Integrated Services (intserv) ----------------------------- Charter Last Modified: 12/20/2000 Current Status: Concluded Working Group Chair(s): John Wroclawski Transport Area Director(s): Scott Bradner Allison Mankin Transport Area Advisor: Allison Mankin Mailing Lists: General Discussion:int-serv@isi.edu To Subscribe: int-serv-request@isi.edu Archive: ftp://ftp.isi.edu/int-serv/int-serv.mail Description of Working Group: Recent experiments demonstrate the capability of packet switching protocols to support Integrated Services --- the transport of audio, video, real-time, and classical data traffic within a single network infrastructure. These experiments suggest that expanding the Internet service model would better meet the needs of these diverse applications. The purpose of this working group is to specify this enhanced service model and then to define and standardize certain interfaces and requirements necessary to implement the new service model. The working group will focus on defining a minimal set of global requirements which transition the Internet into a robust integrated-service communications infrastructure. Enhancements to individual protocols (e.g., adding additional routing information to routing protocols, or choosing IP queueing disciplines for routers) will be left to other working groups, except in those rare cases where detailed definitions of behavior are critical to the success of the enhanced architecture. Extending the Internet service model raises a series of questions. The working group will focus on the three problems listed below: (1) Clearly defining the services to be provided. The first task faced by this working group is to define and document the enhanced Internet service model. (2) Defining the application service, router scheduling and (general) subnet interfaces. The working group must define at least three high-level interfaces: that expressing the application's end-to-end requirements, that defining what information is made available to individual routers within the network, and the additional expectations (if any) the enhanced service model has for subnet technologies. The working group will define these abstract interfaces, and will coordinate with and advise IP over "subnet" working groups (such as IP over ATM) in this. (3) Developing router validation requirements which can ensure that the proper service is provided. We assume that the Internet will continue to contain a heterogeneous set of routers, running different routing protocols and using different forwarding algorithms. The working group will seek to define a minimal set of additional router requirements which ensure that the Internet can support the new service model. Rather than presenting specific scheduling and admission control algorithms which must be supported, these requirements will likely take the form of behavioral tests which measure the capabilities of routers in the integrated services environment. This approach is used because no single algorithm seems likely to be appropriate in all circumstances at This time. The working group will coordinate with the Benchmarking Working Group (BMWG). We expect to generate three RFCs as a product of performing these tasks. An important aspect of this working group's charter is in coordination with the development of IP Next Generation. The working group will be reviewed in November 1995 to determine if it should be re-chartered as is or modified to reflect IPng developments, in particular, but also operational and commercial developments. The IESG deems the great significance of this working group to merit this unusual review. In addition, because many of the integrated services concepts are new, the working group may produce Informational RFCs explaining specific algorithms that may be appropriate in certain circumstances, and may host some educational meetings to assist both IETF members and members of the larger Internet community to understand the proposed enhancements to IP. The working group proposes to hold regular meetings beyond those held at the IETF meetings. Goals and Milestones: Done Seattle IETF: First full meeting of working group. Discuss proposed service model. Discuss strategy for addressing other issues. Done Submit Informational RFC on service model. Discuss initial draft documents describing router requirements and strategies for behavioral testing. Hold coordination meeting with RSVP Working Group (and perhaps others as well) to discuss Application (end-to-end) PI. Done Continue discussion of router requirements. Develop experimental verification of behavioural testing approach. Continue discussion of API and subnet models. Done Submit API. Working group charter will be revised after a working group review managed by the area director, then submitted via the normal chartering process for approval. Done Submit router requirements document for publication as an RFC. Done Submit subnet document for publication as an RFC. Done Submit draft on encoding of flow compression information within IntServ Flow Specification for publication as Standards-track RFC Internet-Drafts: No Current Internet-Drafts. Request For Comments: RFC Stat Published Title ------- -- ----------- ------------------------------------ RFC2211 PS OCT 97 Specification of the Controlled-Load Network Element Service RFC2212 PS OCT 97 Specification of Guaranteed Quality of Service RFC2210 PS OCT 97 The Use of RSVP with IETF Integrated Services RFC2213 PS OCT 97 Integrated Services Management Information Base using SMIv2 RFC2216 I OCT 97 Network Element Service Specification Template RFC2214 PS OCT 97 Integrated Services Management Information Base Guaranteed Service Extensions using SMIv2 RFC2215 PS OCT 97 General Characterization Parameters for Integrated Service Network Elements RFC3006 PS DEC 00 Integrated Services in the Presence of Compressible Flows