Abstract

This Tolly Group certification report documents the successful IBM LAN Network Manager (LLM) Controlled Access Unit certification of the Olicom Controlled Access Module OC-3671 01.01A 01.01 0101NA. Published in September 1994, the report verifies that the product interoperated with IBM’s LAN Network Manager version 1.1 and satisfied the compatibility requirements for use in IBM token-ring network management environments. Olicom USA commissioned The Tolly Group in June 1994 to validate the module against IBM’s LNM protocol, and the product passed the certification program, receiving official LNM certification on June 24, 1994. 

The evaluation was designed to verify both functional compatibility and management behavior within IBM’s proprietary Controlled Access Unit architecture. As shown in the test matrices on pages 2 and 3, the certification covered a broad range of management and control operations. These included CAU discovery and reset, graphical representation of the CAU and attached lobe attachment modules (LAMs), CAU and LAM profile reporting, wrap-state changes, LAM enable and disable functions, individual port enable and disable testing, microcode update procedures, registration and deregistration with LAN Network Manager, and adapter removal handling. The test suite also validated access-control behavior for unauthorized or moved adapters, wrap-status reporting for RI, RO, RI/RO, and normal states, RI/RO wrap recovery, and beacon isolation fault handling. 

According to the methodology on page 3, testing used two token-ring workstations: one running IBM LAN Network Manager and one acting as a target station. The CAU under test was connected to an LNM station running LAN Network Manager version 1.1 PTF UR40085. A Network General Sniffer captured frame activity during management operations, and an IBM 8228 MAU provided Ring In/Ring Out functions. The test-bed diagram on page 4 illustrates this configuration. 

Overall, the report shows that the Olicom OC-3671 delivered the interoperability, management visibility, and fault-handling behavior required for deployment in IBM-managed token-ring infrastructures.