Network Policy Languages: A Survey and A New Approach
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A survey of current network policy languages is presented. Next, a summary of the techniques for detecting policy conflicts is given. Finally, a new language, path-based policy language, which offers improvements to these is introduced. Previous network policy languages vary from the very specific, using packet filters at the bit level, to the more abstract where concepts are represented, with implementation details left up to individual network devices. As background information a policy framework model and policy-based routing protocols are discussed. The PPL's path-based approach for representing network policies is advantageous in that quality of service and security policies can be associated with an explicit path through the network. This assignment of policies to network flows aids in new initiatives such as integrated services. The more stringent requirement of supporting path-based policies can easily be relaxed with the use of wild card characters to also support differentiated services and best-effort service, which is provided by the Internet today.
IEEE Network, vol 15, no 1, pp. 10-21, January 2001.The article of record as published may be found at http://dx.doi.org/10.1109/65.898818
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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Stone, Gary N. (Monterey, California. Naval Postgraduate School, 2000-09);Network policies are "traffic regulations" for the networks which make up the Internet. These are necessary for managing the flow of data, for access control to the network, and for managing the network to achieve other ...