SMSC SMC6516TF, SMC6516TT, SMC6516FF User Manual

TigerSwitch 16

Intelligent bandwidth acceleration for workgroups

Ethernet and Fast Ethernet Workgroup Switches

◆ Three models, each with 16 10BASE-T ports plus:

◆ Two 100BASE-TX ports

◆ Two 100BASE-FX ports

◆ One 100BASE-TX port and one 100BASE-FX port

◆ Manageable in-band via SNMP, RMON and Telnet

User Guide

USER GUIDE

FOR SMC’S

TIGERSWITCH 16

FAMILY

July 1997

Pub. # 900.185 Rev. A

Standard Microsystems Corporation

80 Arkay Drive

Hauppauge, New York 11788

Information furnished by Standard Microsystems Corporation
(SMC) is believed to be accurate and reliable. However, no
responsibility is assumed by SMC for its use, nor for any
infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of SMC. SMC
reserves the right to change specifications at any time without
notice.

Copyright © 1997 by

Standard Microsystems Corporation

Hauppauge, New York.

All rights reserved. Printed in U.S.A.

Trademarks:

SMC and Standard Microsystems are registered trademarks; and EliteView, EtherEZ,
EtherPower, EZ Hub, TigerStack and TigerSwitch are trademarks of Standard Microsystems
Corporation. Other product and company names are trademarks or registered trademarks
of their respective holders.

Limited Warranty

HARDWARE: Standard Microsystems Corporation (“SMC”) warrants these

TigerSwitch 16 units to be free from defects in workmanship and materials,
under normal use and service, for the following length of time from the date of
purchase from SMC or its Authorized Reseller:

TigerSwitch 16 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Three Years

If a product does not operate as warranted during the applicable warranty
period, SMC shall, at its option and expense, repair the defective product or
part, deliver to Customer an equivalent product or part to replace the defective
item, or refund to customer the purchase price paid for the defective product.
All products that are replaced will become the property of SMC. Replacement
products may be new or reconditioned. Any replaced or repaired product or
part has a ninety (90) day warranty or the remainder of the initial warranty
period, whichever is longer.

SMC shall not be responsible for any custom software or firmware, configura­tion information, or memory data of Customer contained in, stored on, or
integrated with any products returned to SMC pursuant to any warranty.

SOFTWARE: SMC warrants that the software programs licensed from it will
perform in substantial conformance to the program specifications for a period
of ninety (90) days from the date of purchase from SMC or its Authorized
Reseller. SMC warrants the magnetic media containing software against failure
during the warranty period. No updates are provided. SMC’s sole obligation
hereunder shall be (at SMC’s discretion) to refund the purchase price paid by
Customer for any defective software products or to replace any defective media
with software which substantially conforms to SMC’s applicable published spec­ifications. Customer assumes responsibility for the selection of the appropriate
applications program and associated reference materials. SMC makes no war­ranty that its software products will work in combination with any hardware or
applications software products provided by third parties, that the operation of
the software products will be uninterrupted or error free, or that all defects in
the software products will be corrected. For any third party products listed in
the SMC software product documentation or specifications as being compatible,
SMC will make reasonable efforts to prove compatibility, except where the
non-compatibility is caused by a “bug” or defect in the third party’s product.

STANDARD WARRANTY SERVICE: Standard warranty service for hardware
products may be obtained by delivering the defective product, accompanied
by a copy of the dated proof of purchase, to SMC’s Service Center or to an
Authorized SMC Service Center during the applicable warranty period. Standard
warranty service for software products may be obtained by telephoning SMC’s
Service Center or an Authorized SMC Service Center, within the warranty
period. Products returned to SMC’s Service Center must be pre-authorized by

LIMITED WARRANTY

SMC with a Return Material Authorization (RMA) number marked on the out­side of the package, and sent prepaid, insured, and packaged appropriately for
safe shipment. The repaired or replaced item will be shipped to Customer, at
SMC’s expense, not later than thirty (30) days after receipt by SMC.

