Avaya 2216T User Manual
Using the Model 2216T
Ethernet Switch
Part No. 893-00980-A
December 1996
4401 Great America Parkway 8 Federal Street
Santa Clara, CA 95054 Billerica, MA 01821
© 1996 by Bay Networks, Inc. All rights reserved.
Trademarks
Bay Networks and Xylogics are registered trademarks of Bay Networks, Inc. Bay Networks Press and
Centillion are trademarks of Bay Networks, Inc. PhonePlus, Support Source, and InfoFACTS are service
marks of Bay Networks, Inc. Other brand and product names are registered trademarks or trademarks of
their respective holders.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, Bay Networks, Inc.
reserves the right to make changes to the products described in this document without notice.
Bay Networks, Inc. does not assume any liability that may occur due to the use or application of the
product(s) or circuit layout(s) described herein.
Federal Communications Commission (FCC) Statement
Note: 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. If it is not installed and used in accordance with the
instruction manual, it 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 take whatever measures may be necessary to correct the interference at their own expense.
Canadian Department of Communications Radio Frequency Statement:
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set
out in the interference-causing equipment standard entitled "Digital Apparatus," ICES-003 of the
Department of Communications.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques
de Classe A prescrites dans la norme sur le matériel brouilleur: "Appareils Numériques," NMB-003 édictée
par le ministère des Communications.
EN 55 022 Compliance Statement
This is to certify that the Bay Networks Model 2216T Ethernet Switch is shielded against the generation of
radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a.
Conformity is declared by the application of EN 55 022 Class A (CISPR 22).
Warning:
interference, in which case, the user may be required to take appropriate measures.
This is a Class A product. In a domestic environment, this product may cause radio
ii 893-00980-A
Voluntary Control Council for Interference (VCCI) Statement
This equipment is in the first category (information equipment to be used in commercial and/or industrial
areas) and conforms to the standards set by the Voluntary Control Council for Interference by Data
Processing Equipment and Electronic Office Machines that are aimed at preventing radio interference in
commercial and/or industrial areas.
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio
interference may be caused to equipment such as radios and TV receivers.
893-00980-A iii
iv 893-00980-A
Contents
Preface
Purpose ........................................................................................................................... xiii
Audience ..........................................................................................................................xiii
Conventions .....................................................................................................................xiii
Special Message Formats .........................................................................................xiv
Two-tiered Procedure Format ....................................................................................xiv
Use of Enter, Type, and Press ...................................................................................xiv
Other Conventions .................................................................................................... xv
Related Publications ........................................................................................................ xv
Ordering Bay Networks Publications ...............................................................................xvi
Bay Networks Customer Service .....................................................................................xvi
Bay Networks Information Services ................................................................................xvii
World Wide Web .......................................................................................................xvii
Customer Service FTP ............................................................................................xviii
Support Source CD .................................................................................................xviii
CompuServe ........................................................................................................... xviii
InfoFACTS .................................................................................................................xix
How to Get Help ..............................................................................................................xix
Express Technical Support from the North America TRC ......................................... xx
Chapter 1
About the Model 2216T Ethernet Switch
Features .........................................................................................................................1-2
Transparent Bridging ................................................................................................1-2
Store-and-Forward Switching ...................................................................................1-3
Spanning Tree Protocol ............................................................................................1-3
Port Mirroring ...........................................................................................................1-4
Software Download ..................................................................................................1-4
Nonvolatile Parameter Storage ................................................................................1-4
Configuration and Management Interfaces ..............................................................1-5
893-00980-A v
Physical Description .......................................................................................................1-5
Front Panel ...............................................................................................................1-6
100BASE-TX Port ..............................................................................................1-6
LEDs .................................................................................................................. 1-7
Console Port ......................................................................................................1-7
10BASE-TX Ports ..............................................................................................1-7
Back Panel ...............................................................................................................1-8
Power Connector ...............................................................................................1-8
Power Switch .....................................................................................................1-8
Fan Outlet ..........................................................................................................1-8
Chapter 2
Model 2216T Ethernet Switch Applications
