NoYesSwitch to switch

NoYesSwitch to hub

YesNoSwitch to computer or server

YesNoSwitch to router

YesNoSwitch to IP phone

100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or Category 6 cable. 10BASE-T traffic can use Category 3 or Category 4 cable.

PoE+ and Cisco UPOE Port Connections

The 10/100/1000 PoE+ and Cisco UPOE ports have the same autonegotiation settings and cabling requirements that are described in the 10/100/1000 Port Connections, on page 50. These ports can provide PoE, PoE+, or Cisco UPOE inline power.

PoE inline power supports devices compliant with the IEEE 802.3af standard, as well as prestandard Cisco IP Phones and Cisco Aironet Access Points. Each port can deliver up to 15.4 W of PoE. PoE+ inline power supports devices compliant with the IEEE 802.3at standard, by delivering up to 30 W of PoE+ power per port to all switch ports.

See Power Supply Modules, on page 26 for the power supply modules required to support PoE, PoE+, and Cisco UPOE on 24- and 48-port switches.

Warning

Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security. Statement 1072

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Where to Go Next

Switch Installation

Warning

Caution

Voice over IP (VoIP) service and the emergency calling service do not function if power fails or is disrupted. After power is restored, you might have to reset or reconfigure equipment to regain access to VoIP and the emergency calling service. In the USA, this emergency number is 911. You need to be aware of the emergency number in your country. Statement 371

Category 5e and Category 6 cables can store high levels of static electricity. Always ground the cables to a suitable and safe earth ground before connecting them to the switch or other devices.

Noncompliant cabling or powered devices can cause a PoE port fault. Use only standard-compliant cabling to connect Cisco prestandard IP Phones and wireless access points, IEEE 802.3af, or 802.3at (PoE+)-compliant devices. You must remove any cable or device that causes a PoE fault.

Where to Go Next

If the default configuration is satisfactory, the switch does not need further configuration. You can use any of these management options to change the default configuration:

Start the Network Assistant application, which is described in the getting started guide. Through this

•

GUI, you can configure and monitor a switch cluster or an individual switch.

Use the CLI to configure the switch as a member of a cluster or as an individual switch from the console.

•

Use the Cisco Prime Infrastructure application.

•

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Installing a Network Module

Network Module Overview, page 53

•

Installing a Network Module in the Switch, page 58

•

Removing a Network Module, page 64

•

SFP and SFP+ Modules, page 65

•

Finding the Network Module Serial Number, page 67

•

Network Module Overview

CHAPTER 3

C3850-NM-4-1G

DescriptionNetwork Module

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.

Note

This is supported on the following switch models:

WS-C3850-24T/P/U

•

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-12S

•

WS-C3850-24S

•

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Network Module Overview

Installing a Network Module

C3850-NM-2-10G

C3850-NM-4-10G

DescriptionNetwork Module

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.

Note

This is supported on the following switch models:

WS-C3850-24T/P/U

•

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-12S

•

WS-C3850-24S

•

This module has four 10 G slots or four 1 G slots.

Note

This is supported on the following switch models:

WS-C3850-48T/F/P/U

•

WS-C3850-12X48U

•

C3850-NM-8-10G

C3850-NM-2-40G

WS-C3850-24XU

•

WS-C3850-12XS

•

WS-C3850-24XS

•

This module has eight 10 G slots with an SFP+ port in each slot. Each port supports a 1 G or 10 G connection

Note

This is supported on the following switch models:

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-24XS

•

This module has two 40 G slots with a QSFP+ connector in each slot.

Note

This is supported on the following switch models:

WS-C3850-12X48U

•

WS-C3850-24XU

•

WS-C3850-24XS

•

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Installing a Network Module

Network Module Overview

C3850-NM-BLANK

All network modules are hot-swappable.

Figure 32: C3850-NM-4-1G Network Module

DescriptionNetwork Module

Insert this blank module when the switch has no uplink ports (this is required for sufficient air flow).

LEDs3Captive screws1

1 G Ethernet SFP slots2

Figure 33: C3850-NM-2-10G Network Module

1 G Ethernet SFP slots3Captive screws1

LEDs41 G or 10 G Ethernet SFP+ slots2

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Network Module Overview

Figure 34: C3850-NM-4-10G Network Module

Installing a Network Module

LEDs3Captive screws1

10 G slots or 1 G Ethernet SFP slots2

Figure 35: C3850-NM-8-10G Network Module

Note

This network module has only one screw. You must fasten the screw completely to secure the module, and loosen the screw first so that the module may be removed.

