Chapter 4: Troubleshooting

Table 4-1 LANVIEW LEDs

LED

Color

Description

Error Condition/

Recommended Action

 

 

 

 

 

 

 

 

 

 

 

PWR

Green

Indicates that the

If OFF, check the input power

 

 

NBR is receiving

source (circuit breaker, fuse,

 

 

power.

etc.).

 

 

 

 

CPU

Multi-

Flashing Green,

If OFF, Red, or Yellow the

 

Color

indicates that the

board has a problem.

 

 

NBR is operating

 

 

Green

properly.

Press the RESET button on

 

 

 

the NBR front panel to

 

Yellow

 

re-initialize the board. If the

 

 

 

board does not re-initialize,

 

Red

 

it has probably failed. Call

 

 

 

Cabletron Systems Technical

 

 

 

Support.

 

 

 

 

RECEIVE

Yellow

Light flashes to

If none of the receive LEDs

A, B, C, D

 

indicate that a

are flashing, the NBR is not

 

 

segment is

receiving frames on any of

 

 

receiving a frame.

the segments.

 

 

 

Ensure that all connected

 

 

 

ports are enabled.

 

 

 

 

TRANSMIT

Green

Light flashes to

If none of the transmit LEDs

A, B, C, D

 

indicate that a

are flashing, the NBR is not

 

 

segment is

transmitting frames on any of

 

 

transmitting a

the segments.

 

 

frame.

 

 

 

If not connected to

Contact Cabletron Systems

 

 

the LAN, the LED

Technical Support for

 

 

flashes every two

assistance.

 

 

seconds to indicate

 

 

 

it is transmitting

 

 

 

BPDU frames.

 

 

 

 

 

Page 4-2

NBR-SERIES Installation Guide

Page 43
Image 43
Cabletron Systems NBR-220, NBR-420, NBR-620 manual Troubleshooting

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.