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IEEE 802.11 Medium Access Control (MAC) Profile for Control and Provisioning of Wireless Access Points (CAPWAP) (RFC7494) Disclosure Number: IPCOM000241344D
Original Publication Date: 2015-Apr-01
Included in the Prior Art Database: 2015-Apr-18
Document File: 26 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Shao: AUTHOR [+6]


The CAPWAP protocol supports two MAC modes of operation: Split and Local MAC, as described in [RFC5415] and [RFC5416]. However, there are MAC functions that have not been clearly defined. For example, IEEE 802.11 [IEEE.802.11] encryption is specified as located in either the AC or the WTP with no clear way to negotiate where it should be located. Because different vendors have different definitions of the MAC mode, many MAC-layer functions are mapped differently to either the WTP or the AC by different vendors. Therefore, depending upon the vendor, the operators in their deployments have to perform different configurations based on implementation of the two modes by their vendor. If there is no clear specification, then operators will experience interoperability issues with WTPs and ACs from different vendors.

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Internet Engineering Task Force (IETF)                           C. Shao Request for Comments: 7494                                       H. Deng Category: Standards Track                                   China Mobile ISSN: 2070-1721                                            R. Pazhyannur                                                            Cisco Systems                                                                  F. Bari                                                                     AT&T                                                                 R. Zhang                                                            China Telecom                                                            S. Matsushima                                                         SoftBank Telecom                                                               April 2015

     IEEE 802.11 Medium Access Control (MAC) Profile for Control and             Provisioning of Wireless Access Points (CAPWAP)


   The Control and Provisioning of Wireless Access Points (CAPWAP)    protocol binding for IEEE 802.11 defines two Medium Access Control    (MAC) modes for IEEE 802.11 Wireless Transmission Points (WTPs):    Split and Local MAC.  In the Split MAC mode, the partitioning of    encryption/decryption functions is not clearly defined.  In the Split    MAC mode description, IEEE 802.11 encryption is specified as located    in either the Access Controller (AC) or the WTP, with no clear way    for the AC to inform the WTP of where the encryption functionality    should be located.  This leads to interoperability issues, especially    when the AC and WTP come from different vendors.  To prevent    interoperability issues, this specification defines an IEEE 802.11    MAC Profile message element in which each profile specifies an    unambiguous division of encryption functionality between the WTP and    AC.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Inter...