10 G or 1 G SFP+ slots2

LEDs3Captive screw

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Installing a Network Module

Figure 36: C3850-NM-2-40G Network Module

Network Module LEDs

LEDs3Captive screws1

40 G QSFP+ slots2

Figure 37: Blank Network Module

Installing a Network Module in the Switch

Installing a Network Module

G4 LED4G2 LED2

Network Module Link StatusColor

Link is off.Off

Link is on; no activity.Green

Blinking green

Blinking amber

Activity on a link; no faults.

The LED will blink green even when there is very little control traffic.Note

Link is off due to a fault or because it has exceeded a limit set in the switch software.

Caution

Link for the SFP or SFP+ has been disabled.Amber

Installing a Network Module in the Switch

Safety Warnings

This section includes the installation cautions and warnings. Translations of the safety warnings appear in the Regulatory Compliance and Safety Information for the Catalyst 3850 Switches on Cisco.com: http://

www.cisco.com/go/cat3850_hw

Read this section before you install a network module.

Caution

Warning

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Proper ESD protection is required whenever you handle equipment. Installation and maintenance personnel should be properly grounded by grounding straps to eliminate the risk of ESD damage to the equipment. Equipment is subject to ESD damage whenever you remove it.

Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Do not reach into a vacant slot or chassis while you install or remove a module. Exposed circuitry could constitute an energy hazard. Statement 206

Page 71

Installing a Network Module

Equipment That You Need

Ratcheting torque screwdriver with a number-2 Phillips head that exerts up to 15 pound-force inches

•

(lbf-in.) of pressure.

Panduit crimping tool with optional controlled-cycle mechanism (model CT-720, CT-920, CT-920CH,

•

CT-930, or CT-940CH).

Wire-stripping tools.

•

12-gauge copper ground wire (insulated or not) for the single-hole ground connection.

•

8-gauge copper ground wire (insulated or not) for the dual-hole ground connection.

•

Dual-hole ground lug and two screws (included in the DC power supply accessory kit) and single-hole

•

ground lug and screw (included in the switch accessory kit). The dual-hole lug is required for the grounding of the switch in a NEBS installation where the DC supply is the only NEBS compliant power supply option.

Four leads of 14-gauge copper wire.

•

Equipment That You Need

Four fork-type terminals from the DC power supply accessory kit. The terminals must be the proper

•

size for M3 screws in a Dinkle DT-35-B25-style terminal block.

Installing Network Modules

Note

The switch can operate without a network module, but a blank module (with no ports or SFP slots) is available and should be installed when uplink ports are not required.

The switch generates logs when you insert or remove a network module with SFP slots.Note

Use only supported network modules and SFP or SFP+ modules. Each module has an internal serial EEPROM that is encoded with security information. For information about supported SFP modules, see SFP and SFP+

Modules, on page 12.

The network module is hot-swappable. If you remove a module, replace it with another network module or a blank module.

The switch complies with EMC, safety, and thermal specifications when a network module is present. If no uplink ports are required, install a blank network module.

Before You Begin

When installing network modules, observe these precautions:

Do not remove the blank module from the slot unless you are installing an SFP or SFP+ module. Either

•

a module or a dust plug must be in the slot at all times.

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Installing Network Modules

•

Procedure

Installing a Network Module

Do not remove the dust plugs from the fiber-optic SFP modules or the rubber caps from the fiber-optic cable until you connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light.

Removing and installing a network module can shorten its useful life. Do not remove and insert a network module more often than is necessary.

To prevent ESD damage, follow your normal board and component handling procedures when connecting cables to the switch and other devices.

Step 1 Step 2 Step 3

Step 4

Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.

Remove the module from the protective packaging.

Remove the blank module from the switch and save it.

Caution

Verify the correct orientation of your module before installing it. Incorrect installation can damage the module.

Caution

Do not install the network module with connected cables or installed SFP modules. Always remove any cables and modules before you install the network module.

Caution

A module interface might become error-disabled when a network module with connected fiber-optic cables is installed or removed. If an interface is error-disabled, you can reenable the interface by using the shutdown and no shutdown interface configuration commands.

Position the module face up to install it in the module slot. Slide the module into the slot until the back of the module faceplate is flush with the switch faceplate. Fasten the captive screws to secure the network module in place.

Figure 39: Installing the Network Module in the Switch

Catalyst 3850 Switch Hardware Installation Guide

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Installing a Network Module

Network Module Port Configurations

Note

Unlike other network modules, the C3850-NM-8-10G cannot be fully inserted and secured until the jackscrew is properly tightened.

Push the module into the uplink slot until the jackscrew connects with the rightmost tab.

You will feel some light resistance, because a spring-loaded tab inside the slot will push back

against the C3850-NM-8-10G module

Continue to tighten the jackscrew while gently pushing the front panel of the network module

into the slot.