WARRANTIES EXCLUSIVE: IF AN SMC PRODUCT DOES NOT OPERATE AS
WARRANTED ABOVE, CUSTOMER’S SOLE REMEDY SHALL BE REPAIR,
REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID, AT SMC’S
OPTION. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE
AND ARE IN LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS
OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR
OTHERWISE, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANT­ABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SMC NEITHER
ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY
OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAIN­TENANCE OR USE OF ITS PRODUCTS.

SMC SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND
EXAMINATION DISCLOSE THE ALLEGED DEFECT IN THE PRODUCT DOES
NOT EXIST OR WAS CAUSED BY CUSTOMER’S OR ANY THIRD PERSON’S
MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED
ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF
THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER
HAZARD.

LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT
OR TORT (INCLUDING NEGLIGENCE) SHALL SMC BE LIABLE FOR INCIDEN­TAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF
ANY KIND, OR FOR LOSS OF REVENUE, LOSS OF BUSINESS, OR OTHER
FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE,
INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR INTER­RUPTION OF ITS PRODUCTS, EVEN IF SMC OR ITS AUTHORIZED RESELLER
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. NOTHING
HEREIN SHALL HAVE THE EFFECT OF LIMITING OR EXCLUDING SMC’S
LIABILITY FOR DEATH OR PERSONAL INJURY CAUSED BY NEGLIGENCE.

Some states do not allow the exclusion of implied warranties or the limitation
of incidental or consequential damages for consumer products, so the above
limitations and exclusions may not apply to you. This warranty gives you spe­cific legal rights which may vary from state to state. Nothing in this warranty
shall be taken to affect your statutory rights.

Standard Microsystems Corporation

80 Arkay Drive

Hauppauge, NY 11788

516-273-3100

TABLE OF CONTENTS

Compliances.......................................................... v

1 Quick Start...................................................... 1-1

Introduction ......................................................................... 1-2

Connecting the Switch......................................................... 1-3

Configuring the Switch for SNMP and Telnet

Management .................................................................... 1-5

2 About the Switches ........................................ 2-1

Overview.............................................................................. 2-3

Features and Benefits.......................................................... 2-12

Switch Architecture.............................................................. 2-13

Switch Operation................................................................. 2-15

Management Options .......................................................... 2-16

3 Planning......................................................... 3-1

Benefits of Switching........................................................... 3-2

Segmenting the Network..................................................... 3-4

Full-Duplex Operation ........................................................ 3-5

Sample Applications............................................................ 3-6

4 Installing ........................................................ 4-1

Selecting a Site..................................................................... 4-2

Equipment Checklist............................................................ 4-3

Mounting.............................................................................. 4-4

Connecting to the Console Port.......................................... 4-6

Connecting to a Power Source ........................................... 4-7

Diagnostic Self-Tests............................................................ 4-8

Making Network Connections ............................................ 4-9

Default Settings.................................................................... 4-13

i

TABLE OF CONTENTS

5 Configuring and Monitoring ........................ 5-1

The Console Interface ......................................................... 5-3

Typical Configuration Operations ...................................... 5-25

Typical Monitoring Operations........................................... 5-32

Using Telnet......................................................................... 5-34

Using SLIP............................................................................ 5-35

6 Managing Via SNMP and RMON.................... 6-1

SNMP Protocol..................................................................... 6-2

Using RMON........................................................................ 6-3

MIB Objects ......................................................................... 6-3

A Cables ............................................................. A-1

Specifications ....................................................................... A-2

10BASE-T/100BASE-TX Pin Assignments........................... A-3

Serial Console Port Pin Assignments.................................. A-5

B Specifications................................................. B-1

Specifications ....................................................................... B-2

C Sample Configuration ................................... C-1

Introduction ......................................................................... C-2

Windows Terminal............................................................... C-3

