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OpenLAN Secure Local MAC Bridge¶

ND110587

![Photo: Secure Local MAC Bridge device]

ND OpenLAN

ND Norsk Data

Page 2¶

OpenLAN¶

Introduction¶

The ND 110587 OpenLAN Secure Local MAC Bridge (OL-SLMB) is a high-performance, protocol-transparent Ethernet-to-Ethernet bridge. It interconnects two Ethernet (IEEE 802.3) segments (Cheapernet or Thick Ethernet) using transceiver cables to create a local area network (LAN) that extends beyond Ethernet's size restriction.

A data-link level (ISO Layer 2) bridge, the OL-SLMB routes packets based on Ethernet addresses only. It continuously monitors traffic on the network, filtering and discarding messages addressed to local stations, and forwarding only inter-LAN packets. Since the OL-SLMB is protocol-independent, data can be passed between Ethernets that are running incompatible high-level protocols such as XNS, TCP/IP, DECnet, OSI, and COSMOS.

The OL-SLMB isolates excess inter-LAN traffic and protects network security through a programmable filtering feature. Custom filters can be used to discard packets based on specific Ethernet addresses. Arbitrary masks on byte, word, or double-word boundaries can be set up to filter specific packets, allowing the network manager to increase network performance and restrict inter-network access.

                             +---+  
                             |OWS|
                             +---+  
                               |    
                           +---+---+ 
                           | ND Host |
                           +---+---+
                               |
                               | Tr.
                               |
                          +----+----+
                          |OL-SLMB  |
                          +----+----+
                               |
                             -------
                            |Transceiver|
                             -------
                               |
                  +-----------+  +-----------+
                  |Tr.        |  |Tr.        |
                  |          |   |           |
                +---+      +---+       +----+
                |OWS|      |ND |       |Host|
                +---+      +---+       +----+

The OL-SLMB interconnects two Ethernet segments using transceiver cables, linking Office Workstations and Norsk Data host computers.

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OpenLAN¶

Features¶

Separate yet Integrated Networks¶

The OL-SLMB allows you to separate local area network segments, while still allowing communication between them. This can be done either for security or performance purposes. Only inter-segment traffic, with a destination on the other side of the bridge, is forwarded.

Security Filters¶

The OL-SLMB can be programmed to filter communications in situations where security is of importance. Custom filters can be set up to discard packets based on source or destination addresses. Traffic can be filtered based on arbitrary masks on any packet byte, word, or double word.

Auto-Learning¶

The OL-SLMB continuously and dynamically learns which stations are local and which are remote by simply listening to the traffic on the network. This greatly simplifies installation and reconfiguration of network stations.

Integrated Network Management¶

An interactive, sophisticated network management system is built in. Commands are available to configure system parameters, set custom filters, specify routing information, and display performance and throughput statistics.

Stand-alone System¶

The OL-SLMB is completely self-contained and requires no additional host support. Its integrated network management features can be accessed directly through a local console port.

High-Performance Architecture¶

Two multiple high-speed 68000 processors allow the bridge to filter local traffic at 7,000 packets per second and forward inter-LAN traffic at up to 2,500 packets per second.

Protocol Transparency¶

Operating at the data-link level, the bridge is protocol-transparent. A multi-vendor network can be set up to pass among multiple Ethernets.

Technical Specifications¶

Multiple 68000 processor architecture.
Two intelligent Ethernet controllers.
High-performance main processor for packet processing.

Network Interface¶

Baseband 10Mbps IEEE 802.3-compatible Ethernet

Power Requirements¶

Voltage	Frequency	Current
110 VAC ±10%	47 to 400 Hz	2.6 Amps
230 VAC ±10%	47 to 400 Hz	1.3 Amps

Physical Dimensions¶

Length: 54.1 cm
Width: 43.2 cm
Height: 24.1 cm
Weight: 14.5 kg

Environment Operating Range¶

Temperature: 5° to 40° C
Humidity: 10% to 90% (non-condensing)

Documentation¶

Document	Number
OpenLAN Product Family	ND-813037
OpenLAN Network Management & Operation Guide	ND-830124
OpenLAN Network Control Server Inst.& Op.	ND-830123
OpenLAN TIU Terminal User Guide	ND-860351
OpenLAN Network Supervisor Guide	ND-830107
OpenLAN TIU Quick Reference Guide	ND-860359
OpenLAN TIU Getting Started Guide	ND-860353

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Contact Information¶

Corporate Headquarters¶

Tel: 47-2-626000

Norway¶

Tel: 47-2-628000

Sweden¶

Tel: 46-760-98400

Denmark¶

Tel: 45-2-685055

Finland¶

Tel: 358-0-368811

United Kingdom¶

Tel: 44-635-35544

West Germany¶

Tel: 49-6172-4080

Belgium¶

Tel: 32-2-7251560

France¶

Tel: 33-1-45371200

Ireland¶

Tel: 353-1-472744

Luxembourg¶

Tel: 352-49618/9

The Netherlands¶

Tel: 31-3402-72411

Spain¶

Tel: 34-3-2152287

Switzerland¶

Tel: 41-21-250122

Hong Kong¶

Tel: 852-5-411912/412053

USA¶

Tel: 1-617-966-4662

Iceland¶

Tel: 354-1-673711

India¶

Tel: 9144-419217/419126

Pakistan¶

Tel: 92-51-851446

Thailand¶

Tel: 66-2-253-9682/4

ND Comtec Headquarters¶

Tel: 47-2-626000

ND Comtec Austria¶

Tel: 43-2266-5353

ND Comtec USA¶

Tel: 1-316-636-5000

Information in this document is subject to change without notice and does not represent a commitment on the part of Norsk Data.