Network Module Port Configurations

C3850-NM-4-1G Module

All ports in the C3850-NM-4-1G module are natively GigabitEthernet and are configured GigabitEthernet1/1/1 though GigabitEthernet1/1/4. There are only four interfaces that are valid, and the other four should not be used even though they still show up in the CLI.

Table 20: C3850-NM-4-1G Module

ActionInterface

C3850-NM-4-10G Module

All ports in the C3850-NM-4-10G module default to 10 G and should be configured as TenGigabitEthernet1/1/1 through TenGigabitEthernet1/1/4, even when you are operating them as 1 G using SFPs. Only four interfaces are valid; the other four should not be used even though they still show up in the CLI.

Configure this interfaceGigabitEthernet1/1/1

Configure this interfaceGigabitEthernet1/1/2

Configure this interfaceGigabitEthernet1/1/3

Configure this interfaceGigabitEthernet1/1/4

DisregardTenGigabitEthernet1/1/1

DisregardTenGigabitEthernet1/1/2

DisregardTenGigabitEthernet1/1/3

DisregardTenGigabitEthernet1/1/4

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Network Module Port Configurations

Table 21: C3850-NM-4-10G Module

Installing a Network Module

ActionInterface

DisregardGigabitEthernet1/1/1

DisregardGigabitEthernet1/1/2

DisregardGigabitEthernet1/1/3

DisregardGigabitEthernet1/1/4

Configure this interfaceTenGigabitEthernet1/1/1

Configure this interfaceTenGigabitEthernet1/1/2

Configure this interfaceTenGigabitEthernet1/1/3

Configure this interfaceTenGigabitEthernet1/1/4

C3850-NM-2-10G Module

In the C3850-NM-2-10G module, the first two parts are natively 1-G ports and the last two ports are natively 10-G ports. So, you configure the 1-G posts as GigabitEthernet1/1/1 through GigabitEthernet1/1/2, and configure the last two ports as TenGigabitEthernet1/1/3 through TenGigabitEthernet1/1/4, even when you are operating the last two ports as 1-G. Only four interfaces are valid, and the other four should not be used even though they still show up in the CLI.

Table 22: C3850-NM-2-10G Module

ActionInterface

Configure this interfaceGigabitEthernet1/1/1

Configure this interfaceGigabitEthernet1/1/2

DisregardGigabitEthernet1/1/3

DisregardGigabitEthernet1/1/4

DisregardTenGigabitEthernet1/1/1

DisregardTenGigabitEthernet1/1/2

Configure this interface, even when operating as 1-GTenGigabitEthernet1/1/3

Configure this interface, even when operating as 1-GTenGigabitEthernet1/1/4

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Installing a Network Module

C3850-NM-8-10G Module

All ports in the C3850-NM-8-10G module default to 10 G and should be configured as TenGigabitEthernet1/1/1 through TenGigabitEthernet1/1/8, even when you are operating them as 1 G using SFP.

Table 23: C3850-NM-8-10G Module

Network Module Port Configurations

ActionInterface

Configure this interfaceTenGigabitEthernet1/1/1

Configure this interfaceTenGigabitEthernet1/1/2

Configure this interfaceTenGigabitEthernet1/1/3

Configure this interfaceTenGigabitEthernet1/1/4

Configure this interfaceTenGigabitEthernet1/1/5

C3850-NM-2-40G Module

The default port connections for the C3850-NM-2-40G module depends on whether you use a 40 G QSFP module or a 4x10G breakout cable.

If you use a 40 G QSFP module, the ports default to 40 G interfaces. In this case, the 10 G interfaces are displayed but not used.

Table 24: C3850-NM-2-40G Module with 40 G QSFP Module

Configure this interfaceTenGigabitEthernet1/1/6

Configure this interfaceTenGigabitEthernet1/1/7

Configure this interfaceTenGigabitEthernet1/1/8

ActionInterface

Configure this interfaceFortyGigabitEthernet1/1/1

Configure this interfaceFortyGigabitEthernet1/1/2

DisregardTenGigabitEthernet1/1/1

DisregardTenGigabitEthernet1/1/2

DisregardTenGigabitEthernet1/1/3

DisregardTenGigabitEthernet1/1/4

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Removing a Network Module

If you use a 4x10G breakout cable, the ports default to 10 G interfaces.

