DHCPv6 Active Leasequery
RFC 7653

Document Type RFC - Proposed Standard (October 2015; No errata)
Updates RFC 5460
Last updated 2015-10-14
Replaces draft-raghuvanshi-dhc-dhcpv6-active-leasequery
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Sheng Jiang
Shepherd write-up Show (last changed 2015-07-07)
IESG IESG state RFC 7653 (Proposed Standard)
Consensus Boilerplate Yes
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Responsible AD Brian Haberman
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IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                    D. Raghuvanshi
Request for Comments: 7653                                    K. Kinnear
Updates: 5460                                                 D. Kukrety
Category: Standards Track                            Cisco Systems, Inc.
ISSN: 2070-1721                                             October 2015

                        DHCPv6 Active Leasequery

Abstract

   The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) has been
   extended with a Leasequery capability that allows a requestor to
   request information about DHCPv6 bindings.  That mechanism is limited
   to queries for DHCPv6 binding data updates prior to the time the
   DHCPv6 server receives the Leasequery request.  Continuous update of
   an external requestor with Leasequery data is sometimes desired.
   This document expands on the DHCPv6 Leasequery protocol and allows
   for active transfer of real-time DHCPv6 binding information data via
   TCP.  This document also updates DHCPv6 Bulk Leasequery (RFC 5460) by
   adding new options.

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
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7653.

Raghuvanshi, et al.          Standards Track                    [Page 1]
RFC 7653                DHCPv6 Active Leasequery            October 2015

Copyright Notice

   Copyright (c) 2015 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Raghuvanshi, et al.          Standards Track                    [Page 2]
RFC 7653                DHCPv6 Active Leasequery            October 2015

Table of Contents

   1. Introduction ....................................................4
   2. Terminology .....................................................4
   3. Protocol Overview ...............................................6
   4. Interaction between Active Leasequery and Bulk Leasequery .......8
   5. Extension to DHCPv6 Bulk Leasequery .............................8
   6. Message and Option Definitions ..................................9
      6.1. Message Framing for TCP ....................................9
      6.2. Messages ...................................................9
           6.2.1. ACTIVELEASEQUERY ....................................9
           6.2.2. STARTTLS ...........................................10
           6.2.3. Response Messages ..................................10
      6.3. Options ...................................................10
           6.3.1. OPTION_LQ_BASE_TIME ................................10
           6.3.2. OPTION_LQ_START_TIME ...............................11
           6.3.3. OPTION_LQ_END_TIME .................................12
      6.4. Connection and Transmission Parameters ....................12
   7. Information Communicated by Active Leasequery ..................13
   8. Requestor Behavior .............................................14
      8.1. General Processing ........................................14
      8.2. Initiating a Connection ...................................14
      8.3. Forming an Active Leasequery ..............................15
      8.4. Processing Active Replies .................................16
           8.4.1. Processing Replies from a Request Containing an
                  OPTION_LQ_START_TIME ...............................18
      8.5. Processing Time Values in Leasequery Messages .............20
      8.6. Examples ..................................................21
           8.6.1. Query Failure ......................................21
           8.6.2. Data Missing on Server .............................21
           8.6.3. Successful Query ...................................21
      8.7. Closing Connections .......................................22
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