Allied Telesis AT-8116 User manual

AT-8116
Fast Ethernet Intelligent Switch
Installation Guide
PN 613-10691-00 Rev A

Copyright  1998 Allied Telesyn International Corp.
All rights reserved. No part of this publication may be reproduced without prior written
permission from Allied Telesyn International Corp.
Ethernet is a registered trademark of Xerox Corporation. UNIX is a registered
trademark in the United States and other countries licensed exclusively through X/
Open Company Limited. Novell and NetWare are registered trademarks of Novell, Inc.
Microsoft and MS-DOS are registered trademarks and LAN Manager and Windows for
Workgroups are trademarks of Microsoft Corporation. 3Com is a registered trademark
of 3Com. PC-NFS is a trademark of Sun Microsystems, Inc. PC/TCP is a registered
trademark of FTP Software, Inc. DECnet is a registered trademark of Digital
Equipment Corporation.All other product names, company names, logos or other
designations mentioned herein are trademarks or registered trademarks of their
respectives owners.
Allied Telesyn International Corp. reserves the right to make changes in specifications
and other information contained in this document without prior written notice.The
information provided herein is subject to change without notice. In no event shall Allied
Telesyn International Corp. be liable for any incidental, special, indirect, or
consequential damages whatsoever, including but not limited to lost profits, arising out
of or related to this manual or the information contained herein, even if Allied Telesyn
International Corp. has been advised of, known,or should have known, the possibility of
such damages.

iii
Electrical Safety and Installation
Requirements
STANDARDS : This product meets the following standards.
RFI Emission EN55022 Class A
WARNING : In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
Immunity EN50082-1
Electrical Safety EN60950, UL1950
SAFETY
ELECTRICAL NOTICES
WARNING : ELECTRIC SHOCK HAZARD
To prevent ELECTRIC shock, do not remove cover. No user-serviceable parts inside. This
unit contains HAZARDOUS VOLTAGES and should only be opened by a trained and qualified
technician. To avoid the possibility of ELECTRIC SHOCK disconnect electric power to the
product before connecting or disconnecting the LAN cables.
U.S. Federal Communications Commission
RADIATED ENERGY
Note: This equipment has been tested and found to comply with the limits for a Class A
digital device pursuant to Part 15 of 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 this 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 the
user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the
FCC, can void your right to operate this equipment.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian Interference-
Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.

iv
Electrical Safety and Installation Requirements
LIGHTNING DANGER
DANGER : DO NOT WORK on equipment or CABLES during periods of LIGHTNING
ACTIVITY.
INSTALLATION
ELECTRICAL—TYPE CLASS 1 EQUIPMENT
THIS EQUIPMENT MUST BE EARTHED. Power plug must be connected to a properly wired
earth ground socket outlet. An improperly wired socket outlet could place hazardous
voltages on accessible metal parts.
ELECTRICAL—CORD NOTICE
Use power cord, maximum 4.5 meters long, rated 6 amp minimum, 250V, made of HAR
cordage molded IEC 320 connector on one end and on the other end a plug approved by the
country of end use.
CAUTION : Air vents must not be blocked and must have free access to the room ambient air
for cooling.
FUSE RATING
For continued protection against risk of fire replace only with the same type and rating of
fuse.
OPERATING TEMPERATURE
This product is designed for a maximum ambient temperature of 40 degrees C.
ALL COUNTRIES : Install product in accordance with local and National Electrical Codes.

v
Table of Contents
Electrical Safety and Installation Requirements ..................................iii
Chapter 1
Introduction .....................................................................................................1
Description...........................................................................................................1
Theory of Operation.............................................................................................2
Features...............................................................................................................2
Front Panel..........................................................................................................3
Rear Panel............................................................................................................4
Power Connection................................................................................................4
Chapter 2
Installation .......................................................................................................5
Verifying Package Contents................................................................................5
Installing the AT-8116........................................................................................5
Rack Mounting ....................................................................................................6
Network Connections..........................................................................................6
Connecting an Ethernet Device to a 10Base-T or 100Base-TX Port.........6
Chapter 3
Applications and Configurations ................................................................9
Applications.........................................................................................................9
Typical Applications............................................................................................9
Configuring Your Network................................................................................11
Links Between Switches............................................................................11
Device Configuration.........................................................................................11
Appendix A
Technical Specifications .............................................................................13
Appendix B
Technical Support Fax Order ....................................................................15
Appendix C
Where To Find Us ..........................................................................................17

1
Chapter 1
Introduction
The AT-8116 is a high-performance 10/100Mbps switch representing
the next generation in switching technology. The AT-8116 employs
highly-integrated ASIC technology and a Gigabit/sec backplane to
significantly boost network performance. Its high density and
performance combine with exceptional functionality, such as RMON
support, VLAN capabilities and Full Duplex switching, to achieve
optimal network switching without expensive changes to the desktop
PC or cabling system. The AT-8116 exemplifies the design flexibility
which enables deployment as both a departmental and enterprise
switch, while enhancing network connectivity.
Description
The AT-8116 high-density switch features 16 dual-speed 10/100 UTP
ports with auto-sensing. Highly-integrated ASIC technology enables a
maximum throughput of over 2,000,000pps and 1.6 Gbps.
The switch boasts extensive management capabilities, such as the
ability to access the learning table and per/port counter statistics, and
to set configurations. Built-in RMON support for Groups 1, 2, 3, and 9
allows in-depth analysis of traffic flow, while implementation of the
Spanning Tree Algorithm prevents broadcast loops and provides fail-
safe network redundancy.
Figure 1: AT-8116 Front View
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 POWER
100M
COLN/FULL DUP
LINK
ACT
8116
10BASE-T/100BASE-TX 16 PORT ETHERNET SWITCH with Management
TERMINAL
RS232C

