Chapter 4: Troubleshooting

4.2 TROUBLESHOOTING CHECKLIST

If your NBR is not operating properly, the following checklist describes some of the problems that may occur, possible causes for the problem, and suggestions for resolving the problem.

Table 4-2 Troubleshooting Checklist

Problem

Possible Causes

Recommended

Action

 

 

 

 

 

 

 

 

No LEDs on.

Loss of Power.

Check that the NBR has

 

 

adequate power.

 

NBR not properly

Verify proper

 

installed.

installation, and check

 

 

to see that the PWR

 

 

LED is green.

 

 

 

No Local Management

Terminal setup is not

Refer to your NBR

Password screen.

correct.

Local Management

 

 

Guide for proper setup

 

 

procedures.

 

Improper console cable/

Refer to your NBR

 

UPS cable pinouts.

Local Management

 

 

Guide for proper

 

 

console/ UPS port

 

 

pinouts.

 

 

 

Cannot contact the

Improper Community

Refer to your NBR

NBR from in-band

Names Table.

Local Management

management.

 

Guide for Community

 

NBR does not have an

Names Table setup and

 

IP address.

IP address assignment

 

 

procedures.

 

No link to device.

Check link to device.

 

 

 

Page 4-4

NBR-SERIES Installation Guide

Page 45
Image 45
Cabletron Systems NBR-420, NBR-220, NBR-620 manual Troubleshooting Checklist

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.