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1993-10-01
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LattisNet(R) Local Token Ring Bridges
Highlights
* Enable implementation of large, multi-ring Token Ring backbone
networks with high- performance bridging
* Modular and stand-alone options deliver complete configuration
flexibility
* Allow controld access to centralized resources, including file
servers and IBM hosts, through Token Ring backbone LANs
* Incorporate Madge Networks' FASTMAC technology to deliver
high-throughput 9,000- packet-per-second performance, eliminating
bottlenecks for 16 megabit per second (Mb/s) networks
* Supports multiple management options, including SNMP management of
all bridges throughout the network
* Manageable from existing IBM LAN Network Manager and NetView
stations for easy fit into existing Token Ring environments
* Designed to support emerging IEEE 802.5 Source Route Transparent
(SRT) standard for Token Ring bridging
* Monitor port enables protocol analysis of remote Token Ring
networks through local connections
* Extensive, customizable filters based on broadcast, address,
protocol and more
The LattisNet(R) local Token Ring bridge supports high-performance
interconnections between SynOptics Token Ring networks, delivering a new
level of functionality for building and managing large, compl networks.
The bridge contributes to SynOptics' complete hub-based Token Ring
connectivity and management solution by enabling customers to build
widespread networks that allow users to access centralized resources, such as
file servers and IBM hosts, through backbone LANs.
Two configurations of the bridge are available to provide maximum
flexibility. The modular Model 3522 resides in a LattisNet System 3000
concentrator to support hub-based implementations, while the stand-alone
Model 2722 links SynOptics and other IEEE 802.5- compatible devices in
geographically-dispersed environments.
Model 3522 Local Token Ring Bridge Module
The Model 3522 Local Token Ring Bridge module links independent
Token Ring networks running at 4 or 16 Mb/s, providing an integrated solution
for building large, hub-based Token Ring backbone networks.
The module links rings operating in separate hubs through an
external cable connection, enabling rings to communicate without the use of
external devices. To connect rings running within a single System 3000
concentrator, the Model 3522 links the two Token Ring busses in the
concentrator directly, eliminating the need for external connections or
cables. Each ring operates independently, with their own separate network
management and host modules.
The Model 3522, which occupies a single slot in a SynOptics Model
3000 Premises or Model 3030 Department concentrator, features a front-panel
DB-9 shielded twisted pair (STP) lobe connector for linking concentrators via
available structured cabling. For networks utilizing fiber optic backbones,
or where distances between concentrators exceed 200 meters, the LattisNet
Model 354-ST Fiber Extender can be used with the bridge to link concentrators
separated by up to two kilometers.
Model 2722 Local Token Ring Bridge
The Model 2722 Local Token Ring Bridge is a stand-alone unit that
can be used in conjunction with SynOptics' LattisRing(tm) Token Ring workgroup
hubs, as well as other IEEE 802.5- and IBM-compble MAUs. Two front-panel
DB-9 STP lobe connectors provide the interface between devices, and two local
monitor ports allow easy analysis and troubleshooting of physically-
distributed rings from a central location.
Token Ring Bridge Performance
SynOptics' local Token Ring bridges deliver some of the fastest
throughput of any available Token Ring bridge. Utilizing FASTMAC technology
from Madge Networks, the bridges forward data traffic at a rate of 9,000
packets per second (pps) - nearly triple the throughput available with
conventional Token Ring bridges. The addition of a custom-designed circuit
to accelerate transparent bridging and Content Addressable Memory (CAM) chips
to speed station address lookup enables the bridges to maintain data rates on
the most heavily-loaded rings, eliminating bottlenecks on 16 Mb/s backbone
networks.
Source Route-Transparent Bridging
The local Token Ring bridges are designed to support the emerging
IEEE 802.5 Source Route Transparent (SRT) standard, which combines the IBM
source routing algorithm with the transparent bridging commonly employed by
other protocols. The new standard, completely compatible with existing source
routing technology, will enable source-routed and non source- routed data to
be forwarded on the same network, allowing end-to-end connectivity for both
IBM and non-IBM traffic.
Since the SRT standard is not yet final, LattisNet local Token Ring
bridges currently support source route bridging only. Once the standard has
been finalized and fully tested, SynOptics will add the SRT implementation
through a software upgrade.
Bridge Management
The Model 3522 and Model 2722 local Token Ring bridges can be
managed through both SynOptics and IBM management systems, allowing them to
be seamlessly integrated into any IBM-compatible Token Ring environment and
managed from the existing management system.
The bridges are fully compatible with SynOptics' LattisNet Manager(tm)
for DOS and the UNIX-based Optivity(tm) managemstems, enabling network
managers to monitor and control bridges and hubs from the same management
station. Bridges are managed through a Telnet menu-oriented interface,
accessed by clicking on a bridge icon on the management station map. Telnet,
using the industry-standard TCP/IP protocol, enables network managers anywhere
on the ring to easily set custom filters, monitor bridge throughput, change
bridge parameters, or perform a number of other configuration and performance
monitoring functions from a single, central site. An upcoming release will
support an external Simple Network Management Protocol (SNMP) agent,
providing a standards-based solution for managing the bridges from other
SNMP-compatible management systems.
The bridges participate in SynOptics' Autotopology(tm) dynamic mapping
feature, which automatically creates and updates a real-time map of the
network topology so network managers can view all bridges in the network. The
bridges also support SynOptics' Expanded View(tm) ation, which provides a
real-time graphical image of selected devices for precise monitoring and
control.