Network Connectivity Guidelines ....................................................................................2-1
Cable Length ............................................................................................................2-1
Connecting to Ethernet Hubs and Network Devices ................................................2-2
Network Configuration Examples ...................................................................................2-2
Client/Server Network ..............................................................................................2-2
Backbone Connections to a 100 Mb/s Switch ..........................................................2-3
Chapter 3
Installing the Switch
Site Requirements ..........................................................................................................3-2
Unpacking the Switch .....................................................................................................3-3
Installing the Switch on a Table or Shelf .........................................................................3-3
Installing the Switch in a Rack ........................................................................................3-3
Connecting Power ..........................................................................................................3-4
Verifying Operation .........................................................................................................3-5
Connecting Network Cables ...........................................................................................3-8
Chapter 4
Configuring and Operating the Switch
Using Factory Default Settings .......................................................................................4-1
Connecting a Terminal to the Console Port ....................................................................4-2
Setting up and Monitoring the Switch .............................................................................4-5
Setting Password Protection ....................................................................................4-6
Assigning an IP Address ..........................................................................................4-7
vi 893-00980-A
Checking Network Connection Status ......................................................................4-8
Setting Advanced Options ........................................................................................4-9
Setting Switch Spanning Tree Parameters .............................................................4-11
Setting Up the Address Table .................................................................................4-12
Setting SNMP Management Access ......................................................................4-14
Viewing Switch Statistics ........................................................................................4-15
Viewing Port Statistics ............................................................................................4-16
Using the Telnet Interface for Management ..................................................................4-18
Chapter 5
Downloading Software
Downloading Software ....................................................................................................5-1
Direct Serial Download .............................................................................................5-1
TFTP Download .......................................................................................................5-4
Verifying the Upgrade .....................................................................................................5-6
Appendix A
Technical Specifications
General Specifications ................................................................................................... A-1
Port Specifications ......................................................................................................... A-3
Power Cord Specifications ............................................................................................. A-4
EC Declaration of Conformity ........................................................................................A-5
Appendix B
LEDs
Appendix C
Sample Terminal Configurations
Windows 3.1 Terminal Manager ....................................................................................C-1
Procomm Plus v2.01 .....................................................................................................C-2
Windows 95 ................................................................................................................... C-3
Appendix D
Menus and Commands
Using Configuration Menus ...........................................................................................D-1
Factory Defaults .............................................................................................................D-3
Menu Hierarchy .............................................................................................................D-4
Main Menu .....................................................................................................................D-5
893-00980-A vii
System Configuration Menu .................................................................................... D-7
Download Configuration Screen .......................................................................D-9
Advanced Options Menu ................................................................................ D-10
Port Menu ..............................................................................................................D-12
Switch Port Configuration Menu .....................................................................D-14
Statistics for Port Screen ................................................................................ D-16
Switch Configuration Menu ...................................................................................D-18
Address Table Configuration Menu .................................................................D-20
Spanning Tree Configuration Menu ................................................................D-22
Authorized Manager Menu ............................................................................. D-24
Switch Statistics Screen ........................................................................................ D-25
Appendix E
Spanning T ree Concepts
Spanning Tree Features ................................................................................................. E-2
Spanning Tree Protocol Parameters .............................................................................. E-2
Spanning Tree Protocol Operation ................................................................................. E-4
Communicating Between Bridges ........................................................................... E-4
Selecting a Root Bridge and Designated Bridges ................................................... E-4
Selecting Designated Ports ..................................................................................... E-4
