Maxdata

must correspond to the PIU size configured on the host (parameter MAXDATA of macro PU in VTAM). For a link between a PU type 4 and a PU type 2, the frame size configured for the TPAD port must be set at the value of MAXDATA in VTAM plus 6 bytes (corresponding to the length of the link header and the link trailer).

Autocall

causes automatic calling between SNA ports when the controller (identified by Link Address) becomes active. If set to Y on an SNA port, an X.25 call will be made from the local port to the remote subscriber port.

Autocall Retry Time

is the time between autocall retries.

Autocall Retry Count

is the maximum number of times an autocall will be sent. Note that a value of 0 allows indefinite retries.

Istatus

affects the line and PU the same way Blocked Port Flag affects the port. If configured as Inactive, the PU will be disabled until either an on-line enable is performed (see page 19-15) or a VARY ACT (see page D-4) is sent from a NetView manager device.

LPDA Resource ID

identifies a logical unit (LU) on the PU. LPDA requires both a PU name and an LU ID. The Resource ID value must match the NetView LOCADDR.

LLC2 Connection

specifies whether SDLC-LLC2 conversion will be done on the PU connection, either locally or at a remote node via an X.25 logical or physical port.

If SDLC-LLC2 conversion will be done, LLC2 Connection must be configured as Y; otherwise, the PU will not re-activate properly after the session unless an on-line update ([F7] ) is per- formed in the logical port record.

L2DatMode

determines whether transmission can be in one (alternate) or two (simultaneous) direc- tions at the same time.

LLC2 Parameters

Local SAP Address

is the remote service access point (SAP) address used to connect the PU to the host. This parameter is relevant only in a connection to a 3174 or AS/400-type setup where a specific source SAP address is required. If the LLC2 session will be run over a native LLC2 frame relay interface, the parameter will be ignored.

Local MAC Address

identifies the PU to the host. Like the local SAP address, this parameter is relevant only in a connection to a 3174 or AS/400-type setup where a specific source MAC address is required. If the LLC2 session will be run over a native LLC2 frame relay interface, the parameter will be ignored.

Configuring SNA

9-11

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Cabletron Systems 1800 manual LLC2 Parameters
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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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