Classical IP: IP over ATM architecture for ATM networks

The paper propose a standards based IP over ATM architectural model for ATM network(s). This model could coexist with the currently implemented proprietary architecture(s), but could also replace them without any major loss in functionality. This architecture allows a convenient migration path to the standards currently under development, like NHRP (Next Hop Resolution Protocol) and IRA (Integrated Routing and Addressing) that provide a far better functionality than any proprietary solution. The Classical IP model uses the standards presented in RFC 1577, UNI 3.x, and IISP (P-NNI phase 0) to implement logical IP subnet (LISs) across the ATM LAN(s) and do IP and ATM level routing between the LISs, facilitating standards based communication over ATM networks. Several options exist in the division/unification of ATM networks(s) into LIS(s). The paper discusses the advantages and disadvantages associated with each available option, along with the associated implementation/management complexities and provides appropriate recommendations based on architecture salability, network reliability, and flexibility for future experimentation.