Handling Duplicate Paths ........................................................................................ E-4
Remapping Network Topology ................................................................................ E-5
Appendix F
MIB Support
MIB Objects ..............................................................................................................F-1
Index
viii 893-00980-A
Figures
Figure 1-1. Front panel of the Model 2216T Ethernet Switch .....................................1-6
Figure 1-2. LEDs on the Model 2216T switch ............................................................1-7
Figure 1-3. Back panel of the Model 2216T switch ....................................................1-8
Figure 2-1. Model 2216T switch in a client/server network ........................................2-3
Figure 2-2. Backbone connections to a Model 2216T switch .....................................2-3
Figure 3-1. Installing the switch in a rack ...................................................................3-4
Figure 3-2. Connecting the power cord to the switch .................................................3-4
Figure 3-3. Turning on the power ...............................................................................3-5
Figure 3-4. Power LED ...............................................................................................3-5
Figure 3-5. Test LED ..................................................................................................3-6
Figure 3-6. Memory tests ...........................................................................................3-6
Figure 3-7. Memory test results .................................................................................3-7
Figure 3-8. Connecting an RJ-45 port on the switch ..................................................3-8
Figure 4-1. Connecting to the console port ................................................................4-3
Figure 4-2. Main Menu ...............................................................................................4-5
Figure 4-3. Switch Configuration Menu ......................................................................4-7
Figure 4-4. Port Menu ................................................................................................4-8
Figure 4-5. System Configuration Menu .....................................................................4-9
Figure 4-6. Advanced Options Menu ........................................................................4-10
Figure 4-7. Spanning Tree Configuration Menu ........................................................4-11
Figure 4-8. Address Table Configuration Menu ........................................................4-13
Figure 4-9. Switch Statistics Screen .........................................................................4-15
Figure 4-10. Port Menu ..............................................................................................4-16
Figure 4-11. Statistics for Port screen ........................................................................4-17
Figure 5-1. Download Configuration Menu .................................................................5-4
Figure B-1. LEDs on the Model 2216T switch ........................................................... B-1
Figure D-1. Sample configuration menu ....................................................................D-2
Figure D-2. Configuration menus and commands .....................................................D-4
Figure D-3. Main Menu .............................................................................................. D-5
893-00980-A
ix
Figure D-4. System Configuration Menu ....................................................................D-7
Figure D-5. Download Configuration screen ..............................................................D-9
Figure D-6. Advanced Options Menu .......................................................................D-10
Figure D-7. Port Menu .............................................................................................D-12
Figure D-8. Switch Port Configuration menu ...........................................................D-14
Figure D-9. Statistics for Port screen ....................................................................... D-16
Figure D-10. Switch Configuration Menu ................................................................... D-18
Figure D-11. Address Table Configuration Menu ....................................................... D-20
Figure D-12. Spanning Tree Configuration Menu .......................................................D-22
Figure D-13. Authorized Manager Menu ....................................................................D-24
Figure D-14. Switch Statistics Screen ........................................................................D-25
Figure E-1. Spanning Tree Protocol (STP) in a network ............................................ E-1
x
893-00980-A
Tables
Table 2-1. Cable lengths for the Model 2216T switch ...............................................2-1
Table 4-1. Factory default settings ............................................................................4-1
Table A-1. RJ-45 connector pin assignments ........................................................... A-3
Table A-2. Console port pin assignments ................................................................ A-4
Table A-3. International power cords ........................................................................ A-5
Table B-1. Meanings of Model 2216T Ethernet Switch LEDs ................................. B-2
Table D-1. Factory default settings ...........................................................................D-3
Table D-2. Commands on the Main Menu ................................................................D-6
Table D-3. Commands and fields on the System Configuration
Menu D-8
Table D-4. Commands and parameters on the Advanced Options Menu .............. D-11
Table D-5. Commands for the Port Menu ...............................................................D-13
Table D-6. Parameters on the Switch Port Configuration menu .............................D-15
Table D-7. Port statistics ......................................................................................... D-17
Table D-8. Commands and parameters on the Switch Configuration Menu ..........D-19
Table D-9. Commands on the Address Table Configuration Menu .........................D-21
Table D-10. Parameters in the Spanning Tree Configuration Menu .........................D-23
Table D-11. Switch statistics .....................................................................................D-25
Table E-1. Spanning Tree Protocol defaults ............................................................. E-3
893-00980-A xi
xii 893-00980-A
Purpose
Preface
Welcome to the Model 2216T Ethernet Switch. This switch features sixteen
10BASE-T ports and a 100BASE-X uplink port. Network performance can be
dramatically improved when a workgroup switch is used to segment 10BASE-T
hubs and provide a high-capacity 100 megabit per second (Mb/s) connection to a
server or network center.