D Troubleshooting ............................................ D-1

Troubleshooting Chart......................................................... D-2

ii

TABLE OF CONTENTS

List of Figures

Figure 1-1. Main Menu....................................................... 1-4

Figure 1-2. Switch Configuration Menu ............................ 1-5

Figure 1-3. IP Configuration Menu.................................... 1-6

Figure 1-4. SNMP Configuration Menu.............................. 1-7

Figure 2-1. TigerSwitch 16 Model SMC6516TT with

two 100BASE-TX Ports..................................................... 2-3

Figure 2-2. TigerSwitch 16 Model SMC6516FF with

two 100BASE-FX Ports..................................................... 2-3

Figure 2-3. TigerSwitch 16 Model SMC6516TF with

one 100BASE-TX Port and one 100BASE-FX Port.......... 2-3

Figure 2-4. 10BASE-T Ports................................................ 2-5

Figure 2-5. SMC6516FF with 100BASE-FX Ports............... 2-6

Figure 2-6. RJ-45 Integrated LEDs...................................... 2-7

Figure 2-7. Vertical LED Array and Port Select Button..... 2-8

Figure 2-8. Console Port and Reset Button....................... 2-9

Figure 2-9. Power Supply Receptacles.............................. 2-10

Figure 2-10. Power Supply LEDs........................................ 2-10

Figure 3-1. Single-Segment LAN........................................ 3-6

Figure 3-2. Microsegmented LAN...................................... 3-7

Figure 3-3. Switched LAN .................................................. 3-8

Figure 3-4. Sample Application with Model SMC6516TT. 3-9
Figure 3-5. Sample Application with Model SMC6516TF. 3-10
Figure 3-6. Sample Application with Model SMC6516FF. 3-11

Figure 4-1. Attaching the Brackets .................................... 4-4

Figure 4-2. Installing the Switch in a Rack........................ 4-5

Figure 4-3. Attaching the Adhesive Feet........................... 4-5

Figure 4-4. Console Port .................................................... 4-6

Figure 4-5. Power Receptacles........................................... 4-7

Figure 4-6. Diagnostics Display......................................... 4-8

iii

TABLE OF CONTENTS

Figure 4-7. Connecting Fiber Cable................................... 4-12

Figure 5-1. Main Menu....................................................... 5-4

Figure 5-2. Switch Configuration Menu ............................ 5-5

Figure 5-3. Configuration Display Screen ......................... 5-7

Figure 5-4. IP Configuration Menu.................................... 5-9

Figure 5-5. SNMP Configuration Menu.............................. 5-11

Figure 5-6. Spanning Tree Configuration Menu ............... 5-12

Figure 5-7. Address Aging Configuration Menu ............... 5-13

Figure 5-8. Port Mirroring Configuration Menu................ 5-14

Figure 5-9. Port Configuration Menu................................. 5-15

Figure 5-10 Port Summary Display Screen........................ 5-16

Figure 5-11. Port Summary Configuration Menu.............. 5-17

Figure 5-12. Port [x] Configuration Menu.......................... 5-18

Figure 5-13. Statistics Menu ............................................... 5-19

Figure 5-14. Utilities Menu................................................. 5-20

Figure 5-15. Console Configuration Menu........................ 5-22

Figure 5-16. Boot Menu ..................................................... 5-23

Figure 5-17. Telnet Menu................................................... 5-24

Figure 5-18. TFTP Loader Menu........................................ 5-30

Figure 5-19. IP Configuration Menu.................................. 5-35

Figure A-1. RJ-45 Connector Pin Numbers........................ A-3

iv

COMPLIANCES

FCC A

This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
interference to radio communications. It has been tested and found to comply
with the limits for a Class A computing device pursuant to Subpart B of Part 15
of FCC Rules, which are designed to provide reasonable protection against such
interference when operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference, in which case the
user, at his own expense, will be required to take whatever measures may be
required to correct the interference.

Canada Department of Communications - Class A

This digital apparatus does not exceed the Class A limits for radio noise emis­sions from digital apparatus as 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.