Table 25: C3850-NM-2-40G Module with 4x10G breakout cable

Installing a Network Module

ActionInterface

DisregardTenGigabitEthernet1/1/5

DisregardTenGigabitEthernet1/1/6

DisregardTenGigabitEthernet1/1/7

DisregardTenGigabitEthernet1/1/8

ActionInterface

DisregardFortyGigabitEthernet1/1/1

Removing a Network Module

DisregardFortyGigabitEthernet1/1/2

Configure this interfaceTenGigabitEthernet1/1/1

Configure this interfaceTenGigabitEthernet1/1/2

Configure this interfaceTenGigabitEthernet1/1/3

Configure this interfaceTenGigabitEthernet1/1/4

Configure this interfaceTenGigabitEthernet1/1/5

Configure this interfaceTenGigabitEthernet1/1/6

Configure this interfaceTenGigabitEthernet1/1/7

Configure this interfaceTenGigabitEthernet1/1/8

Note

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Installing a Network Module

Procedure

SFP and SFP+ Modules

Step 1

Step 2 Step 3 Step 4

Step 5 Step 6 Step 7

Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface

Caution

Disconnect the cables from the SFP modules.

Remove the SFP modules from the network module.

Loosen the captive screws that hold the network module in place.

Note

Grasp the captive screws, and carefully slide it out of the slot.

Install a replacement network module or a blank module in the slot.

Place the module that you removed in an antistatic bag or other protective environment.

Do not remove the network module with connected cables or installed SFP modules. Always remove any cables and modules before you remove the network module.

The C3850-NM-8-10G module is held secure in the switch by only one jackscrew. This screw also helps to eject the module from its connector interface. Before the module can be removed completely, the screw must be unscrewed all the way out. When removing the screw, a spring pushes the module out when the screw is completely disengaged. Ensure that you hold the module securely until it is completely removed.

SFP and SFP+ Modules

Installing SFP and SFP+ Modules

Before You Begin

You must have an installed network module to use SFP and SFP+ modules (except for the Catalyst WS-C3850-12S and WS-C3850-24S). 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.

See the switch release notes on Cisco.com for the list of supported SFP and SFP+ modules. Use only supported 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 installing, removing, cabling, and troubleshooting SFP modules, see the module documentation that shipped with your device.

Observe these precautions:

Class 1 laser product. Statement 1008Warning

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Installing SFP and SFP+ Modules

Do not remove the dust plugs from the SFP modules or the rubber caps from the fiber-optic cable until

•

you are ready to connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light.

Removing and installing an SFP module can shorten its useful life. Do not remove and insert any SFP

•

module more often than is necessary.

To prevent ESD damage, follow your normal board and component handling procedures when connecting

•

cables to the switch and other devices.

When you insert several SFPs in multiple switch ports, wait for 5 seconds between inserting each SFP.

•

This will prevent the ports from going into error disabled mode. Similarly, when you remove an SFP from a port, wait for 5 seconds before reinserting it.

Procedure

Installing a Network Module

Step 1 Step 2

Step 3 Step 4

Step 5 Step 6 Step 7

Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.

Find the send (TX) and receive (RX) markings that identify the top of the SFP module. On some SFP modules, the send and receive (TX and RX) markings might be shown by arrows that show the direction of the connection.

If the SFP module has a bale-clasp latch, move it to the open, unlocked position.

Align the module in front of the slot opening, and push until you feel the connector snap into place.

Figure 40: Installing an SFP Module in the Network Module

If the module has a bale-clasp latch, close it to lock the SFP module in place.

Remove the SFP dust plugs and save.

Connect the SFP cables.

Figure 41: Network Module with SFP Modules Installed

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Installing a Network Module

Removing SFP and SFP+ Modules

Procedure

Removing SFP and SFP+ Modules

Step 1 Step 2

Step 3 Step 4

Step 5 Step 6

Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.

Disconnect the cable from the SFP module. For reattachment, note which cable connector plug is send (TX) and which is receive (RX).

Insert a dust plug into the optical ports of the SFP module to keep the optical interfaces clean.

If the module has a bale-clasp latch, pull the bale out and down to eject the module. If you cannot use your finger to open the latch, use a small, flat-blade screwdriver or other long, narrow instrument to open it.

Grasp the SFP module, and carefully remove it from the slot.

Place the SFP module in an antistatic bag or other protective environment.

Finding the Network Module Serial Number

If you contact Cisco Technical Assistance regarding a network module, you need to know its serial number.

Figure 42: Network Module Serial Number Location

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Finding the Network Module Serial Number

Installing a Network Module

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Power Supply Installation

Power Supply Module Overview, page 69

•

Installation Guidelines, page 73

•

Installing or Replacing an AC Power Supply, page 74

•

Installing a DC Power Supply, page 76

•

Finding the Power Supply Module Serial Number, page 82

•

Power Supply Module Overview

The switch operates with either one or two active power supply modules. A Catalyst 3850 switch that is part of a StackPower stack operates with power supplied by other stack switches.

You can use two AC modules, two DC modules, one AC and one DC module, or one module and a blank cover.