This guide provides information about the features and capabilities of the
Model 2216T switch and includes instructions for installing the switch and setting
it up for network management.
Audience
This guide is intended for Ethernet local area network administrators with the
following background:
• Working knowledge of Ethernet local area networks (LANs)
• Bay Networks® network experience (helpful but not required)
• Familiarity with Transmission Control Protocol/Internet Protocol (TCP/IP)
and Simple Network Management Protocol (SNMP)
Conventions
This section describes the conventions used in this guide.
893-00980-A xiii
Using the Model 2216T Ethernet Switch
Special Message Formats
This guide uses the following formats to highlight special messages:
Note:
This format is used to highlight information of importance or special
interest.
Caution:
equipment failure or loss of data.
Warning:
of injury or equipment damage.
This format is used to highlight information that will help you prevent
This format is used to highlight information regarding the possibility
Two-tiered Procedure Format
The procedural steps in this guide are presented in a two-tiered format. The first tier
(numbered steps) describes the step briefly but precisely. An experienced user may
need to read only the first tier to complete the task. The second tier (lettered steps)
describes the step in more detail and may include results of performing the step.
Use of Enter, Type, and Press
This guide uses “enter,” “type,” and “press” to describe the following actions:
• When you read “enter,” type the text and press the Enter key.
• When you read “type,” type the text, but do not press the Enter key.
• When you read “press,” press only the alphanumeric or named key.
xiv 893-00980-A
Other Conventions
This guide uses the following typographical conventions:
Preface
italics
courier font
Initial Caps Menu titles and window and button names.
[Enter] Named keys in text are shown enclosed in square
[Ctrl]+C Two or more keys that must be pressed simultaneously
ALL CAPS DOS file and directory names.
Related Publications
For more information about using the Model 2216T switch, refer to the following
publications:
•
Bay Networks Guide to Understanding 100BASE-T
(Bay Networks part number 345A-1105-BK)
Book titles and UNIX file, command, and directory
names.
Screen text, user-typed command-line entries.
brackets. The notation [Enter] is used for the Enter key
and the Return key.
are shown in text linked with a plus (+) sign.
Discusses similarities between 100 Mb/s Fast Ethernet and 10BASE-T
specifications. Offers cabling information and planning advice for adding
100BASE-T to existing 10BASE-T networks.
•
Technical Reference Pocket Guide
(Bay Networks part number BR345-1298US-C)
Provides planning, installation, troubleshooting, and conceptual information
about Bay Networks products.
893-00980-A xv
Using the Model 2216T Ethernet Switch
Ordering Bay Networks Publications
To purchase additional copies of this document or other Bay Networks
publications, order by part number from Bay Networks Press™ at the following
numbers:
• Phone—U.S./Canada: 1-888-422-9773
• Phone—International: 1-510-490-4752
• Fax—U.S./Canada and International: 1-510-498-2609
You can also use these numbers to request a free Bay Networks Press catalog.
Bay Networks Customer Service
If you purchased your Bay Networks product from a distributor or authorized
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with installation, configuration, troubleshooting, or integration issues.
