Internet Traffic Engineering (tewg) ----------------------------------- Charter Last Modified: 2004-08-16 Current Status: Active Working Group Chair(s): Ed Kern Jim Boyle Sub-IP Area Director(s): Bert Wijnen Alex Zinin Sub-IP Area Advisor: Bert Wijnen Mailing Lists: General Discussion:te-wg@ops.ietf.org To Subscribe: te-wg-request@ops.ietf.org In Body: subscribe Archive: http://ops.ietf.org/lists/te-wg Description of Working Group: Internet Traffic Engineering is defined as that aspect of Internet network engineering concerned with the performance optimization of traffic handling in operational networks, with the main focus of the optimization being minimizing over-utilization of capacity when other capacity is available in the network. Traffic Engineering entails that aspect of network engineering which is concerned with the design, provisioning, and tuning of operational internet networks. It applies business goals, technology and scientific principles to the measurement, modeling, characterization, and control of internet traffic, and the application of such knowledge and techniques to achieve specific service and performance objectives, including the reliable and expeditious movement of traffic through the network, the efficient utilization of network resources, and the planning of network capacity. The Internet Traffic Engineering Working Group defines, develops, specifies, and recommends principles, techniques, and mechanisms for traffic engineering in the internet. The working group also serves as a general forum for discussing improvements to IETF protocols to advance the traffic engineering function. The primary focus of the tewg is the measurement and control aspects of intra-domain internet traffic engineering. This includes provisioning, measurement and control of intra-domain routing, and measurement and control aspects of intra-domain network resource allocation. Techniques already in use or in advanced development for traffic engineering include ATM and Frame Relay overlay models, MPLS based approaches, constraint-based routing, and traffic engineering methodologies in Diffserv environments. The tewg describes and characterizes these and other techniques, documents how they fit together, and identifies scenarios in which they are useful. The working group may also consider the problems of traffic engineering across autonomous systems boundaries. The tewg interacts with the common control and measurement plane working group to abstract and define those parameters, measurements, and controls that traffic engineering needs in order to engineer the network. The tewg also interacts with other groups whose scopes intersect, e.g. mpls, is-is, ospf, diffserv, ippm, rap, rtfm, policy, rmonmib, disman, etc. The work items to be undertaken by TE WG encompass the following categories: - BCP documents on ISP uses, requirements, desires (TEBCPs) - Operational TE MIB (TEMIB) - Document additional measurements needed for TE (TEM) - TE interoperability & implementation informational notes (TEIMP) - Traffic Engineering Applicability Statement (TEAPP) For the time being, it also is covering the area of verification that diffserv is achievable in traffic engineered SP networks. This will entail verification and review of the Diffserv requirements in the the WG Framework document and initial specification of how these requirements can be met through use and potentially expansion of existing protocols. Goals and Milestones: Done Solicit TEBCP drafts concerning requirements, approaches, lessons learned from use (or non use) of TE techniques in operational provider environments. Done Review and comment on operational TEMIB Done TEBCPs submitted for WG comment Done Comments to TEBCP authors for clarifications Done First draft of TEAPP Done First draft of TEM Done TE Framework Draft to AD/IESG for review. Done Drafts available for E-LSP and L-LSP Diffserv TE Done Another update of operational TEMIB draft Done All comments back on TE Diffserv requirements Done Submit revised TEBCPs and REAPP to AD/IESG for review Done Any necessary protocol extensions for Diffserv TE sent to protocol relevant WGs for review Done Progress Diffserv TE E-LSP and L-LSP Diffserv TE drafts together to AD/IESG for review Done Progress operational TE MIB to AD review Done Submit MPLS Inter-AS TE requirements to IESG Internet-Drafts: Posted Revised I-D Title ------ ------- -------------------------------------------- Feb 02 Dec 04 Protocol extensions for support of Differentiated-Service-aware MPLS Traffic Engineering Oct 02 Dec 04 Russian Dolls Bandwidth Constraints Model for Diff-Serv-aware MPLS Traffic Engineering Apr 03 Dec 04 Max Allocation with Reservation Bandwidth Constraint Model for MPLS/DiffServ TE & Performance Comparisons May 03 Sep 04 MPLS Inter-AS Traffic Engineering requirements Jun 03 Dec 04 Maximum Allocation Bandwidth Constraints Model for Diff-Serv-aware MPLS Traffic Engineering Mar 04 Nov 04 Requirements for Inter-area MPLS Traffic Engineering Request For Comments: RFC Stat Published Title ------- -- ----------- ------------------------------------ RFC3272 I May 02 Overview and Principles of Internet Traffic Engineering RFC3346 I Aug 02 Applicability Statement for Traffic Engineering with MPLS RFC3386 I Nov 02 Network Hierarchy and Multilayer Survivability RFC3564 I Jul 03 Requirements for Support of Differentiated Services-aware MPLS Traffic Engineering RFC3785BCP Jun 04 Use of Interior Gateway Protocol Metric as a second MPLS Traffic Engineering Metric RFC3970Standard Jan 05 A Traffic Engineering MIB