182.Configured for normal sequence numbering, received SABME

Severity: 4

Meaning: The Port record is configured for a maximum frame sequence number (Outstanding Frames) of 7 or fewer, but a command was received setting the mode to allow up to 127.

Action: None.

197.Received FRMR, WXYZ="n", control field="n", V(s)="n", V(r)="n", CMD/RSP="n"

Severity:

2

Meaning:

The RLP HDLC frame processor task received a frame reject

 

(FRMR) response to a previously transmitted frame.

Action:

The system recovers automatically from this error; however, if the

 

message is repeated, it may mean that you have a bad communica-

 

tions line.

198.SABM/DISC with wrong link address

Severity:

4

Meaning:

The HDLC frame processor task for the port has received an

 

improperly addressed frame from the subscriber. This situation

 

usually occurs when the port and subscriber devices are both con-

 

figured as logical DCEs or logical DTEs.

Action:

Modify the Port record so that one end of the connection is a logical

 

DCE and the other is a logical DTE.

219.Illegal TC/Gen Clk Combination

Severity:

1

Meaning:

The software has determined that a port is set to run at an illegal line

 

speed (throughput class).

Action:

This is probably a configuration error. Check the Port record and

 

change the throughput class, if necessary.

250.Excessively noisy line

Severity: 3

Meaning: Self-explanatory.

Action:

Check the communications line and cables.

304.RLP Buf Usage exceeded T:“n” C:“n”

Severity: 4

Meaning: The RLP statistic Percentage of Buffers in Use has exceeded the threshold (T:“n” ) that was set by the user. (C:“n” is the current value.)

Action:

If this happens frequently, you may need to reroute some traffic.

System Events

22-5

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Cabletron Systems 1800 manual Figured as logical DCEs or logical DTEs
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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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