EC Conformity

This information technology product was found to comply with EC General
Directives 89/336/EEC and 73/23/EEC. An EC Declaration of Conformity was
issued for this product by:

Standard Microsystems (Europe) Limited

1st Floor, Pyramid House, Easthampstead Road

Bracknell, Berkshire RG12 1NS, United Kingdom

Japan VCCI Class 1

Australia AS/NZS 3548 (1995)

SMC contact for products in Australia is:
SMC Australia Pty. Ltd., ACN 069 351 613

LVL 66 MLC Center
Martin Place
Sydney NSW 2000
Phone: [phone]
Fax: [phone]

v

CHAPTER 1

QUICK START

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Connecting the Switch . . . . . . . . . . . . . . . . . . 1-3

Configuring the Switch for SNMP and Telnet

Management . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1-1

QUICK START

Introduction

SMC’s TigerSwitch™16 family consists of a set of three manage­able Ethernet switches with Fast Ethernet connection capability.
Each switch provides sixteen 10BASE-T ports for connection to
Ethernet hubs, servers and workstations. Each switch also
includes two ports for connection to Fast Ethernet devices. The
switch, depending on the model chosen, will contain either two
100BASE-TX ports, two 100BASE-FX ports or one 100BASE-TX
port and one 100BASE-FX port. The Fast Ethernet port types
found on each model are listed below:

◆ Model SMC6516TT

• two 100BASE-TX ports with Auto-Negotiation

◆ Model SMC6516FF

• two 100BASE-FX ports

◆ Model SMC6516TF

• one 100BASE-TX port with Auto-Negotiation

• one 100BASE-FX port

This chapter provides a set of instructions designed to help you
get up and running quickly and without excessive details. The
steps in each of the two sections refer to other locations in the
manual where further information may be found.

The first section, “Connecting the Switch,” provides a list of
instructions for powering up the switch and making network
connections, and also for setting up a PC to configure and
monitor the switch out-of-band.

The second section, “Configuring the Switch for SNMP and
Telnet Management,” discusses the steps required to set up the
switch for in-band management.

1-2

Connecting the Switch

1. Power up the PC to be used to configure and monitor the

switch out-of-band. After loading this PC with communica­tions software, set your terminal or communications program
to the following parameters: 9600, n, 8, 1 (9600 baud, no
parity, 8 data bits, 1 stop bit). (See Appendix C for the
Windows Terminal program parameter settings.)

2. Plug the female end of a DB-9 standard null-modem cable

into the Console connector on the front panel of the switch.
Attach the other end of the cable to the serial connector on
the PC (typically COM1 or COM2). (See “Connecting to the
Console Port” in Chapter 4.)

3. Connect one end of the 3-pin AC power cord supplied with

the switch to the power receptacle on the rear of the chassis,
and the other end to a grounded power outlet. (See
“Connecting to a Power Source” in Chapter 4.) Make note of
the diagnostic test results that appear on the PC attached to
the Console port.

QUICK START

4. If you have purchased a Redundant Power Unit (RPU), plug

the 14-pin connector from the RPU cable into the mating
connector on the rear panel of the switch. (See the guide
supplied with the RPU.)

5. Connect the front-panel 10BASE-T ports to hubs, servers and

power users. Once a valid connection has been made, the
green LED above the port will light. (See “Making Network
Connections” in Chapter 4.)

6. Connect each front-panel 100BASE-TX and 100BASE-FX port

to a Fast Ethernet power user, server, workgroup or back­bone. When a valid connection has been made, the green
LED for that port will light. (See “Making Network
Connections” in Chapter 4.)

1-3

QUICK START

7. Press the Esc key on the terminal or PC. The Main Menu
will appear on the screen.

___________________________________________________

>>>> Main Menu <<<<

1. Switch Configuration Menu

2. Port Configuration Menu

3. Statistics Menu

4. Utilities Menu

5. Exit Menus (Password Protect)

Enter Selection:

___________________________________________________

Figure 1-1. Main Menu

You may now set a variety of configuration options, such as full­duplex mode on the 10BASE-T ports, a password for the
Console interface, and Spanning Tree and Address Aging para­meters. You may also select various options for monitoring the
performance of the unit out-of-band. These are described in
Chapter 5.

