Communications Controller for Linux Modernization Guide

Communications Controller for Linux emulated an ACF/NCP environment, allowing SNA network operation on z/Linux. It handled tasks like link management, routing, and session control.

Common operations included defining network resources (lines, PU/LUs), configuring routing paths, starting/stopping the controller, and monitoring network activity. Configuration files defined the network topology and resource parameters.

Configuration was primarily file-based, using configuration files to define network resources and parameters. Command-line interfaces were used for starting, stopping, and monitoring the controller.

The system comprised components such as the NCP emulator, link layer drivers, and session management modules. These components communicated through internal APIs and shared memory.

The product likely did not expose external APIs like REST or SOAP. Integration would have been achieved through configuration and monitoring tools, or potentially through custom scripting interacting with the command-line interface.

The product used SNA protocols for network communication. Specific protocols included SDLC, QLLC, and possibly TCP/IP encapsulation for certain configurations.

The product enabled organizations to extend the life of their SNA networks by providing a z/Linux-based emulation environment. This allowed continued use of existing applications and infrastructure without immediate replacement.

By emulating the communications controller on z/Linux, organizations could consolidate hardware and reduce operational costs associated with dedicated FEPs. This also provided flexibility in deployment and management.

Authentication methods likely included basic username/password authentication for administrative access. Integration with external authentication systems like LDAP or Kerberos might have been possible.

The access control model was likely role-based (RBAC), with different roles having varying levels of access to configuration and monitoring functions. Access control lists (ACLs) might have been used for finer-grained control.

Encryption was likely used for sensitive data transmission over the network. This could include SSL/TLS for administrative interfaces and encryption of SNA traffic using protocols like IPSec.

The product provided audit logging capabilities, recording administrative actions, security events, and network activity. These logs could be used for security monitoring and compliance purposes.

Administrative interfaces likely included a command-line interface (CLI) for configuration and monitoring. A web-based GUI might have been available for easier management.

User management involved creating and managing user accounts with specific roles and permissions. This could be done through the CLI or a web-based interface.

Monitoring capabilities included real-time monitoring of network activity, resource utilization, and system health. Logging capabilities captured events for troubleshooting and analysis.