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Control And Provisioning of Wireless Access Points (CAPWAP) Access Controller DHCP Option
RFC 5417

Document type: RFC - Proposed Standard (March 2009; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 5417 (Proposed Standard)
Responsible AD: Dan Romascanu
Send notices to: capwap-chairs@ietf.org, draft-ietf-capwap-dhc-ac-option@ietf.org, pcalhoun@cisco.com

Network Working Group                                         P. Calhoun
Request for Comments: 5417                           Cisco Systems, Inc.
Category: Standards Track                                     March 2009

      Control And Provisioning of Wireless Access Points (CAPWAP)
                     Access Controller DHCP Option

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (c) 2009 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents in effect on the date of
   publication of this document (http://trustee.ietf.org/license-info).
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Abstract

   The Control And Provisioning of Wireless Access Points Protocol
   allows a Wireless Termination Point to use DHCP to discover the
   Access Controllers to which it is to connect.  This document
   describes the DHCP options to be used by the CAPWAP Protocol.

Calhoun                     Standards Track                     [Page 1]
RFC 5417                 CAPWAP AC DHCP Option                March 2009

Table of Contents

   1. Introduction ....................................................2
      1.1. Conventions Used in This Document ..........................2
      1.2. Terminology ................................................2
   2. CAPWAP AC DHCPv4 Option .........................................2
   3. CAPWAP AC DHCPv6 Option .........................................3
   4. IANA Considerations .............................................5
   5. Security Considerations .........................................5
   6. Acknowledgments .................................................5
   7. References ......................................................5
      7.1. Normative References .......................................5
      7.2. Informative References .....................................6

1.  Introduction

   The Control And Provisioning of Wireless Access Points Protocol
   (CAPWAP) [RFC5415] allows a Wireless Termination Point (WTP) to use
   DHCP to discover the Access Controllers (AC) to which it is to
   connect.

   Prior to the CAPWAP Discovery process, the WTP may use one of many
   methods to identify the proper AC with which to establish a CAPWAP
   connection.  One of these methods is through the DHCP protocol.  This
   is done through the CAPWAP AC DHCPv4 or CAPWAP AC DHCPv6 Option.

1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

1.2.  Terminology

   This document uses terminology defined in [RFC3753], [RFC2131],
   [RFC3315], and [RFC5415].

2.  CAPWAP AC DHCPv4 Option

   This section defines a DHCPv4 option that carries a list of 32-bit
   (binary) IPv4 addresses indicating one or more CAPWAP ACs available
   to the WTP.

Calhoun                     Standards Track                     [Page 2]
RFC 5417                 CAPWAP AC DHCP Option                March 2009

   The DHCPv4 option for CAPWAP has the format shown in the following
   figure:

         0                   1
         0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         |  option-code  | option-length |

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