To set up the unit for in-band management via SNMP or Telnet,
continue with Step 8.

1-4

Configuring the Switch for
SNMP and Telnet Management

8. To assign an IP address, or to have one assigned automati­cally, select “Switch Configuration Menu” from the Main
Menu. The Switch Configuration Menu will appear.

___________________________________________________

>>>> Switch Configuration Menu <<<<

1. Configuration Summary

2. IP Configuration

3. SNMP Configuration

4. Spanning Tree Configuration

5. Address Aging Configuration

6. Port Mirroring Configuration

<ESC> To Exit Menu
Enter Selection:

___________________________________________________

Figure 1-2. Switch Configuration Menu

QUICK START

9. DHCP is enabled by default. If you have a DHCP server, an
IP address and Subnet Mask are assigned automatically.
Make a note of the IP address and skip to Step 12.
Otherwise, select “IP Configuration” from the menu. The IP
Configuration Menu will appear (see Figure 1-3).

10. To manually enter the IP address of the switch, you must
first disable DHCP. Then, select “Switch IP Address” from
the menu and enter the address to be assigned to the switch.
This should be an administratively assigned address. (See
“Configuring the IP Address” in Chapter 5.)

11. Select “Subnet Mask” from the menu and enter the subnet
mask for the IP address entered in Step 10. If applicable,
also enter the Gateway IP address.

1-5

QUICK START

___________________________________________________

>>>> IP Configuration Menu <<<<

1. Automatic Selection of IP Address (DHCP).. [ ON]

2. Switch IP Address.. ............. [ 170.129. 78. 28 ]

3. Default SNMP Manager IP Address.. [ 170.129. 78.208 ]

4. Default Gateway IP Address....... [ 170.129. 78. 1 ]

5. Subnet Mask...................... [ 255.255.255. 0 ]

6. SLIP Enable...................... [ Disabled ]

7. SLIP IP Address.................. [ 0. 0. 0. 0 ]

8. SLIP Subnet Mask..... ........... [ 255. 0. 0. 0 ]

<ESC> To Exit Menu
Enter Selection:

___________________________________________________

Figure 1-3. IP Configuration Menu

12. For Telnet Management: Connect to the IP address

assigned in Step 10. Installation is complete.

13. For SNMP Management: Check to be sure the manage-

ment console and the switch use the same SNMP read-only
and write community names. For the switch, both names
are factory-set to “public.” If the name “public” is also used
for both management console names, connect to the IP
address assigned in Step 10 and then skip to Step 15.
Otherwise, continue with Step 14.

14. If the community names need to be changed, press the Esc
key to return to the Switch Configuration Menu (see Figure
1-2). Then select “SNMP Configuration” to display the SNMP
Configuration Menu (see Figure 1-4).

15. Select “SNMP Get Community Name” from the menu and
enter the new read-only access community name (up to 10
alphanumeric characters). Then, select “SNMP Set
Community Name” and enter the new write access commu-

1-6

QUICK START

nity name (up to 10 alphanumeric characters).

___________________________________________________

>>>> SNMP Configuration Menu <<<<

1. SNMP Get Community Name ( 10 characters max ).....[ public ]

2. SNMP Set Community Name ( 10 characters max ).....[ public ]

3. System Location ( 24 characters max ).. [ ]

4. System Name ( 24 characters max )...... [ ]

5. System Contact ( 24 characters max )... [ ]

<ESC> To Exit Menu
Enter Selection:

___________________________________________________

Figure 1-4. SNMP Configuration Menu

16. Compile the MIB file into the SNMP network management
platform. This file, supplied with the switch on a 3.5 inch
floppy diskette, provides access to the private MIB exten­sions for the switch. Installation is complete.

