Chapter 2: Controls and Indicators

2.1 LANVIEW LEDs

The NBR-220, NBR-420, and NBR-620 incorporate the Cabletron Systems LANVIEW status monitoring and diagnostics system. LANVIEW LEDs help diagnose problems, such as a power failure or a cable fault. Each NBR includes the following LANVIEW LEDs:

A CPU LED, for board status

RECEIVE, TRANSMIT, COLLISION, and STAND BY LEDs for each Ethernet port

A PWR LED for power status

2.2 RESET BUTTON

The front panel also has a RESET button that allows you to re-initialize the processor. Chapter 4, Troubleshooting, provides detailed descriptions of each NBR LANVIEW LED.

2.3 LCD DISPLAY

The NBR-420 and NBR-620 are equipped with an LCD Display located on the front panel. The LCD provides status information about the present as well as past condition of the hub. You can view power up diagnostics, firmware revisions, MAC addresses, IP addresses, and alarm messages. The LCD displays the most current event, but can store up to 25 past events in memory. To access stored messages, press the DISPLAY button located on front panel of the NBR. Refer to Chapter 4, Troubleshooting, for detailed information.

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NBR-SERIES Installation Guide

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Cabletron Systems NBR-620, NBR-420, NBR-220 manual Lanview LEDs, Reset Button, LCD Display

NBR-620, NBR-220, NBR-420 specifications

Cabletron Systems, a well-known name in the networking field, has designed a range of network interface devices including the NBR-620, NBR-220, and NBR-420 models. These devices have become essential components for businesses looking to enhance their network performance and reliability.

The NBR-620, for instance, is a high-performance network bridge/router that specializes in managing network traffic efficiently. It offers a robust set of features such as multiple Ethernet ports, which can support various data rates, including 10/100/1000 Mbps, making it ideal for both small and large enterprises. The NBR-620 supports advanced routing protocols like OSPF and RIP, which optimize data path selection and ensure effective communication across different network segments. Moreover, its built-in firewall capabilities provide an additional layer of security, safeguarding sensitive data from potential threats and unauthorized access.

The NBR-220, on the other hand, is designed for cost-effective solutions without compromising on essential functionalities. This device supports simple plug-and-play installation, making it user-friendly for organizations that may not have an extensive IT infrastructure. The NBR-220 includes features such as VLAN support, allowing for network segmentation and increased security. Its scalability means that it can grow alongside an organization's needs, accommodating future expansions efficiently. The device's ability to support multiple network topologies ensures versatility in deployment, catering to various business requirements.

Finally, the NBR-420 is a versatile networking solution that combines the best elements of the previous models but with enhanced features suitable for demanding enterprise environments. It includes advanced quality of service (QoS) capabilities, ensuring that critical applications receive the bandwidth they require for optimal performance. With support for IPv6, the NBR-420 prepares businesses for the future of networking as the world transitions more towards this next-generation internet protocol. Additionally, its built-in diagnostics tools facilitate easy monitoring and management of network performance.

In summary, Cabletron Systems' NBR-620, NBR-220, and NBR-420 offer diverse solutions tailored for modern networking needs. Each model encompasses unique features and technologies that cater to various business sizes and requirements, focusing on performance, scalability, and security. As businesses continue to evolve in a digital-first world, these devices play a crucial role in facilitating seamless network operations.