Customers can also purchase direct support from Bay Networks through a variety
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Region Telephone Number Fax Number
United States and
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Europe (33) 92-968-300 (33) 92-968-301
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Latin America (407) 997-1713 (407) 997-1714
xvi 893-00980-A
1-800-2LANWAN; enter Express Routing
Code (ERC) 290 when prompted
(508) 436-8880 (direct)
(508) 670-8766
In addition, you can receive information about support programs from your local
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Bay Networks Information Services
Bay Networks Information Services provides up-to-date support information as a
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This information is available from a variety of sources.
W orld Wide Web
The Bay Networks Customer Support Web Server offers a diverse library of
technical documents, software agents, and other important technical information
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A special benefit for contracted customers and resellers is the ability to access the
Web Server to perform Case Management. This feature enables your support staf f
to interact directly with the network experts in our worldwide Technical Response
Centers. A registered contact with a valid Site ID can:
Preface
• View a listing of support cases and determine the current status of any open
case. Case history data includes severity designation and telephone, email, or
other logs associated with the case.
• Customize the listing of cases according to a variety of criteria, including
date, severity, status, and case ID.
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• Create new cases for rapid, efficient handling of noncritical network
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• Communicate directly via email with the specific technical resources assigned
to your case.
The Bay Networks URL is
menu item on that home page.
893-00980-A xvii
http://www.baynetworks.com
. Customer Service is a
Using the Model 2216T Ethernet Switch
Customer Service FTP
Accessible via URL
combines and organizes support files and documentation from across the
Bay Networks product suite, including switching products from our Centillion
and Xylogics® business units. Central management and sponsorship of this FTP
site lets you quickly locate information on any of your Bay Networks products.
Support Source CD
This CD-ROM—sent quarterly to all contracted customers—is a complete
Bay Networks Service troubleshooting knowledge database with an intelligent
text search engine.
The Support Source
information from the Bay Networks Forum on CompuServe; comprehensive
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You can run a single version on Macintosh Windows 3.1, Windows 95,
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you to go directly from the CD to various Bay Networks Web pages.
CompuServe
ftp://support.baynetworks.com
SM
CD contains extracts from our problem-tracking database;
(134.177.3.26), this site
™
For assistance with noncritical network support issues, Bay Networks Information
Services maintains an active forum on CompuServe, a global bulletin-board
system. This forum provides file services, technology conferences, and a message
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The message section is monitored by Bay Networks engineers, who provide
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support documentation and software. To take advantage of CompuServe’ s recently
enhanced menu options, the Bay Networks Forum has been reengineered to allow
links to our Web and FTP sites.
xviii 893-00980-A
InfoFACTS
Preface
Bay Networks recommends the use of CompuServe Information Manager
software to access these Bay Networks Information Services resources. To open
an account and receive a local dial-up number in the United States, call
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GO BAYNET
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Outside North America, toll calls can be made to 1-408-764-1002. In Europe,
toll-free numbers are also available for contacting both InfoFACTS and
CompuServe. Please check our Web page for the listing in your country.
How to Get Help
Use the following numbers to reach your Bay Networks Technical Response
Center:
Technical Response Center Telephone Number Fax Number
Billerica, MA 1-800-2LANWAN (508) 670-8765
Santa Clara, CA 1-800-2LANWAN (408) 495-1188
Valbonne, France (33) 92-968-968 (33) 92-966-998
Sydney, Australia (612) 9927-8800 (612) 9927-8811
Tokyo, Japan (81) 3-5402-0180 (81) 3-5402-0173
893-00980-A xix
Using the Model 2216T Ethernet Switch
Express Technical Support from the North America TRC
When calling the Bay Networks North America TRC, use Express Routing Codes
140 and 144 to obtain express technical support for the Model 2216T switch.