1-7

CHAPTER 2

ABOUT THE SWITCHES

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Ports and Status LEDs . . . . . . . . . . . . . . . . 2-5

10BASE-T Ports . . . . . . . . . . . . . . . . . . . 2-5

100BASE-TX Port(s) . . . . . . . . . . . . . . . . 2-5

100BASE-FX Port(s) . . . . . . . . . . . . . . . . 2-6

Link and Select LEDs . . . . . . . . . . . . . . . 2-7

Shared Vertical LED Array and

Port Select Button . . . . . . . . . . . . . . . . . 2-8

Console Port . . . . . . . . . . . . . . . . . . . . . . . 2-9

Reset Button . . . . . . . . . . . . . . . . . . . . . . . 2-9

Optional Redundant Power Unit . . . . . . . . 2-9

Power Supply Receptacles and Status LEDs 2-10

Features and Benefits . . . . . . . . . . . . . . . . . . . 2-12

Switch Architecture . . . . . . . . . . . . . . . . . . . . 2-13

Buffered Switching . . . . . . . . . . . . . . . . . . 2-13

Automatic Address Learning . . . . . . . . . . . . 2-13

Spanning Tree Protocol . . . . . . . . . . . . . . . 2-14

Switch Operation . . . . . . . . . . . . . . . . . . . . . . 2-15

Diagnostic Tests . . . . . . . . . . . . . . . . . . . . 2-15

Software Downloads . . . . . . . . . . . . . . . . . 2-15

2-1

ABOUT THE SWITCHES

Non-volatile Parameter Storage . . . . . . . . . 2-15

Management Options . . . . . . . . . . . . . . . . . . . 2-16

Serial Console Interface . . . . . . . . . . . . . . . 2-16

Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

2-2

ABOUT THE SWITCHES

Overview

SMC’s TigerSwitch 16 is a family of intelligent Ethernet work­group switches that offers both an increase in network
performance plus an economical solution for anyone planning
to integrate Fast Ethernet into their Ethernet LAN. In addition to
sixteen 10BASE-T ports, these switches provide two Fast
Ethernet ports. Depending on the model chosen, the switch
will include either two 100BASE-TX ports with Auto-Negotiation,
two 100BASE-FX ports or one 100BASE-TX port with Auto­Negotiation and one 100BASE-FX port.

The three TigerSwitch 16 models are shown below:

Figure 2-1. TigerSwitch 16 Model SMC6516TT with

two 100BASE-TX Ports

Figure 2-2. TigerSwitch 16 Model SMC6516FF with

two 100BASE-FX Ports

Figure 2-3. TigerSwitch 16 Model SMC6516TF with

one 100BASE-TX Port and one 100BASE-FX Port

2-3

ABOUT THE SWITCHES

The Fast Ethernet ports on each switch are contained in a sin­gle, dual-port replaceable module.* This modular design allows
you the option of installing different types of Fast Ethernet
ports, according to your changing network needs.

The available slide-in replacement modules are listed below:

Slide-in Fast Ethernet Modules

Model Ports

100BASE-TX 100BASE-FX

SMC6016TT 20
SMC6016FF 02
SMC6016TF 11

All the switches employ a buffered “store-and-forward” architec­ture that performs error checking to prevent bad packets from
being propagated throughout the network. Their non-blocking
design allows simultaneous wire-speed transport of multiple
packets at consistently low latency on all ports. And, they
feature full-duplex operation to double the bandwidth of those
desktop and switch connections.

In addition to “at-a-glance” LEDs, these switches feature an
integrated scalable management set that includes out-of-band
management via an RS-232 console port, in-band management
via Telnet or any SNMP-based manager, support for 4-group
RMON, and Port Mirroring for full RMON support with an
external probe or for traffic analysis via any network lanalyzer.
This enables you to choose the level of management that’s right
for you.

The TigerSwitch 16 family also supports an optional Redundant
Power Unit to minimize downtime in the event of an internal
power supply or AC circuit failure.

* Note: The switch will not POST (Power On Self-Test) without a

module installed.