Introduction
2
Theory of Operation
Ethernet segment switches divide a large local network into smaller
segments, insulating each from the other’s local traffic and increasing
aggregate bandwidth, while still retaining full connectivity. The AT-
8116 is designed to be self-configuring and extremely fast, making
installation simple and providing an increase in available bandwidth.
The switch learns on which port stations are located by remembering
the source address of every packet received on every port. When
packets are received for stations that the switch has learned, they will
be forwarded to only the port on which the station is located. This is in
contrast to a hub, which sends every packet to every port.
If the switch receives a packet addressed to a station which the switch
has not learned, the packet is sent to every port, except the port on
which it was received, just as a hub would. This insures that full
connectivityismaintained.ThehighportdensityoftheAT-8116allows
for dedicated high-performance workstation links.
Features
❑ Complies with IEEE 802.3 and IEEE 802.3u standards
❑ Sixteen auto-sensing 10/100Mbps UTP ports
❑ All ports operate at wire speed with an aggregate throughput
of over 2,000,000pps
❑ Employs highly-integrated ASIC technology; high-speed
backplane design; 8 MB of buffer memory
❑ Learning table for up to 8K Mac address entries
❑ Terminal-based Command Line Interface (CLI) management
❑ Spanningtreealgorithmpreventsbroadcastloopsandprovides
fail-safe network redundancy
❑ Port-based VLAN supports broadcast domain VLANs to
eliminate network-clogging broadcast storms

AT-8116 Installation Guide
3
Front Panel
The front panel of the AT-8116 is illustrated below in Figure 2. The
following tables describe its various LEDs and components and their
functions.
Figure 2: AT-8116 Front Panel
Table 1: AT-8116 LEDs and Ports
LED Color Description
100M Green ON indicates 100Mbps mode
COLN/
FULL DUP Yellow or Green Yellow
Blinking for port collision; Green ON when
port is configured for Full Duplex
LINK Green ON indicates a valid link connection
ACT Green Blinking indicates port activity
Power Green ON indicates normal operation mode
Table 2: RJ45 and RS232 Ports
RJ45 16, RJ45 10/100 Mb UTP ports
RS232 One, RS232 connection for NMS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 POWER
100M
COLN/FULL DUP
LINK
ACT
8116
10BASE-T/100BASE-TX 16 PORT ETHERNET SWITCH with Management
TERMINAL
RS232C
RS232C 100M
COLN/Full DUP
LINK
ACT
Power

Introduction
4
Rear Panel
ThepowerconnectionandON/OFFswitcharelocatedontherearpanel
of the AT-8116. The two fan holes MUST be kept unobstructed.
Power Connection
Plug the power cord into an easily accessible outlet and turn on the ON/
OFF switch.

5
Chapter 2
Installation
The AT-8116 can operate as a stand-alone unit or in conjunction with
any of Allied Telesyn’s other Ethernet and Fast Ethernet offerings. It
supports local and SNMP management.
Verifying Package Contents
❑ AT-8116 Fast Ethernet Switch
❑ Power cord (for 110V units only)
❑ Rack-mounting brackets
❑ Null modem cable
❑ This installation guide
Installing the AT-8116
This section outlines the installation and operation of the AT-8116.
The AT-8116 comes as a 19” rack-mounted unit. However, it can be
placed in either a rack mount, using the enclosed rack-mount brackets,
or on a secure flat surface. Ensure that the unit is within reach of the
necessary connections (i.e. power outlet, Ethernet connections, and, if
the AT-8116 will be monitored via the serial port, a PC, UNIX
workstation, or modem. The unit is powered by a wide-range power
supply for either 115 - 240 VAC 50/60Hz, 0.5 A operation.
Warning
Free air flow must be maintained in order to permit adequate
cooling of the unit. FAN holes MUST be unobstructed.

Installation
6
Rack Mounting
If rack-mounted units are installed in a closed or multi-rack assembly,
they may require further evaluation by certification agencies. The
following items must be considered:
1. The ambient temperature within the rack may be greater than
room ambient temperature. Installation should be such that the
amount of air flow required for safe operation is not compromised.
The maximum temperature for equipment in this environment is
40 ° C. Consideration should be given to the maximum rated
ambient temperature.
2. Installation should be such that a hazardous stability condition is
not inadvertently created due to uneven loading.
Network Connections
Connecting an Ethernet Device to a 10Base-T or 100Base-TX Port
The 10/100Base-TX ports on the AT-8116 are designed to be connected
directly to a workstation, using a standard straight-through patch
cable. In order to cascade switches or connect a hub to the switch, a
crossover cable must be used. The RJ45 ports are defined as MDI-X
ports.
The cable connections to the 10/100 ports should be UTP Category 5,
and cable length is limited to 100 meters on each port. Figure 3 and
Figure 4 shows the pin assignments for the RJ45 connector.
Note
Cables must comply with the ANSI/TIA/EIA specification,
commonly referred to as T568A or T568B.

