Control And Provisioning of Wireless Access Points (capwap) ----------------------------------------------------------- Charter Last Modified: 2008-04-22 Current Status: Active Working Group Chair(s): Mahalingam Mani Dorothy Gellert Margaret Wasserman Operations and Management Area Director(s): Dan Romascanu Ronald Bonica Operations and Management Area Advisor: Dan Romascanu Technical Advisor(s): David Borman Scott Kelly Bob O'Hara Charles Clancy Mailing Lists: General Discussion:capwap@frascone.com To Subscribe: http://lists.frascone.com/mailman/listinfo/capwap Archive: http://lists.frascone.com/pipermail/capwap Description of Working Group: The original CAPWAP WG charter included drafting a problem statement and a taxonomy of architectures. The new charter of the CAPWAP WG proposes building upon the original charter and developing a CAPWAP protocol to provide interoperability among WLAN backend architectures. The intent of the CAPWAP protocol is to facilitate control, management and provisioning of WLAN Termination Points (WTPs) specifying the services, functions and resources relating to 802.11 WLAN Termination Points in order to allow for interoperable implementations of WTPs and ACs. The revised CAPWAP WG will reference two classes of the Centralized WLAN Architecture family, namely the Local MAC and the Split MAC, as described in the CAPWAP Architecture Taxonomy draft. The protocol will define the CAPWAP control plane including the primitives to control data access. An effective Centralized CAPWAP Architecture impacts how WLAN data traffic is managed over the backend network. This implies the abilitiy to control how data is forwarded by negotiating existng data encapsulation mechanisms and specifying data payload formats in order to ensure interoperability between CAPWAP vendors. No other specifications of the CAPWAP data plane are within the scope of this charter. The CAPWAP WG will strive for extensibility in the protocol design to favor future applicability to other access technologies, especially IEEE 802.16. While accommodation of any access technology other than IEEE 802.11 is not required for successful completion, there are clear deployment advantages if a wide range of access technologies are accommodated. In summary, the primary goals of the group will be: 1. Defining a set of Objectives based on the architecture taxonomy work that lists the requirements for an interoperable CAPWAP protocol. In addition, the WG will incorporate requirements derived from the inputs provided by Enterprise and (hotspot) Providers based on the WLAN deployment challenges addressed by CAPWAP architecture. This document will: a. include objectives to address problems described in the CAPWAP Problem statement document b. Describe each objective, its benefit to the protocol and how it satisfies the problem statement. c. Prioritize and classify the objectives into 3 categories: i. Mandatory and Accepted ii. Desirable iii. Rejected d. Undergo review in IEEE 802 as needed This should result in the first WG Last Call for Objectives draft. To avoid requirements bloat and stalemate, the WG has a hard deadline on the Objectives phase. The WG MUST reach WG consensus on the objectives draft by Feb 2005. This is for several reasons: * We must send this for review to IEEE at that time. * We must have a reasonably stable set of objectives so that candidate submissions are aware of the objectives to be met. The 2nd WG Last Call (in April) for the objectives draft is to ensure that the WG has consensus on any changes that may result from IEEE and expert review. So it is not the intention that the WG keeps adding new Objectives after Feb 2005. If the WG cannot reach consensus on the Objectives draft by the May 2005 milestone to the IESG, the WG will close. 2. Evaluating a set of candidate proposals that include existing IETF protocols and any proposals leading to the selection of a protocol on which to base the CAPWAP standard. 3. Developing a CAPWAP protocol standard that meets the Mandatory and Accepted objectives from the Evaluation draft and contains the minimal set of feature needed to control and provision WLAN Access Points. Specifically The CAPWAP protocol document will address the following considerations: a. Architecture b. Operations c. Security d. Network Management e. Scalability f. Performance 4. A MIB Document to support the CAPWAP protocol. In addition, the CAPWAP WG will maintain its Liaison with the IEEE to ensure consistency of its work with the IEEE 802.11 Standard. Deliverables: * Objectives/Criteria Document for CAPWAP protocol * Protocol evaluation and base protocol selection document * CAPWAP Protocol standard * MIB support standard Goals and Milestones: Done Last call for problem statement draft. Done Discuss last call comments for problem statement at IETF 59. Done Last Call for architecture description document. Done Submit problem statement to IESG for publication approval. Done Architecture document to expert review. Done Stable Architecture document for review/sync-up with IEEE 802 Done Discuss results of IEEE 802 review/sync-up Done Issue first Internet-Draft of CAPWAP Objectives document Done Submit CAPWAP Objectives to IEEE/IETF experts review Done First WGLC for CAPWAP Objectives Draft Done Deadline to submit candidate protocol proposals to the WG Done Second WGLC for CAPWAP Objectives Draft Done Issue first Internet-Draft of CAPWAP Evaluation draft Done Submit CAPWAP Evaluation draft to IESG as Information RFC Done Submit CAPWAP Objectives draft to IESG as Informational RFC Done Issue first Internet Draft of CAPWAP protocol Done Issue first CAPWAP protocol 802.11bindings Jan 2007 Issue first Internet-Draft of 802.11 Binding MIB Jan 2007 Issue first Internet-Draft of CAPWAP Base MIB Feb 2007 First WGLC for CAPWAP Base Protocol Feb 2007 First WGLC for 802.11 Binding Mar 2007 CAPWAP Specs to IEEE 802.11 for Review Apr 2007 WGLC for CAPWAP Base MIB Apr 2007 WGLC for CAPWAP 802.11 Binding MIB May 2007 Receive results of IEEE 802.11 Review May 2007 Final WGLC for CAPWAP Base Protocol May 2007 Final WGLC for 802.11 Binding Jul 2007 CAPWAP Base Protocol to IESG Jul 2007 CAPWAP 802.11 Binding to IESG Sep 2007 CAPWAP Base MIB to the IESG Sep 2007 CAPWAP 802.11 Binding MIB to IESG Internet-Drafts: Posted Revised I-D Title ------ ------- -------------------------------------------- Mar 2006 Mar 2008 CAPWAP Protocol Specification Oct 2006 Feb 2008 CAPWAP Protocol Binding for IEEE 802.11 Feb 2007 Oct 2007 CAPWAP Threat Analysis for IEEE 802.11 Deployments Jul 2007 Mar 2008 CAPWAP Access Controller DHCP Option Request For Comments: RFC Stat Published Title ------- -- ----------- ------------------------------------ RFC3990 I Feb 2005 CAPWAP Problem Statement RFC4118 I Jul 2005 Architecture Taxonomy for Control and Provisioning of Wireless Access Points(CAPWAP) RFC4565 I Jul 2006 Evaluation of Candidate Control and Provisioning of Wireless Access Points (CAPWAP) Protocols RFC4564 I Jul 2006 Objectives for Control and Provisioning of Wireless Access Points (CAPWAP)