NB-30 Bridging

Bridge State on Interface

This color-coded text box indicates the state of bridging over the port interface. Note that this state (and its corresponding color code) will also be reßected on the NB-20E/25E Port display in the Chassis View window. Possible bridge states and their corresponding colors are:

FWD (Forwarding)

(Green) The port is on-line and forwarding packets

 

across the NB-20E/25E from one network segment to

 

another.

DIS (Disabled)

(Blue) Bridging at the port has been disabled by

 

management; no trafÞc can be received or forwarded on

 

this port, including conÞguration information for the

 

bridged topology.

LRN (Learning)

(Magenta) The Forwarding database is being created, or

 

the Spanning Tree Algorithm is being executed because

 

of a network topology change. The port is monitoring

 

network trafÞc, and learning network addresses.

LIS (Listening)

(Magenta) The port is not adding information to the

 

Þltering database. It is monitoring Bridge Protocol Data

 

Unit (BPDU) trafÞc while preparing to move to the

 

forwarding state.

BLK (Blocking)

(Orange) The port is on-line, but Þltering trafÞc from

 

going across the NB-20E/25E from one network segment

 

to another. Bridge topology information will be

 

forwarded by the port.

BRK (Broken)

(Red) The physical interface has malfunctioned.

The port Status is taken from CabletronÕs proprietary Bridge MIB, as the NB-30 is an older bridge. Potential status conditions are:

OFF

The port is off, due to a failed network interface chip

 

associated with that port.

OK/SQE ON

The port is communicating with the network and the

 

transceiver making the connection to the network has

 

SQE enabled.

OK/SQE OFF

The port is communicating with the network and the

 

transceiver making the connection to the network has

 

SQE disabled.

CARRIER LOST

Communication with the network has not been

 

established or has been lost

Bridge Status

3-5

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Cabletron Systems NB30 manual Bridge State on Interface, OK/SQE on

NB30 specifications

Cabletron Systems NB30 is a noteworthy networking device that emerged in the mid-1990s as a critical component for businesses looking to enhance their local area network (LAN) capabilities. Designed primarily for the burgeoning demand of network speed and reliability, the NB30 served as a bridge in networking technology, offering organizations a robust solution to keep up with the advancing digital landscape.

One of the main features of the Cabletron NB30 is its ability to support both Ethernet and Token Ring protocols. This dual compatibility made it an attractive choice for enterprises that were transitioning from older networking systems to newer infrastructures. By accommodating both technologies, the NB30 enabled smoother migrations without necessitating a complete overhaul of existing networking components.

Another significant characteristic of the NB30 is its modular architecture. This design allowed organizations to customize their networking setup according to specific needs and preferences. Users could add or replace modules to enhance functionality, from extra ports to support additional devices or advanced features like network management tools, ensuring that their systems could grow and evolve in tandem with their business requirements.

The NB30 also utilized a stackable design, which facilitated scalability. Organizations could easily connect multiple NB30 units to increase their network capacity and performance. This stacking capability was a significant advantage as it allowed for efficient use of space and resources while providing a path for future growth.

In terms of performance, the Cabletron NB30 boasted a switching capacity that enabled quick data transfer rates, reducing latency and improving overall network responsiveness. This speed was crucial during a period when businesses were increasingly reliant on real-time data exchange and communication.

Additionally, the NB30 incorporated advanced network management features, enabling administrators to monitor traffic, diagnose issues, and implement changes with ease. This level of control was essential for maintaining network health, ensuring that businesses remained operational without unnecessary downtimes.

Overall, Cabletron Systems NB30 played a pivotal role in the evolution of networking technology. Its combination of protocol flexibility, modular design, scalability, and robust performance made it a popular choice for businesses looking to create efficient, dependable networks in an era of rapid technological advancement. The NB30's legacy continues to influence modern networking solutions, demonstrating the importance of adaptability and performance in the ever-changing digital world.