Setup Timer, Max Packet Size | Cabletron Systems 1800, FRX4000

X.25 Status and Conﬁguration

Setup Timer

The Setup Timer only has a function if the port you are conÞguring is a dial port; that is, if the port is connected to a dial modem. The setup timer starts when the port enters the linkup state. Use this Þeld to enter a time period (in seconds). If there is no response from the other end before the time period expires, the port will enter the failed state.

Max Packet Size

Use this Þeld to specify the maximum data packet size that will be allowed to pass through this X.25 port. The packet size included in a call setup packet will be used, as long as it is smaller than the maximum speciÞed here. Valid values are 128, 256, 512, 1024, 2048, and 4096.

Default Packet Size

The value entered in this Þeld will be assigned to an incoming call setup packet if the packet does not include a packet size. Valid values are 16, 32, 64, 128, 256, 512, 1024, 2048, and 4096.

Max UnACK Packets/Channel

This speciÞes the maximum number of sequentially numbered frames that can be waiting for acknowledgment by the destination device. If this number is exceeded, no frames will be transmitted until an acknowledgment is received.

Setup Packet Window Size

This speciÞes a default window size that will be assigned to an incoming call setup packet if the packet does not include a window size. Valid values are 1 to 7 packets.

Default Throughput Class

Use this Þeld to specify the value that will be inserted into a Call Request packet if Throughput Class Negotiation is not enabled or if a throughput class is not requested in the Call Request.This value should not be higher than the line speed speciÞed for the physical port.

Enter a number 3 - 13 that corresponds to the following values (in bits per second):

3	= 75	7	= 1200	11	= 19.2K
4	= 150	8	= 2400	12	= 48K
5	= 300	9	= 4800	13	= 64K
6	= 600	10	= 9600

Closed User Group Member

This Þeld speciÞes whether the port belongs to a Closed User Group (CUG). The CUG function is a privacy feature that allows the creation of up to 100 groups of users per port. Members of a CUG can communicate with other members, but access to and from network users outside that CUG may be denied (determined by Rcv Calls Outside CUG and Make Calls Outside CUG).

6-4	Conﬁguring X.25 Physical Ports

1800, FRX4000, FRX6000 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.