The document describes the LANNET LEB-200 and LEB-200S Fast Ethernet backbone link modules. The modules provide a reliable, high-speed connection between LANswitch Plus hubs or between LANswitch Plus and Visage or Meritage hubs, with redundancy. The LEB-200 supports links up to 2 km while the LEB-200S supports links up to 15 km. The modules use ASIC-based switching technology to deliver wire-speed throughput and integrate easily into existing Ethernet networks.

1. LANNET LANswitch Plus LEB-200/S
Fast Ethernet Backbone Link
H I G H - P E R F O R M A N C E S W I T C H I N G A N D
R E L I A B L E B A C K B O N E W I T H R E D U N D A N C Y
The LEB-200 and LEB-200S provide a reliable, high-speed full-duplex connection,
allowing more flexible, bottleneck-free switched network design. The LEB-200 supports
links of up to two km while the LEB-200S supports links of up to 15 km.
he demands placed on today’s
networks are increasing day by
day. Organizations are demanding
that their networks cope with growing
numbers of users as well as new applications
based on client/server technology, multi-
media, and collaborative computing.
Traditional network technologies cannot
provide the bandwidth needed to support
this growing use of information technology.
As a result, they are beginning to place
limits on users’ productivity.
The LANNET LEB-200 and LEB-200S
Fast Ethernet backbones are part of
LANNET’s modular switched Fast
Ethernet product line which provides the
ideal upgrade path from shared Ethernet,
through switched Ethernet, to ATM.
The modularity and reliability of this
fiber-optic, full-duplex module make it an
ideal tool for building collapsed backbones
and centralizing resources with all the
attendant benefits.
L A N S W I T C H P L U S M AT C H E S U S E R N E E D S
The LEB-200 modules are members of
LANNET’s award-winning family of
LANswitch Plus modules that provide
reliable, cost-effective solutions to today’s
demands for increased network
performance.
The LEB-200 series integrates easily
into existing Ethernet networks, allowing
organizations to selectively enhance
network performance in response to
increasing user needs. The result is an
economical, gradual migration to high-speed
switching that leverages your investment in
existing network infrastructure to the
fullest.
I N V E S T M E N T P R O T E C T I O N
The LEB-200/S, along with other
LANswitch Plus products, allows the
network manager to increase the
performance of the existing Ethernet
network by migrating to switched Fast
Ethernet. This technology permits network
managers to leverage their existing
equipment, applications and knowledge to
the maximum.
M O D U L A R
S W I T C H I N G
The LEB-200 and
LEB-200S provide a
fast, reliable
backbone connection
with redundancy
between LANswitch
Plus hubs or
LANswitch Plus and
Visage or Meritage
hubs.
T

2. E N D - T O - E N D S W I T C H E D E T H E R N E T
Until now, narrow bandwidths made
centralizing resources less efficient.
Centralizing resources makes network
management easier, more reliable, and
cheaper – the LEB-200 series is designed
precisely for this application.
The LEB-200/S Fast Ethernet backbone
link delivers high-speed connectivity without
protocol conversion. In the department,
network managers can use LANNET
LANswitch Plus LSE-series Ethernet
switching modules to connect workstations
to the hubs. Then the department hub can
be connected to a collapsed backbone hub
with the LEB-200/S. Servers can be
attached to the collapsed backbone hub
with LFE-4004S or LFE-100 Fast Ethernet
modules. Alternately, Visage workgroup
switching hubs are connected to the central
hub via a Visage Fast Ethernet switch.
W I R E – S P E E D T H R O U G H P U T
Like all LANNET LANswitch Plus
modules, the LEB-200 and LEB-200S are
equipped with ASIC-based switching
technology that delivers low latency
throughput and ensures full non blocking
access under any load conditions.
The LEB-200/S keep local traffic local.
Local traffic does not saturate the backbone
connection, reducing the load on the mission-
critical data links in the network.
L A N S W I T C H PPLLUUSS A D VA N C E D F E AT U R E S
Performance of the LEB-200 and LEB-200S
is further enhanced by the ATM-like
features included in every LANswitch Plus
module: congestion management, priority,
and fairness.
C O N G E S T I O N M A N A G E M E N T
LANswitch Plus guarantees the delivery of
each packet by effectively controlling
overload conditions. At any level of traffic
load, even under the highest bandwidth
demanding conditions, no-packet-loss is
ensured by the unique congestion
management mechanisms built into every
LANswitch Plus module.
This mechanism prevents the “snowball”
effect which arises when packets are lost
due to congestion and retransmitted packets
start clogging the network.
The LEB-200 and LEB-200S extend
flow control over the full-duplex Fast
Ethernet backbone link, providing end-to-
end flow control.
LANNET
LANswitch
Plus LEB-200
Fast Ethernet
Backbone
Link with
Redundancy
The LEB-200 is used as a high-
speed backbone link with
redundancy within a building,
and to connect a remote site
with Visage hubs to the same
central resources.
10 Mbps
10 Mbps
100 Mbps
Visage 24T
Meritage 1400
Visage 16200F
Local Servers
15 km
Fast Ethernet
File Servers
Fast Ethernet Uplink
with Redundancy
LANswitch
Backbone
Plus
LANswitch
LET-20
Plus
Enterprise
ATM Backbone
ATM 155 Mbps
LEB-200
LEB-200S
LEB-200S