2-4

ABOUT THE SWITCHES

Ports and Status LEDs

10BASE-T Ports

The sixteen 10BASE-T ports are located on the front panel of
each switch. These ports are labeled with an “x” to indicate that
they have a built-in crossover.*

If a 10BASE-T port is connected directly to an Ethernet server,
power user or another switch, it will provide the device with a
dedicated bandwidth—20 Mbps in full-duplex mode or 10 Mbps
in half-duplex mode. If the port is connected to an Ethernet
hub, it will provide the hub with a 10 Mbps bandwidth that can
be shared by multiple users.

Figure 2-4. 10BASE-T Ports

100BASE-TX Port(s)

Models SMC6516TT and SMC6516TF are equipped with at least
one 100BASE-TX port (port 18). Port 17 on model SMC6516TT
is another 100BASE-TX port.

Like the 10BASE-T ports, each 100BASE-TX port is labeled with
an “x” to indicate that it has a built-in crossover.* In addition,
the 100BASE-TX ports support Auto-Negotiation, so the optimum
operating mode—half or full duplex and 10 or 100 Mbps—is
selected automatically.

* Workstations and servers can be connected to these ports with

straight-through cable. When connecting hubs and other switches to
these ports, a crossover cable will probably be necessary. Please see
Appendix A for cabling information.

2-5

ABOUT THE SWITCHES

When connected to a 10BASE-T device, the port will operate at
10 Mbps, providing each switch with an additional Ethernet port
(two ports on the SMC6516TT). When connected to a 100BASE­TX device, the port will operate at the higher data rate, allowing
for the easy integration of Fast Ethernet into an Ethernet LAN.

If a 100BASE-TX port is connected directly to a Fast Ethernet
server, power user or another switch, it will provide the device
with a dedicated bandwidth—200 Mbps in full-duplex mode or
100 Mbps in half-duplex mode. If the port is connected to a
Fast Ethernet hub, it will provide the hub with a 100 Mbps
bandwidth that can be shared by multiple users.

100BASE-FX Port(s)

Ports 17 and 18 on TigerSwitch 16 model SMC6516FF and port
17 on model SMC6516TF are 100BASE-FX ports with SC connec­tors. In full-duplex mode, these ports can be connected to a
corporate backbone or central site with up to 2 km of fiber
cable.

Figure 2-5. SMC6516FF with 100BASE-FX Ports

2-6

ABOUT THE SWITCHES

Link and Select LEDs

Each of the RJ-45 connectors on the 10BASE-T and 100BASE-TX
ports has dual integrated LEDs. The left LED displays the port’s
Link status. If this LED is lit (green), it indicates that the con­nection between the port and the attached device is good. The
right LED, when lit (yellow), indicates that the full status of the
port (Receive, Collision, Full Duplex and 100 Mbps data rate) is
displayed by the shared vertical LED array (see “Shared Vertical
LED Array and Port Select Button” on the next page).

Figure 2-6. RJ-45 Integrated LEDs

The 100BASE-FX ports have individual Link and Select LEDs that
perform the same functions.

The Link and Select LEDs are described in the following table:

Link and Select LEDs

Function Condition Description

Link Off Port is not in use, attached device is

not powered on, or port has been
disabled via SNMP or Console port

Blinking* Connection between port on switch

and attached device is bad

Green Connection between port on switch

and attached device is good

Select Y ellow Port is selected to drive the vertical

LED array

*Note: The Link LEDs on unconnected ports will blink approximately
once every 5 seconds. This blinking reflects background diagnostics
run automatically by the switch and is not indicative of any error.

2-7

ABOUT THE SWITCHES

Shared V ertical LED Array and Port Select Button

At power-up, the shared vertical LED array displays the status of
port 1. To display the status of port 2, press the Port Select but­ton located to the right of the array. Repeated depressions of
this button will cycle through all eighteen ports.

Figure 2-7. Vertical LED Array and Port Select Button

The vertical LED array is described in the following table:

Vertical LED Array

Function Condition Description

Receive Green Data is being received
Collision Yellow Two or more devices on the segment

are transmitting at the same time

Full Yellow Port configured for full-duplex
Duplex operation (available on all ports)

100 Mbs Yellow Port is operating at 100 Mbps data rate

Off Port is operating at 10 Mbps data rate

2-8

ABOUT THE SWITCHES

Console Port

Each switch contains a Console port on the front panel. This is
an RS-232 serial port with a DB-9 connector. When connected
to a PC, this port can be used to configure the switch and to
monitor the switch out-of-band and in-band via Telnet.