Entering the express code expedites your call through the menuing system and
routes it directly to the support group that is best qualified to answer your
technical questions about the Model 2216T switch.
xx 893-00980-A
Chapter 1
About the Model 2216T Ethernet Switch
The Model 2216T switch is implemented as a 16-port, IEEE 802.1d-compliant
10BASE-TX Ethernet switch. This switch provides store-and-forward bridging
between all 10 megabit per second (Mb/s) 10BASE-T ports. An additional
seventeenth port on the switch allo ws a high-speed 100BASE-TX connection to a
server. Each port on the switch operates at full Ethernet wire speed with full
address and frame filtering. The switch automatically learns addresses and
maintains them in a dynamic address table for making forwarding decisions.
For network management, the Model 2216T switch includes a standardscompliant SNMP agent. This agent allows network management station
applications to collect and present status and performance information about a
switch and to perform configuration and control functions on the device.
In addition, you can manage the switch in band using the popular TCP/IP
application Telnet. A serial console port allows out-of-band management using a
standard VT100 or similar terminal.
This chapter provides the following information:
• Summary of operational features (see page 1-2)
• Physical description of the switch (see page 1-5)
893-00980-A 1-1
Using the Model 2216T Ethernet Switch
Features
The Model 2216T switch has the following operational features:
• Seventeen switched ports:
— Sixteen switched, half-duplex 10BASE-T ports
— One switched, half/full-duplex 100BASE-TX port
• Transparent bridging with support for 1024 MAC addresses
• Store-and-forward switching
• IEEE 802.1d Spanning Tree Protocol support
• Static MAC or destination address filtering
• Port mirroring that allows you to monitor network traffic through a station
port
• In-band and out-of-band interface options for configuration and management
• Industry-standard Trivial File Transfer Protocol (TFTP) for downloading ne w
switching software
• Nonvolatile storage of operating parameters
• SNMP support
• Optivity support
• LEDs to indicate switch operating conditions
Transparent Bridging
The Model 2216T switch is fully compliant with IEEE 802.1d transparent
bridging specifications. The switch automatically “learns” addresses and
maintains an aggregate address table containing 1024 entries for learning,
filtering, and forwarding. You can also provide static address entries and apply
various frame forwarding options based on destination MAC addresses in the
table. The address table and filtering options are accessed out of band through
a connection to the console port or in band using Telnet.
1-2 893-00980-A
Store-and-Forward Switching
The Model 2216T switch is a store-and-forward device. Each frame is copied into
switch memory before being forwarded to another port. This method ensures that
all forwarded frames conform to the standard Ethernet frame size and have a
correct cyclic redundancy check (CRC) for data integrity. This switching method
prevents bad frames from traversing the network and using up valuable network
bandwidth.
To minimize the possibility of dropping frames on congested ports, the
Model 2216T switch provides 2 megabytes (MB) of buffering, dynamically
allocatable among all ports. This buffer space is used to queue packets for
transmission on congested networks and represents an advantage over
“cut-through” switching technology, which drops packets immediately when
experiencing collisions.
Spanning T ree Protocol
The Model 2216T switch supports the IEEE 802.1d Spanning Tree Protocol,
which allows redundant connections to be created between LAN segments for
fault tolerance. You can create two or more physical paths through the switch
between different segments, with the Spanning Tree Protocol choosing a single
path at any given time and disabling all others. If the chosen path fails for any
reason, a disabled alternative is activated, thereby maintaining the connection.
This mechanism prevents network traffic from circulating in an endless loop
formed by multiple connections to the same LAN segment.
About the Model 2216T Ethernet Switch
The switch is shipped from the factory with spanning tree operation disabled.
You can modify spanning tree operation through the out-of-band console interface
or in band using SNMP or Telnet.
893-00980-A 1-3
Using the Model 2216T Ethernet Switch
Port Mirroring
A port mirroring feature in the switch allows the traffic transmitted and received
on a specific 10BASE-T port to be copied to a mirror port (port 1), to which you
can attach a LAN analyzer or RMON probe. You can leave the analyzer or probe
permanently connected to the mirror port and steer it to monitor any of the
remaining 15 10BASE-T ports or segments. Port mirroring for the 100BASE-T
port is not supported.