3. L E B - 2 0 0 V S . L E B - 2 0 0 S
The difference between the two modules is
the maximum supported link length. The
LEB-200 supports fiber-optic links of up to
two kilometers; the LEB-200S supports
links of up to 15 kilometers.
P R I O R I T Y A N D FA I R N E S S
LANNET LANswitch Plus has built-in
fairness and priority mechanisms that
guarantee the transmission of high-priority
packets to their addresses on time, without
affecting the delivery of non-prioritized
data.
Using fairness, LANswitch Plus
maintains balanced, non-proliferating traffic
from all switch ports which eliminates
pressure points in the switch.
LANswitch Plus prioritization allows the
network manager to assign priorities to
specific sources of packets (e.g.,multimedia
and real-time applications), ensuring the
optimal availability of network resources.
Prioritization provides the isochronous
service required for multimedia and other
delay-sensitive applications. What’s more,
LANswitch Plus delivers these features
using standard NICs, drivers, and cabling,
and serves as an end-to-end extension for
ATM Quality of Service standards.
V I R T U A L L A N N E T W O R K I N G
The LEB-200 series extends VLANs
(logically defined workgroup) from the hub
across the entire network. VLANs allow
users within logical groups to work together
regardless of their physical network
connection.
FA U LT- T O L E R A N C E
In today’s competitive world, a failure in a
network can cost a company large amounts
of money. Network managers need one
hundred percent reliability from their
networks. The fiber-optic redundant ports,
combined with a mature technology (Fast
Ethernet) provide the reliability network
mangers need for mission-critical connections.
F U L LY M A N A G E A B L E
To keep a switched network running smoothly,
network managers must be able to effectively
monitor and troubleshoot the switch.
The LEB-200 series is fully monitored and
managed by SMONMaster,™ LANNET’s
switch monitoring application which works
in conjunction with MultiMan,™
LANNET’s comprehensive SNMP-based
network management system. SMONMaster
passively monitors all traffic traversing the
Cellenium™ Bus, giving network managers
a top-down perspective of activity in the
switch.
Using the global view, network managers
can quickly pinpoint problematic areas in
the switch, and then zoom in on specific
hosts or individual sessions in order to
analyze them in more detail.
Montage and SMONMaster are fully
integrated with such popular management
platforms as HP OpenView/Windows,
HP OpenView/UNIX, and IBM NetView.
AT M W I T H I N V E S T M E N T P R O T E C T I O N
The LEB-200 series constitutes a key step
on the path to future high-speed
applications.
The module is fully compliant with Fast
Ethernet standards, allowing network
managers to integrate faster technology
into existing networks without replacing
equipment.
Integrating mature, faster technology
will allow the development of new
applications and broadening of experience
and knowledge. This integration allows the
network manager to set the pace of
upgrading and implement emerging
technologies, such as ATM, when and where
it is necessary, while extending the life of
the existing network.
LANNET gives organizations the
flexibility to adopt high-speed switching at
their own pace. In fact, only LANswitch
Plus hubs provide easy coexistence and
migration from shared LANs to switched
LANs to ATM, with no hub or backplane
upgrade.
LANNET
LANswitch
Plus LEB-200
Fast Ethernet
Backbone
Link with
Redundancy

4. C U S T O M E R S U P P O R T W I T H O U T L I M I T S
The LEB-200 and LEB-200S Fast Ethernet
segment switches are backed by
LANNET’s expertise in networking and a
worldwide network of Value Added
Resellers.
Customers can also download
information from the LANNET World
Wide Web home page
(http://www.lannet.com).
The LEB-200 and LEB-200S modules
come with a one-year hardware warranty.
P R O D U C T S P E C I F I C AT I O N
I N T E R FA C E S
I/O Ports: Two 100BASE-FX SC fiber-optic
connectors
Link Length:
LEB-200: 2 kilometers
LEB-200S: 15 kilometers
S I G N A L I N G A N D P R O T O C O L
IEEE 802.3 standard for Fast Ethernet (100BASE-FX )
P H Y S I C A L C H A R A C T E R I S T I C S
Dimensions (h,w,d): 253mm x 20mm x 232mm
Hub Slots: Occupies one slot in hub
P O W E R R E Q U I R E M E N T S
Consumption: 3.5 Amps @ 5 VDC
E N V I R O N M E N TA L
Operating
Temperature: 0-40 degrees Celsius
Humidity: 5% to 95% non-condensing
A G E N C Y A P P R O VA L
EMC: FCC Part 15, subpart B, class A,
EN55022 Class B, EN50082-1, CE
Safety: PCB designed to meet UL94-V0
F R O N T PA N E L I N D I C AT O R S
Front Panel LEDs: Traffic sent/received
Management mode
Collision
Full/half duplex
Port status
Redundancy status
Inter-switch link
O R D E R I N G I N F O R M AT I O N
PA R T N O . D E S C R I P T I O N
860170 LANswitch Plus LEB-200
Fast Ethernet Backbone Link
860171 LANswitch Plus LEB-200S
Single Mode Fast Ethernet
Backbone Link
Specifications subject to change without notice.
LANNET
LANswitch
Plus LEB-200
Fast Ethernet
Backbone
Link with
Redundancy
Israel
LANNET Ltd.
Atidim Technology Park
Building 3
Tel-Aviv 61131
Israel
Tel +972 3 645 8458
Fax +972 3 648 7146
http://www.lannet.com
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LANNET Inc.
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Los Gatos, CA 95032
USA
Tel 1-888-ETHERNET
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LANNET, the LANNET logo, Cellenium, LANswitch, Montage, MultiNet, SMON, TerrainMaster, and Visage are trademarks, and in some jurisdictions may be registered
trademarks, of LANNET Ltd., Madge Networks or its affiliated companies. Other trademarks appearing in this document are the property of their respective owners.
© Copyright 1998 LANNET. All Rights Reserved. 143010 Rev. 0 2/98