Cabletron Systems NB25 E, NB20E user manual Using the Forward Broadcast Switch

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TESTING AND LANVIEW

ON LINE LED

When this green LED is lit, the bridge is on line and operational. The unit has completed a self diagnostics test and is capable of forwarding packets.

STAND BY LED

When this yellow LED is lit, the bridge is in the “Stand by” mode and not capable of forwarding packets.

NOTE: There are separate XMT, RCV, CP, and POK LEDs for each port on the NB20E and NB25E.

TRANSMIT (XMT) LED

When this green LED is flashing, the bridge is transmitting packets to that network segment.

RECEIVE (RCV) LED

When this yellow LED is flashing, bridge is receiving a data packet from that segment.

COLLISION PRESENT (CP) LED

When this red LED is flashing, a collision is occurring on that segment.

PORT OK (POK) LED

This green LED is lit to indicate that the transceiver is connected, and that the port has passed an internal Loop Back Test and is ready for transmission.

4.3USING THE FORWARD BROADCAST SWITCH

The Forward Broadcast switch, Figure 4-1, allows the user to select whether the bridge will forward broadcast messages from one network segment to the other. When the switch is in the On () position, the bridge will allow broadcast messages to pass.

4-3

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Contents TWO Port Ethernet Bridges USER’S Manual Page Page FCC Notice Contents Contents Chapter Introduction Using this ManualNB20E and NB25E TWO Port Ethernet Bridge Getting HelpProvides an illustration of the filtering process Bridge Filtering MethodBridging Method Root Bridge Multiple Bridge EnvironmentsMultiple Bridging Environments Primary and Redundant Data PathsRemote Lanview Related Manuals Network Requirements Chapter Installation Requirements SpecificationsLocation Requirements General Operating SpecificationsNB20E NB25E PerformanceFront Panel Switches Front Panel IndicatorsRS232 Port AUI Port NB20E/NB25EEnvironmental Requirements Power Supply RequirementsPhysical Properties SafetyService Unpacking the NB20E or NB25E Bridge Chapter Installing the NB20E or NB25E BridgeInstalling the Bridge Rack Mount Brackets Installation Installing the Rack Mount BracketsConnecting The Bridge To The Network Cable Support InstallationInstallation Setting The Mode SwitchesNB-25E Connecting The NB20E or NB25E To The Power SourceInstalling the NB20E or NB25E Bridge Installation CHECK-OUT Chapter Testing and LanviewCheck Out Configuration Using LanviewUsing the Forward Broadcast Switch Using the Root Switch

NB25 E, NB20E specifications

Cabletron Systems, renowned for its innovative networking solutions in the late 20th century, introduced the NB20E and NB25E series, which made a significant impact in the realm of network management and reliability. These devices were tailored for businesses seeking to enhance their network infrastructure with efficiency and reliability.

The NB20E is known for its robust performance in medium-sized network environments. It operates with an architecture that allows for seamless integration into existing networks, providing essential features that cater to both versatility and scalability. One of its standout functionalities is the support for multiple protocols, enabling organizations to harness various networking standards without the need for extensive alterations to their current setups.

On the other hand, the NB25E extends these capabilities further, offering enhanced throughput and a more comprehensive range of networking options. This makes it particularly suitable for larger businesses with growing networking demands. The utilization of advanced technologies, such as its embedded intelligence, ensures that the NB25E can efficiently manage and direct network traffic, thus minimizing latency and maintaining optimal performance even during peak usage times.

Both models provide essential characteristics such as a modular design, allowing for easy upgrades and maintenance. This modularity not only prolongs the lifespan of the devices but also provides flexibility for future expansions or modifications as business needs evolve. The systems support various interfaces, catering to diverse environments and ensuring easy connectivity to other networking equipment.

Security is a paramount concern in today’s interconnected world, and Cabletron Systems addressed this in the NB20E and NB25E series. The devices are equipped with advanced security features that protect against unauthorized access and ensure data integrity, providing peace of mind for organizations relying on critical data transmissions.

In addition to their technical advantages, both models offer user-friendly management software, making monitoring and control straightforward even for those with limited networking expertise. This ease of use ensures that companies can leverage their investment fully without requiring extensive training or resources.

In summary, the Cabletron Systems NB20E and NB25E series represent a significant leap in networking technology during their era. With advanced features, modular capabilities, and a commitment to security, these devices remain a noteworthy consideration for businesses looking to enhance their networks and prepare for future growth.
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