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DHCPv4 Bulk Leasequery
RFC 6926

Internet Engineering Task Force (IETF)                        K. Kinnear
Request for Comments: 6926                                      M. Stapp
Category: Standards Track                            Cisco Systems, Inc.
ISSN: 2070-1721                                               R. Desetti
                                                                B. Joshi
                                                            Infosys Ltd.
                                                              N. Russell
                                            Sea Street Technologies Inc.
                                                             P. Kurapati
                                                        Juniper Networks
                                                                 B. Volz
                                                     Cisco Systems, Inc.
                                                              April 2013

                         DHCPv4 Bulk Leasequery

Abstract

   The Dynamic Host Configuration Protocol for IPv4 (DHCPv4) Leasequery
   protocol allows a requestor to request information about DHCPv4
   bindings.  This protocol is limited to queries for individual
   bindings.  In some situations, individual binding queries may not be
   efficient or even possible.  This document extends the DHCPv4
   Leasequery protocol to allow for bulk transfer of DHCPv4 address
   binding data via TCP.

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/rfc6926.

Kinnear, et al.              Standards Track                    [Page 1]
RFC 6926                 DHCPv4 Bulk Leasequery               April 2013

Copyright Notice

   Copyright (c) 2013 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.

Kinnear, et al.              Standards Track                    [Page 2]
RFC 6926                 DHCPv4 Bulk Leasequery               April 2013

Table of Contents

   1. Introduction ....................................................4
   2. Terminology .....................................................5
   3. Design Goals ....................................................8
      3.1. Information Acquisition before Data Starts .................8
      3.2. Lessen Need for Caching and Negative Caching ...............8
      3.3. Antispoofing in 'Fast Path' ................................8
      3.4. Minimize Data Transmission .................................9
   4. Protocol Overview ...............................................9
   5. Interaction between UDP Leasequery and Bulk Leasequery .........11
   6. Message and Option Definitions .................................12
      6.1. Message Framing for TCP ...................................12
      6.2. New or Changed Options ....................................13
      6.3. Connection and Transmission Parameters ....................20
   7. Requestor Behavior .............................................21
      7.1. Connecting and General Processing .........................21
      7.2. Forming a Bulk Leasequery .................................21
      7.3. Processing Bulk Replies ...................................23
      7.4. Processing Time Values in Leasequery Messages .............25
      7.5. Querying Multiple Servers .................................26
      7.6. Making Sense out of Multiple Responses concerning
           a Single IPv4 Address .....................................26
      7.7. Multiple Queries to a Single Server over One Connection ...27
      7.8. Closing Connections .......................................28
   8. Server Behavior ................................................29
      8.1. Accepting Connections .....................................29

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