You enable the port mirroring feature through the console port. When this feature
is enabled, the port 1 LED blinks a number of times to indicate the number of the
port that it is currently mirroring.
Software Download
The Model 2216T switch supports the industry-standard Trivial File Transfer
Protocol (TFTP) for downloading switch software to the unit. All switch software
is stored in a 512 kilobyte (KB) sectored flash ROM. This feature allows you to
easily install upgrades and make changes to the unit.
The downloader software is invoked in one of the following ways:
• Out of band, using the switch serial console interface (See Chapter
“Downloading Software.”)
• In band, using Telnet (See “Using the
page 4-18.)
Telnet Interface for Management” on
5,
Nonvolatile Parameter Storage
Important operating parameters, such as IP addresses, spanning tree configuration,
and management security parameters, are stored in nonvolatile flash memory and
retain their values when the switch unit experiences power interruptions or is
powered down for normal maintenance.
1-4 893-00980-A
Configuration and Management Interfaces
The switch provides the following three interface types for management and
configuration:
• Serial console port, out of band
An RS-232 connection using a DB-9 connector allows you to connect a
VT100 terminal or PC system running a terminal application such as
Procomm Plus or Windows Terminal. For more information on managing the
switch out of band, see Chapter
and Appendix
• Telnet, in band (over Ethernet)
The switch supports management through a Telnet connection using the TCP/
IP protocols. The user interface is based on an ANSI terminal, and the menus
are the same as the menus accessed through the out-of-band serial console
attachment. See “Using the Telnet Interface for Management” on page 4-18
for more information about managing the switch using Telnet.
• SNMP-based network manager, in band
D, “Menus and Commands.”
4, “Configuring and Operating the Switch,”
About the Model 2216T Ethernet Switch
The switch can be managed using the Simple Network Management Protocol
(SNMP). Standard agent MIBs embedded in the switch provide basic SNMP
management through industry-standard SNMP applications.
T wo le vels of management security protection based on community names are
provided. The SNMP public community allows you only to read objects,
whereas the SNMP private community allo ws you to read and modify objects.
See Chapter
information about SNMP management.
4, “Configuring and Operating the Switch,” for more detailed
Physical Description
The Model 2216T switch is a desktop or rack-mountable switch that provides 16
switched 10 Mb/s ports and one switched 100BASE-TX RJ-45 uplink port. LEDs
on the front panel provide information about the operating status of the switch.
The back panel of the switch contains the power entry connector and power
switch. A fan maintains ventilation and cooling for switch internal components.
893-00980-A 1-5
Using the Model 2216T Ethernet Switch
Front Panel
MDI-X
1
Key:
1 = 100BASE-TX port
2 = LEDs
3 = Console port
4 = 10BASE-T ports
Figure
1-1 shows the front panel of the Model 2216T switch.The front panel
includes the 100BASE-TX port, LEDs, console port, and 10BASE-T ports.
2 2
Uplink Power Test
Console100 BASE-TX
3 4
65
87 1091211 1413 16152143
MDI-X
2216T Ethernet Switch
271EB
Figure 1-1. Front panel of the Model 2216T Ethernet Switch
100BASE-TX Port
A single RJ-45 connector, labeled 100BASE-TX, provides connection to an
optional 100BASE-TX Fast Ethernet network segment or end station. This UTP
port is wired as an MDI-X connection. By default, this port operates in
half-duplex mode. You can set the port for full-duplex operation to connect it
to full-duplex-capable devices.
Workstations or servers with MDI connections can be connected directly to this
port using an EIA/TIA-standard Category 5 straight-through cable. To connect a
hub or other device with an MDI-X port to this port, you must use a Category 5
crossover cable. For connector pin assignments and cable specifications, see
Appendix
1-6 893-00980-A
A, “Technical Specifications.”
About the Model 2216T Ethernet Switch
LEDs
LEDs on the front panel of the switch indicate operational and diagnostic status
for the switch (see Figure
Uplink Power Test
Console
Figure 1-2. LEDs on the Model 2216T switch
1-2).