AT-8116 Installation Guide
7
Figure 3: Straight Cable Connection Between an AT-8116 and a Server/PC
Pin #
1
2
3
4
5
6
7
8
Pin #
1
2
3
4
5
6
7
8
TD+
TD-
RD+
RD-

Installation
8
Figure 4: Crossover Between AT-8116 and Hub or Another Switch
Pin #
1
2
3
4
5
6
7
8
Pin #
1
2
3
4
5
6
7
8

9
Chapter 3
Applications and Configurations
Applications
A switch boosts network performance by segmenting a single large
collisiondomainintosmaller,separatecollisiondomains and providing
dedicated connections for intensive networks using work stations and
servers. In addition, the Full Duplex capability of Ethernet switches
permits connectivity for backbone applications or high throughput for
high-performance dedicated servers. The AT-8116 combines 10/
100Mbps auto-sensing ports with a high-speed backplane design to
enable deployment as both a departmental and backbone switch.
Typical Applications
The AT-8116 seamlessly integrates Fast Ethernet and legacy 10Mbps
Ethernet networks, creates a high-performance collapsed Fast
Ethernet backbone and drives high bandwidth server farms and power
users. Figure 5 illustrates various connection possibilities of the
AT-8116. One switch can connect up to sixteen 10/100Mbps UTP ports.
Attachments can include 10Mbps and 100Mbps servers, a Fast
Ethernet backbone, 10/100Mbps hubs, all functioning in Half or Full
Duplex mode. Port connectivity can be over 10Base-T/100Base-TX
copper cabling. See Figure 5.

Applications and Configurations
10
Figure 5: Various Application Possibilities of the AT-8116
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 POWER
100M
COLN/FULL DUP
LINK
ACT
8116
10BASE-T/100BASE-TX 16 PORT ETHERNET SWITCH with Management
TERMINAL
RS232C
To Backbone
Local Servers
100Mbps
Shared 100Mbps
Fast Ethernet
100Mbps Stackable Hubs
Switched 10Mbps Ethernet
10/100 Ethernet Switch
100Mbps
AT-8116 10/100 Ethernet Switch

AT-8116 Installation Guide
11
Configuring Your Network
Links Between Switches
An Ethernet to Fast Ethernet switch offers the network administrator
a possible upgrade path. At first, the switch can be used simply to
segment the existing 10Mbps Ethernet, immediately boosting
performance. Next, with the addition of a Fast Ethernet NIC, a file
server can be migrated to Fast Ethernet, increasing its availability. As
needed, additional file servers or individual users can be moved to Fast
Ethernet, while leaving all other parts of the network running 10Mbps
as usual. If some of the shared Ethernet segments are still congested,
but don’t warrant a full 100Mbps, additional switches can further
divide the shared segments, creating a collapsed 100Mbps backbone
and small switched 10Mbps segments.
FastEthernet provides10 timesthe bandwidththan regularEthernet.
Software, except for low-level drivers which are always card specific,
works with Fast Ethernet without modification. Frames from a device
using Fast Ethernet require only physical layer conversion. The
AT-8116 combines switched 10/100Mbps technology in a seamless
integration of regular Ethernet and the IEEE 802.3u 100Base-TX
standard.
Device Configuration
The AT-8116 provides CLI management. The switch can autosense the
speed for each port. However, the switch must be manually configured
for the correct duplex mode.
For full information on configuring the AT-8116, see the AT-8116
User’s Guide on our website at www.alliedtelesyn.com/
manuals.htm .

13
Appendix A
Technical Specifications
Table 3 lists the AT-8116 technical specifications.
Table 3: AT-8116 Technical Specifications
Compatibility
IEEE 802.3; IEEE 802.3u (Fast Ethernet Standard)
Electrical
Rating 115 - 240 VAC, 0.5A
Frequency 50 - 60 Hz
Power Consumption- 50W
Connectors
Ethernet Ports 16, RJ45s
RS232 DB-9
Port LEDs
100M Green
ON indicates port is operating at 100Mbps
COLN/FULL DUP Yellow/Green
Yellow Blinking indicates collision/Green ON indicates Full duplex
LINK Green (ON indicates a valid link to software)
ACT Green (Blinking indicates port activity)
General LED
POWER Green
ON indicates normal operation
Learning Table 8K MAC address
Physical 3.5” x 19” x 14.65” (1.5U)

Technical Specifications
14
Weight 8 lb
Environment
Operating Temperature 40 ° C
Storage temperature 10 ° C to 50 ° C
Humidity 85% maximum, non-condensing
Standards Compliance
UL-1950; EN60500; VCCI; FCC Part 15 Class A
Table 3: AT-8116 Technical Specifications (Continued)