Lightweight DHCPv6 Relay Agent
RFC 6221
Document | Type |
RFC - Proposed Standard
(May 2011; Errata)
Updates RFC 3315
|
|
---|---|---|---|
Authors | Wojciech Dec , Sven Ooghe , Alan Kavanagh , Suresh Krishnan , David Miles | ||
Last updated | 2015-10-14 | ||
Replaces | draft-miles-dhc-dhcpv6-ldra | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6221 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ralph Droms | ||
IESG note | Ted Lemon (mellon@nominum.com) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) D. Miles, Ed. Request for Comments: 6221 S. Ooghe Updates: 3315 Alcatel-Lucent Category: Standards Track W. Dec ISSN: 2070-1721 Cisco Systems S. Krishnan A. Kavanagh Ericsson May 2011 Lightweight DHCPv6 Relay Agent Abstract This document proposes a Lightweight DHCPv6 Relay Agent (LDRA) that is used to insert relay agent options in DHCPv6 message exchanges identifying client-facing interfaces. The LDRA can be implemented in existing access nodes (such as Digital Subscriber Link Access Multiplexers (DSLAMs) and Ethernet switches) that do not support IPv6 control or routing functions. 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/rfc6221. Miles, et al. Standards Track [Page 1] RFC 6221 LDRA May 2011 Copyright Notice Copyright (c) 2011 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. Table of Contents 1. Introduction ....................................................3 1.1. Requirements Language ......................................3 2. Background ......................................................3 3. Terminology .....................................................3 4. Server Considerations ...........................................5 5. Message Format ..................................................5 5.1. Relay-Forward Message ......................................5 5.2. Relay-Reply Message ........................................6 5.3. Mandatory DHCP Options .....................................6 5.3.1. Relay-Message Option ................................6 5.3.2. Interface-ID Option .................................6 6. Agent Behaviour .................................................7 6.1. Relaying a Client Message ..................................7 6.1.1. Client Message Validation ...........................8 6.1.2. Trusted and Untrusted Interfaces ....................8 6.2. Relaying a Relay-Reply Message from the Network ............8 7. Network Topology ................................................9 7.1. Client and Server on Same Link .............................9 7.2. Client and Server behind Relay Agent ......................11 7.3. Relay Agent in Front of LDRA ..............................12 8. Contributors ...................................................15 9. Security Considerations ........................................15 10. References ....................................................15 10.1. Normative References .....................................15 10.2. Informative References ...................................16 Miles, et al. Standards Track [Page 2] RFC 6221 LDRA May 2011 1. Introduction DHCPv6 Relay Agents [RFC3315] are deployed to forward DHCPv6 messages between clients and servers when they are not on the same IPv6 link and are often implemented alongside a routing function in a common node. A Lightweight DHCPv6 Relay Agent (LDRA) allows Relay Agent Information to be inserted by an access node that performs a link- layer bridging (i.e., non-routing) function. An LDRA resides on theShow full document text