CHAPTER 4

In a NEBS installation, you can use two DC modules or one DC module and a blank cover.Note

All power supply modules have internal fans. All switches ship with a blank cover in the second power supply slot.

The following table describes the supported internal power supply modules.

Table 26: Power Supply Module Part Numbers and Descriptions

DescriptionPart Number

1100-W AC power supply modulePWR-C1-1100WAC=

715-W AC power supply modulePWR-C1-715WAC=

350-W AC power supply modulePWR-C1-350WAC=

440-W DC power supply moduleCPWR-C1-440WDC=

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Power Supply Module Overview

For information on available PoE, PoE+, and UPOE and PoE requirements, see these sections the Power

Supply Modules, on page 26.

Each AC power supply module has a power cord for connection to an AC power outlet. The 1100-W and 715-W modules use a 16-AWG cord (only North America). All other modules use an 18-AWG cord. The DC power supply module must be wired to a DC power source.

The following illustrations show the power supply modules.

Power Supply Installation

DescriptionPart Number

750-W AC power supply modulePWR-C3-750WAC-R

750-W AC power supply modulePWR-C3-750WAC-F

750-W DC power supply modulePWR-C3-750WDC-R

750-W DC power supply modulePWR-C3-750WDC-F

Blank coverPWR-C1-BLANK

Figure 43: 1100-W AC Power Supply

AC power cord connector4

Release latch51100-W AC power supply module1

Power cord retainer6AC OK LED2

Keying feature7PS OK LED3

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Power Supply Installation

Power Supply Module Overview

Figure 44: 715-W AC Power Supply

Release latch5715-W AC power supply module1

AC power cord connector4

Figure 45: 350-W AC Power Supply

Power cord retainer6AC OK LED2

Keying feature7PS OK LED3

Release latch5350-W AC power supply module1

Power cord retainer6AC OK LED2

Keying feature7PS OK LED3

AC power cord connector4

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Power Supply Module Overview

Figure 46: 440-W DC Power Supply

Power Supply Installation

Grounding terminal6440-W DC power supply module1

Release latch7AC OK LED2

Extraction handle8PS OK LED3

Terminal block safety cover9Input power terminals (positive polarity)4

Keying feature10Input power terminals (negative polarity)5

If no power supply is installed in a power supply slot, install a power supply slot cover.

Figure 47: Power Supply Slot Cover

Retainer clips2Release handles1

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Power Supply Installation

Installation Guidelines

Table 27: Switch Power Supply Module LEDs

DescriptionPS OKDescriptionAC OK

DC OK

Off

No DC input power.

Green

DC input power present.

Installation Guidelines

Observe these guidelines when removing or installing a power supply or fan module:

Do not force the power supply or fan module into the slot. This can damage the pins on the switch if

•

they are not aligned with the module.

A power supply that is only partially connected to the switch can disrupt the system operation.

•

Remove power from the power-supply module before removing or installing the module.

•

The power supply is hot-swappable. In some configurations, such as full PoE+ or power sharing mode,

•

removing a power supply causes powered devices to shut down until the power budget matches the input power of a single power supply. To minimize network interruption, hot swap the power supply under these circumstances:

OffNo AC input power.

Output is disabled, or input is outside operating range (AC LED is off).

Output is disabled, or input is outside operating range (DC LED is off).

Power output to switch active.GreenAC input power present.

Output has failed.Red

Caution

Warning

The switch is in StackPower mode and sufficient power is available.

◦

The switch is powered by other switches in a power stack, and no active backup is in progress.

◦

For the switch commands that display available power budget, see the software configuration guide.

Do not operate the switch with one power-supply module slot empty. For proper chassis cooling, both module slots must be populated, with either a power supply or a blank module.

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Statement 1024

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Installing or Replacing an AC Power Supply

Power Supply Installation

Warning

Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place.

Statement 1029

Do not reach into a vacant slot or chassis while you install or remove a module. Exposed circuitry could constitute an energy hazard.

Statement 206

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

If a Cisco external power system is not connected to the switch, install the provided connector cover on the back of the switch.

Statement 386

Installing or Replacing an AC Power Supply

Procedure

Step 1 Step 2 Step 3 Step 4

Turn off the power at its source.

Remove the power cord from the power cord retainer.

Remove the power cord from the power connector.

Press the release latch at the right side of the power supply module inward and slide the power supply out.

Do not leave the power-supply slot open for more than 90 seconds while the switch is operating.Caution

Warning

This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. Statement 1028

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Power Supply Installation

Installing or Replacing an AC Power Supply

Step 5

Insert the new power supply into the power-supply slot, and gently push it into the slot. When correctly inserted, the 350-W and 715-W power supplies (excluding the power cord retainer) are flush with the switch rear panel. The 1100-W power-supply module extends 1.5 inches from the switch rear panel.