Figure 2-8. Console Port and Reset Button

Reset Button

The front panel of each switch contains a Reset button. This
button is used to restart the switch. It has almost the same
effect as powering the switch off and on again. The only
difference is that the internal diagnostics which are initiated at
power up are not executed on reset.

Optional Redundant Power Unit

SMC’s Redundant Power Units (RPUs) are separate devices and
each has its own own power cord. These devices can supply
power to the switch in the event of a failure of the internal
power supply. Contact your reseller for advice regarding the
appropriate RPU for your specific application.

2-9

ABOUT THE SWITCHES

Power Supply Receptacles and Status LEDs

There are two power receptacles on the rear of each switch.
The standard receptacle labeled “Power” is for the AC power
cord. The 14-pin receptacle labeled “DC Input” is for the
optional Redundant Power Unit (RPU).

Figure 2-9. Power Supply Receptacles

Power and RPU LEDs located on the front panel of each switch
indicate the status of both the internal and redundant power
supplies. These LEDs are described on the following page.

Figure 2-10. Power Supply LEDs

2-10

ABOUT THE SWITCHES

Power Supply Status LEDs

LED Condition

Power Redundant Status

Power

Off Off No AC power
Green Off Internal power supply is operating

properly; redundant power supply
is not present or has been
disconnected

Green Green Both internal and redundant power

supplies are operating properly

Red Green Internal power supply has failed;

device is being powered by
redundant power supply

Red Off Redundant power supply has

failed; device is being powered by
internal power supply

2-11

ABOUT THE SWITCHES

Features and Benefits

• IEEE 802.3 and 802.3u compliance ensures compatibility
with standards-based hubs, adapters and switches from any
vendor

• Non-blocking architecture allows multiple simultaneous
switching paths for increased throughput

• Filters and forwards at line-rate speed on all ports for high
performance

• “Store-and-forward” switch design increases reliability of
transmission by checking each packet for validity before for­warding it to its destination

• Automatic address learning with user-defined aging elimi­nates need to configure addresses manually

• 8,192 entry address table can store addresses for moderate
to large size networks

• SNMP agent for management by SMC’s EliteView™or any
other SNMP-based application

• RS-232 Console port simplifies switch configuration and
allows switch to be managed out-of-band

• 4-group RMON support - Event, Alarm, Statistics and History
groups - for pro-active management

• Port Mirroring for full RMON support with external probe or
for traffic analysis with network lanalyzer

• Spanning Tree Protocol adds fault tolerance by allowing
redundant paths to be created between LAN segments

• Software downloads to Flash ROM via TFTP or Console port

• Optional Redundant Power Unit (attached to a separate
circuit) minimizes downtime in the event of an internal
power supply failure

• Replaceable dual-port Fast Ethernet modules for added
flexibility

2-12

ABOUT THE SWITCHES

Switch Architecture

Buffered Switching

Each TigerSwitch 16 unit is a “store-and-forward” device. Every
packet it receives is stored in a buffer so it can be checked for
validity before being forwarded to another port. In addition, the
switches feature a non-blocking design that allows simultaneous
wire-speed transport of multiple packets at consistently low
latency.

Automatic Address Learning

An aggregate address table that can hold 8,192 entries is
provided for learning, filtering and forwarding. Addresses are
automatically learned by each TigerSwitch 16 unit and main­tained in the address table to enable the switch to perform filter­ing and forwarding at line-rate speeds. When a packet contain­ing a destination address that does not appear in the table is
encountered, the packet is broadcast to all segments.

Packets are filtered if their destination address is on the same
segment as their source address. By confining network traffic to
its respective collision domain, filtering reduces the overall traf­fic on the network.

2-13