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 2013Copyright 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
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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 2013Table 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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