tailieunhanh - RADIUS Accounting Modifications for Tunnel Protocol Support

The paper proceeds as follows. First, we demonstrate the public policy demand for standardized units of ecosystem measurement. Second, we advance and defend an economic definition of units of account. Third, we contrast this definition with existing definitions of services and environmental accounting units. Fourth, we concretely illustrate our definition via an inventory of measurable ecosystem services. Clear units of account are fundamental to two policy initiatives whose social desirability we take as self-evident: the effective procurement of environmental quality by governments and clear national measures of well-being arising from environmental public goods and market goods—otherwise known as a. | Network Working Group Request for Comments 2867 Category Informational Updates 2866 G. Zorn Cisco Systems Inc. B. Aboba Microsoft Corporation D. Mitton Nortel Networks June 2000 RADIUS Accounting Modifications for Tunnel Protocol Support Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright C The Internet Society 2000 . All Rights Reserved. Abstract This document defines new RADIUS accounting Attributes and new values for the existing Acct-Status-Type Attribute 1 designed to support the provision of compulsory tunneling in dial-up networks. Specification of Requirements In this document the key words MAY MUST MUST NOT optional recommended SHOULD and SHOULD NOT are to be interpreted as described in 2 . 1. Introduction Many applications of tunneling protocols such as PPTP 5 and L2TP 4 involve dial-up network access. Some such as the provision of secure access to corporate intranets via the Internet are characterized by voluntary tunneling the tunnel is created at the request of the user for a specific purpose. Other applications involve compulsory tunneling the tunnel is created without any action from the user and without allowing the user any choice in the matter as a service of the Internet service provider ISP . Typically ISPs providing a service want to collect data regarding that service for billing network planning etc. One way to collect usage data in dial-up networks is by means of RADIUS Accounting 1 . The use of RADIUS Accounting allows dial-up usage data to be collected at a central location rather than stored on each NAS. Zorn et al. Informational Page 1 RFC 2867 RADIUS Tunnel Accounting Support June 2000 In order to collect usage data regarding tunneling new RADIUS attributes are needed this document defines these attributes. In addition several new values for the Acct-Status-Type attribute are proposed. .