Active DHCPv4 Lease Query
RFC 7724
Document | Type |
RFC - Proposed Standard
(December 2015; No errata)
Updates RFC 6926
|
|
---|---|---|---|
Authors | Kim Kinnear , Mark Stapp , Bernie Volz , Neil Russell | ||
Last updated | 2015-12-18 | ||
Replaces | draft-kinnear-dhc-dhcpv4-active-leasequery | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Tomek Mrugalski | ||
Shepherd write-up | Show (last changed 2015-08-12) | ||
IESG | IESG state | RFC 7724 (Proposed Standard) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Brian Haberman | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) K. Kinnear Request for Comments: 7724 M. Stapp Updates: 6926 B. Volz Category: Standards Track Cisco Systems ISSN: 2070-1721 N. Russell Staples December 2015 Active DHCPv4 Lease Query Abstract The Dynamic Host Configuration Protocol for IPv4 (DHCPv4) has been extended with a Leasequery capability that allows a requestor to request information about DHCPv4 bindings (RFC 4388). That mechanism is limited to queries for individual bindings. In some situations, individual binding queries may not be efficient, or even possible. In addition, continuous update of an external requestor with Leasequery data is sometimes desired. This document expands on the DHCPv4 Leasequery protocol, and allows for active transfer of near real-time DHCPv4 binding information data via TCP. This document updates RFC 6926, "DHCPv4 Bulk Leasequery". 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/rfc7724. Kinnear, et al. Standards Track [Page 1] RFC 7724 Active DHCPv4 Lease Query December 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. Kinnear, et al. Standards Track [Page 2] RFC 7724 Active DHCPv4 Lease Query December 2015 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 6 4. Interaction Between Active Leasequery and Bulk Leasequery . . 8 5. Message and Option Definitions . . . . . . . . . . . . . . . 9 5.1. Message Framing for TCP . . . . . . . . . . . . . . . . . 9 5.2. New or Changed Options . . . . . . . . . . . . . . . . . 9 5.2.1. dhcp-message-type . . . . . . . . . . . . . . . . . . 10 5.2.2. dhcp-status-code . . . . . . . . . . . . . . . . . . 10 5.3. Connection and Transmission Parameters . . . . . . . . . 11 6. Information Communicated by Active Leasequery . . . . . . . . 11 7. Requestor Behavior . . . . . . . . . . . . . . . . . . . . . 12 7.1. General Processing . . . . . . . . . . . . . . . . . . . 12 7.2. Initiating a Connection . . . . . . . . . . . . . . . . . 13 7.3. Forming an Active Leasequery . . . . . . . . . . . . . . 14 7.4. Processing Active Replies . . . . . . . . . . . . . . . . 15 7.4.1. Processing Replies from a Request Containing a query-start-time . . . . . . . . . . . . . . . . . . 17 7.5. Closing Connections . . . . . . . . . . . . . . . . . . . 19 8. Server Behavior . . . . . . . . . . . . . . . . . . . . . . . 19 8.1. Accepting Connections . . . . . . . . . . . . . . . . . . 19 8.1.1. Update to RFC 6926 . . . . . . . . . . . . . . . . . 21 8.2. Replying to an Active Leasequery . . . . . . . . . . . . 21 8.3. Multiple or Parallel Queries . . . . . . . . . . . . . . 23 8.4. Closing Connections . . . . . . . . . . . . . . . . . . . 24 9. Security Considerations . . . . . . . . . . . . . . . . . . . 24 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 25 11. References . . . . . . . . . . . . . . . . . . . . . . . . . 26 11.1. Normative References . . . . . . . . . . . . . . . . . . 26Show full document text