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Printable Version: RFC2975.PDF
RFC 2975 Introduction to Accounting Management October 2000 For usage sensitive billing, as well as cost allocation and auditing applications, the reliability requirement are greater. Here transport layer reliability is required to provide robustness against packet loss, as well as application layer acknowledgments to provide robustness against accounting server failures. SNMP operations with the exception of InforRequest provide application layer acknowledgments, and the TCP transport mapping proposed by NMRG provides robustness against packet loss. Inter-domain operation can benefit from data object security (which no existing protocol provides) as well as inter-domain security model enhancements (such as the KSM). Where high-value sessions are involved, such as in roaming, Mobile IP, or telephony, it may be necessary to put bounds on processing delay. This implies the need to reduce latency. As a result, the NMRG extensions are required in time sensitive billing applications, including TCP transport mapping, get-subtree capabilities and OID compression. High reliability is also required in this application, implying the need for application layer as well as transport layer acknowledgments. SNMPv3 with the NMRG extensions and security scalability improvements such as the KSM can satisfy the requirements in intra-domain use. However, in inter-domain use, additional security precautions such as data object security and receipt support are required. No existing protocol can meet these requirements. A summary is given in the table on the next page. Aboba, et al. Informational [Page 46]