Figure 48: Inserting the AC-Power Supply in the Catalyst WS-C3850 Switch

Figure 49: Inserting the AC-Power Supply in the Catalyst WS-C3850-48XS Switch

Step 6

(Optional) Make a loop in the power cord and thread it through the power cord retainer.

Figure 50: AC-Power Supply with Power Cord Retainer

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Installing a DC Power Supply

Figure 51: AC-Power Supply with Velcro Strap

Power Supply Installation

Velcro strap1

Step 7

Connect the power cord to the power supply and to an AC power outlet. Turn on the power at the power source.

Step 8

Confirm that the power supply AC OK and PS OK LEDs are green.

Installing a DC Power Supply

Warning

An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122

Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003

This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 20 A. Statement 1005

Warning

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

Warning

Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1086

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Power Supply Installation

The grounding architecture of this product is DC-isolated (DC-I).Note

Equipment That You Need

Ratcheting torque screwdriver with a number-2 Phillips head that exerts up to 15 pound-force inches

•

(lbf-in.) of pressure.

Panduit crimping tool with optional controlled-cycle mechanism (model CT-720, CT-920, CT-920CH,

•

CT-930, or CT-940CH).

Wire-stripping tools.

•

12-gauge copper ground wire (insulated or not) for the single-hole ground connection.

•

8-gauge copper ground wire (insulated or not) for the dual-hole ground connection.

•

Dual-hole ground lug and two screws (included in the DC power supply accessory kit) and single-hole

•

Equipment That You Need

Four leads of 14-gauge copper wire.

•

Four fork-type terminals from the DC power supply accessory kit. The terminals must be the proper

•

size for M3 screws in a Dinkle DT-35-B25-style terminal block.

Grounding the Switch

Follow these steps to install either a single-hole ground lug or a dual-hole ground lug on the switch. Make sure to follow any grounding requirements at your site.

Before You Begin

Follow the grounding procedures at your site and observe these warnings:

Warning

When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046

Follow the grounding procedure instructions, and use a UL-listed lug (included in the accessory kit).Caution

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Grounding the Switch

Power Supply Installation

Caution

Step 1

Step 2

To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect the (Management Ethernet) ports only to intra-building or unexposed wiring or cable. The intrabuilding cable must be shielded and the shield must be grounded at both ends. The intra-building port(s) of the equipment or subassembly must not be metallically connected to interfaces that connect to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.

Procedure

Use the ground lug screw and the lug ring for a single-ground connection. Use the dual-hole lug for a ground connection in a NEBS installation.

Strip the 12-gauge or 8-gauge ground wire to 0.5 inch (12.7 mm) ± 0.02 inch (0.5 mm). Stripping more than the recommended amount of wire can leave exposed wire from the connector. Use 12-gauge copper ground wire for the single-ground connection. Use 8-gauge copper ground wire for the dual-ground connection.

Figure 52: Stripping the Ground Wire

Step 3 Step 4

Slide the open end of the ground lug over the exposed area of the wire.

Using a Panduit crimping tool, crimp the ground lug to the wire.

Figure 53: Crimping the Ground Lug

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Power Supply Installation

Installing the DC Power Supply in the Switch

Step 5

Use the ground screw to attach the single-ground lug to the switch rear panel. Use two ground screws to attach the dual-hole lug to the switch rear panel.

Figure 54: Attaching the Ground Lug and Wire Assembly

Dual-hole ground adapter and dual-hole lug2Single-hole ground screw and lug ring1

Step 6 Step 7

Using a ratcheting torque screwdriver, torque the ground-lug screws to 60 lbf-in. (960 ozf-in.).

Connect the other end of the grounding wire to an appropriate grounding point at your site or to the rack.

Installing the DC Power Supply in the Switch

Before You Begin

Before installing the power supply, see the Installation Guidelines, on page 73.

Procedure

Step 1

Step 2

Turn off DC power. To ensure that power is off, change the circuit breakers to the OFF position, and tape the circuit-breaker switches in the OFF position.

Remove the plastic safety cover from the power supply terminal blocks.

Note

If you are not replacing a DC power supply, go to Step

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Installing the DC Power Supply in the Switch

Power Supply Installation

Step 3 Step 4 Step 5

Use a number-2 Phillips screwdriver to remove the DC-input power wires from the power terminals.

Press the release latch at the right side of the power supply module inward, and pull the power supply out.

Insert the power supply in the power-supply slot, and gently push it into the slot. When correctly installed, the DC power supply (excluding the extraction handle) is flush with the switch rear panel.