21
150EA
For details about the operation of these LEDs, see Appendix B, “LEDs.”
Console Port
The console port is an RS-232 port implemented on a DB-9 male connector.
This port is wired as a data communication equipment (DCE) port and requires a
straight-through serial cable. Only three pins are used for transmit, receive, and
signal ground. For cable specifications, see Appendix
A, “Technical
Specifications.”
10BASE-TX Ports
Sixteen RJ-45 connectors, designated port 1 through port 16, provide connection
to 10BASE-TX Ethernet network segments. The ports are wired as half-duplex,
MDI-X connections. Workstations or servers with MDI connections can be
connected to the switch using standard straight-through unshielded twisted-pair
(UTP) cables. To connect a hub or other device with an MDI-X port to these ports,
you must use a crossover cable. For connector pin assignments, see Appendix
A,
“Technical Specifications.”
893-00980-A 1-7
Using the Model 2216T Ethernet Switch
Back Panel
The back panel on the Model 2216T switch contains the power connector, power
switch, and fan outlet (see Figure
1-3).
1
100-240V; 1.0-0.5A; 47-63HZ~
Key:
1 = Power connector
2 = Power switch
3 = Fan outlet
2 3
Figure 1-3. Back panel of the Model 2216T switch
Power Connector
Use the power connector to provide AC power to the Model 2216T switch.
For information about power requirements and power cords for use with the
switch, see Appendix
A, “Technical Specifications.”
Power Switch
The power switch allows you to turn the power on and off to a Model 2216T
Ethernet Switch without disconnecting the cord.
149EA
Fan Outlet
The fan in a Model 2216T switch draws air in through the front and sides of the
switch and discharges it through the outlet at the back of the switch. When you
install the switch, be sure to allow space at the back and sides for adequate airflow.
1-8 893-00980-A
Model 2216T Ethernet Switch Applications
This chapter provides information to help you plan a network that uses the
Model 2216T switch. The chapter includes the following topics:
• Network connectivity guidelines (see this page)
• Examples of network configurations using the Model 2216T switch
(see page 2-2)
Network Connectivity Guidelines
Chapter 2
This section discusses cabling and port requirements that you should be aware of
before installing a Model 2216T switch.
Cable Length
When you connect devices to a Model 2216T switch, follow the cable length
specifications listed in T
Table 2-1. Cable lengths for the Model 2216T switch
Port type Cable type Maximum segment length
10BASE-T Category 3 or 5 UTP 100 meters
100BASE-TX Category 5 UTP 100 meters
893-00980-A 2-1
able 2-1.
Using the Model 2216T Ethernet Switch
Connecting to Ethernet Hubs and Network Devices
When you connect the Model 2216T switch to another Ethernet switch or an
Ethernet hub, remember that all the UTP ports are configured as MDI-X
connections. Follow these guidelines for connecting the ports:
• Personal computers (PCs) and servers typically have network interface
controllers (NICs) that are configured as MDI connections. To connect these
devices, use a straight-through cable.
• Hubs and other switches typically have connectors that are configured as
MDI-X. To connect these devices, use a crossover cable, unless they have
MDI ports.
For more information about MDI-X ports, see Appendix
Specifications.”
Network Configuration Examples
The Model 2216T switch is well suited for two types of switching application:
• Desktop switching for up to 260 users in a network using 100 Mb/s switches
• Backbone connections to a 100 Mb/s switch
Client/Server Network
To improve workstation performance in a client/server environment, the
Model 2216T Ethernet Switch can be configured to provide full 10 Mb/s Ethernet
connections to individual workstations by connecting each to a dedicated switch
port (see Figure
100 Mb/s port to eliminate bottlenecks to that device.
2-1). Then the server can be placed on the higher-bandwidth
A, “Technical
2-2 893-00980-A
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