IBM Compatibility
LattisNet local Token Ring bridges are also compatible with IBM LAN
Manager Version 2.0, enabling network managers in an SNA environment to access
and control bridging functions. IBM compatibility enables the bridge to be
installed and managed within existing IBM bridging environments, requiring no
modification to existing hardware or management procedures.
In networks using IBM's NetView, the SynOptics bridges can be
managed identically to other IBM bridges on the network via a local LAN
Network Manager console.
Other Token Ring Bridge Features
LattisNet local Token Ring bridges support a number of other features,
including:
* Customizable Filters: A customizable filtering capability allows
managers to screen out specific protocols or address ranges.
Static filters, based on hop count, frame size, station addresses,
ranges, multicast or broadcast addresses, can be selectively
filtered. Protocol filters allow managers to limit traffic to
specific networks based on NetBIOS names, as well as 12 standard
LSAP protocols and 12 standard SNAP headers.
* Local Monitor Port: A front-panel RJ-45 local monitor port enables
LAN analyzers such as the LattisNet Model 3040 Network Control
Engine(tm) or the Network General Sniffer(tm) to directly monitor Token
Ring networks attached through bridged lobe connections. By
accommodating locally-attached ans, the port allows network
managers to monitor traffic on all bridged rings without requiring
a physical attachment to remote hubs.
* Flash EPROM Local Image: On-board Flash EPROM allows the bridges
to boot locally without requiring a network server. Flash EPROM
also allows a locally-stored boot image to be easily updated when
revisions become available, enabling new software to be installed
without requiring any hardware changes. Downloading of software
images is accomplished through standard BOOTP/TFTP protocols, used
on all SynOptics management stations. For large bridged networks,
this allows new software images to be installed on a single
management station and downloaded across the network to each bridge.
Flash EPROM also allows all user-configured parameters to be stored
locally in non- volatile memory, enabling bridges to resume operation with
the same configuration following a power failure.
* Local Console Port: An RS-232 port accommodates local consoles such
as ASCII terminals for performing bridge management in the wiring
closet.
* Front-panel LEDs: A series of front-panel LEDs report bridge
configuration and status conditions at a glance.
LattisNet Local Token Ring Bridges
Specifications
Data Rates
16 Mb/s or 4 Mb/s differential Manchester encoding, IEEE 802.5
Compatibility
IEEE 802.5 Token Ring access method and physical layer
specifications
IBM compatible
Main Processor
25 Mhz 68030
Forwarding Table Size
4,096 entries total
Frame Length
16 - 17,408 bytes
Forwarding Rate
9,000 frames per second max
Frame Filter Rate (Transparent Bridging)
21,000 frames per second max at 4 Mb/s
85,000 frames per second max at 16 Mb/s
Memory
1 Mb Program RAM
1 Mb Shared I/O memory
1 Mb Flash EPROM
128 Kb battery backed up NVRAM for local parameter storage
Electrical Specifications
Power Consumption:
Model 3522: 40 watts @ +5V; 2 watts @ +/-12V
Model 2722: 44 watts
Thermal rating:
Model 3522: 136 Btu/hr max
Model 2722: 13.5 Btu/hr max
Environmental Specifications
Operating temperature: 5*C to 40*C; storage temperature: -25*C to
70*C
Operating humidity: 85% max relative humidity; storage humidity:
95% max relative humidity
Operating altitude: 10,000 ft (3,048 m), 40*C max
Free fall/drop: ISO 4180-2, NSTA 1A
Vibration: IEC 68-2-6/34
Stock/bump: IEC 68-2-27/29
Physical Dimensions
Model 3522: (H) 15 in x (W) 1.2 in x (D) 10.5 in [(H) 38.1 cm x
(W) 3.1 cm x (D) 26.7 cm]
Model 2722: (H) 3.5 in x (W) 17.3 in x (D) 16 in [(H) 8.9 cm x
(W) 43.8 cm x (D) 40.6 cm]
Weight
Model 3522: 4.0 lbs (1.8 kg)
Model 2722: 3.0 lbs (1.4 kg)
Flammability
PCB designed to meet UL 94-V1
Electromagnetic Emissions
Meets FCC Part 15, Subpart J, Class A and B
Meets EN 55 022 (CISPR 22: 1985), Class B
Meets General License VDE 0871, Class B (AmtsblVfg 243/1991,
46/1992)
Meets VCCI Class 1 ITE
Electromagnetic Susceptibility
Electrostatic discharge (ESD): IEC 801-2, Level 2/4
Radiated electromagnetic field: IEC 801-2, Level 2
Electrical fast transient/burst: IEC 801-4, Level 2/3
Electrical surge: IEC 801-5, Level 1/3
Safety Agency Approvals
UL listed (UL 1950)
CSA certified (CSA 22.2, #950)
TUV licensed (EN 60 950)
Corporate Headquarters
SynOptics Communications, Inc.
4401 Great America Parkway
Santa Clara, CA 95054
Tel (408) 988-2400
Fax (408) 988-5525
LattisRing, LattisNet Manager, Optivity, Autotopology, Expanded View and
Network Control Engine are trademarks and LattisNet and SynOptics
Communications are registered trademarks of SynOptics Communications, Inc.
Other brand and product names are trademarks or registered trademarks of
their respective holders.
DA505-165US-B
Caption:
SynOptics' Model 3522 and Model 2722 Local Token Ring Bridges allow
internetworking from each floor to a backbone network, easing backbone access
and improving overall network performance.