Figure 55: Inserting the DC-Power Supplyin the Catalyst WS-C3850 Switch

Figure 56: Inserting the DC-Power Supply in the Catalyst WS-C3850-48XS Switch

Step 6

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Connect the input power as described in Wiring the DC Input Power Source, on page 81.

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Power Supply Installation

Wiring the DC Input Power Source

Procedure

Wiring the DC Input Power Source

Step 1

Step 2

Step 3

Using a wire-stripping tool, strip each of the four wires from the DC-input power source to the appropriate length for the terminals.

Warning

Use copper conductors only. Statement 1025

Using a Panduit crimping tool, crimp the fork-type terminals to the copper conductor, 90C, 12-AWG DC power input wires.

Connect the DC-input power terminals to the terminal blocks. Make sure to match the polarity (negative to negative, positive to positive) when connecting the wires to the terminal blocks. Connect the ground wire to a grounded metal rack or to earth ground if the switch is not in a grounded rack.

Figure 57: DC Source A Isolated From Source B with No Common Ground

Figure 58: DC Source A and Source B Connections with Common Ground

Step 4 Step 5 Step 6 Step 7

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Torque all terminal block screws to 11 lbf-in.

Replace the terminal block safety cover.

Move the DC power source circuit-breakers to the ON position.

Confirm that the power supply DC OK and PS OK LEDs are green.

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Finding the Power Supply Module Serial Number

If you contact Cisco Technical Assistance regarding a power supply module, you need to know the serial number. See the following illustrations to find the serial number. You can also use the CLI to find out the serial number.

Figure 59: 1100-W AC Power Supply Serial Number

Power Supply Installation

Figure 60: 715-W and 350-W AC Power Supply Serial Number

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Installing the Fan

Fan Module Overview , page 83

•

Installation Guidelines, page 84

•

Installing a Fan Module, page 85

•

Finding the Fan Module Serial Number, page 85

•

Fan Module Overview

Depending on the switch model, three or five internal hot-swappable are available. A powered switch should always have more than one operational fan. The switch can operate with two operational fans and one nonfunctional fan, but the failed fan should be replaced as soon as possible to avoid a service interruption due to a second fan fault.

Figure 61: Fan Module for WS-C3850 Switches

CHAPTER 5

Retainer clip3Fan LED1

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Installation Guidelines

Figure 62: Fan Module for Catalyst WS-C3850-48XS Switch Models

Installing the Fan

Extraction handles4Exhaust vent2

The WS-C3850 switches require three fans for proper cooling.Note

Note

Ensure that the power supplies are inserted correctly to match the corresponding fans. Power supplies with blue handles correspond to fans with blue handles, and power supplies with red handles correspond to fans with red handles.

The WS-C3850-48XS switches require five fans for proper cooling.Note

Installation Guidelines

Observe these guidelines when removing or installing a fan module:

Do not force the fan module into the slot. This can damage the pins on the switch if they are not aligned

•

with the module.

A fan module that is only partially connected to the switch can disrupt the system operation.

•

Fan status LED (red/green)3Fan assembly levers1

Fan assembly retention latch4Fans2

The switch supports hot swapping of the fan module. You can remove and replace the module without

•

interrupting normal switch operation.

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Installing the Fan

Installing a Fan Module

Warning

Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Installing a Fan Module

Procedure

Step 1

Step 2

Pinch the fan module release handle, and slide the module out.

You should replace the fan module within 5 minutes to avoid overheating the switch.Caution

Install the fan module in the fan slot, and firmly push it into the slot, applying pressure to the end of the module, not the extraction handles. When correctly inserted, the fan module is flush with the switch rear panel. When the fan is operating, a green LED is on in the top left corner of the fan.

Warning

Figure 63: Installing the Fan Module

Do not reach into a vacant slot when installing or removing a module. Exposed circuitry is an energy hazard. Statement 206

Fan LED1

Note

Ensure that the fans are inserted correctly to match the corresponding power supplies. Fans with blue handles correspond to power supplies with blue handles, and fans with red handles correspond to power supplies with red handles.

Finding the Fan Module Serial Number

If you contact Cisco Technical Assistance regarding a fan module, you need to know the fan module serial number. See the following illustration to find the serial number.

Figure 64: Fan Module Serial Number

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Finding the Fan Module Serial Number

Installing the Fan

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Troubleshooting

Diagnosing Problems, page 87

•

Replacing a Failed Data Stack Member, page 91

•

Diagnosing Problems

The LEDs on the front panel provide troubleshooting information about the switch. They show POST failures, port-connectivity problems, and overall switch performance. You can also get statistics from Device Manager, from the CLI, or from an SNMP workstation.

Switch POST Results

POST failures are usually fatal. Contact your Cisco technical support representative if your switch does not pass POST.

CHAPTER 6

Switch LEDs

If you have physical access to the switch, look at the port LEDs for troubleshooting information about the switch. See the LED section for a description of the LED colors and their meanings.

Switch Connections

Bad or Damaged Cable

Always examine the cable for marginal damage or failure. A cable might be just good enough to connect at the physical layer, but it could corrupt packets as a result of subtle damage to the wiring or connectors. You can identify this situation because the port has many packet errors or the port constantly flaps (loses and regains link).

Examine or exchange the copper or fiber-optic cable with a known, good cable.

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Switch Connections

Look for broken or missing pins on cable connectors.

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Rule out any bad patch panel connections or media convertors between the source and the destination.

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If possible, bypass the patch panel, or eliminate faulty media convertors (fiber-optic-to-copper).

Try the cable in another port or interface, if possible, to see if the problem follows the cable.

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Remove and inspect the stack cable and stack port for bent pins or damaged connectors. If the cable is

•

bad, replace it with a known good cable.

Ethernet and Fiber-Optic Cables

Make sure that you have the correct cable for the connection.

For Ethernet, use Category 3 copper cable for 10 Mb/s UTP connections. Use either Category 5, Category

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5e, or Category 6 UTP for 10/100/1000 Mb/s connections.

For fiber-optic cables, verify that you have the correct cable for distance and port type. Ensure that the

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connected device ports match and use the same type of encoding, optical frequency, and fiber type.

Troubleshooting

For copper connections, determine if a crossover cable was used when a straight-through was required

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or the reverse. Enable auto-MDIX on the switch, or replace the cable.

Link Status

Verify that both sides have link. A single broken wire or a shutdown port can cause one side to show link even though the other side does not have link.

A port LED that is on does not guarantee that the cable is fully functional. The cable might have encountered physical stress that causes it to function at a marginal level. If the port LED does not turn on:

Connect the cable from the switch to a known good device.

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Ensure that both ends of the cable are connected to the correct ports.

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Verify that both devices have power.

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Verify that you are using the correct cable type.

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Check for loose connections. Sometimes a cable appears to be seated, but is not. Disconnect the cable

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and then reconnect it.

10/100/1000 Port Connections

A port appears to malfunction:

Use the Mode button to show the status for all ports.

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Use the show interfaces privileged EXEC command to see if the port is error-disabled, disabled, or

•

shutdown. Reenable the port if necessary.

10/100/1000 PoE+ Port Connections

A powered device connected to a PoE port does not receive power:

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Cisco Catalyst 3850 IP Services operation manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Catalyst 3850 Switch Hardware Installation Guide

CONTENTS

Preface

Document Conventions

Related Documentation

Obtaining Documentation and Submitting a Service Request

Product Overview

Switch Models

Front Panel

10/100/1000 Ports

PoE, PoE+, and Cisco UPoE Ports

SFP and QSFP Module Slots

Management Ports

USB Type A Port

Network Modules

LEDs

SFP and SFP+ Modules

SYST LED

XPS LED

Port LEDs and Modes

USB Console LED

S-PWR LED

ACTV LED

STACK LED

PoE LED

UID/Beacon LED

Network Module LEDs

Rear Panel

RJ-45 Console Port LED

StackWise Ports

Power Supply Modules

Fan Module

StackPower Connector

Ethernet Management Port

RJ-45 Console Port

Management Options

Switch Installation

Preparing for Installation

Safety Warnings

Installation Guidelines

Box Contents

Tools and Equipment

Verifying Switch Operation

Powering Off the Switch

Planning a Switch Data Stack

Switch Stacking and Power Stacking Guidelines

Data Stack Cabling Configurations

Data Stack Bandwidth and Partitioning Examples

Power-On Sequence for Switch Stacks

Planning a StackPower Stack

StackPower Stacking Guidelines

StackPower Cabling Configurations

StackPower Partitioning Examples

Installing the Switch

Rack-Mounting

Attaching the Rack-Mount Brackets

Mounting the Switch a Rack

Installing the Switch on a Table or Shelf

After Switch Installation

Connecting to the StackWise Ports

Connecting to the StackPower Ports

Installing a Network Module in the Switch

Installing and Removing SFP, SFP+ and QSFP+ Modules

Connecting Devices to the Ethernet Ports

10/100/1000 Port Connections

Auto-MDIX Connections

PoE+ and Cisco UPOE Port Connections

Where to Go Next

Installing a Network Module

Network Module Overview

Network Module LEDs

Installing a Network Module in the Switch

Safety Warnings

Equipment That You Need

Installing Network Modules

Network Module Port Configurations