DHCPv6 Relay Agent Assignment Notification (RAAN) Option
draft-ietf-dhc-dhcpv6-agentopt-delegate-05
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Active Internet-Draft (dhc WG)
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2017-04-01
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IETF
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Intended RFC status |
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Proposed Standard
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plain text
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bibtex
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WG state
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WG Document
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Document shepherd |
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Tomek Mrugalski
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IESG state |
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I-D Exists
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Consensus Boilerplate |
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Yes
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(None)
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Send notices to |
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Tomek Mrugalski <tomasz.mrugalski@gmail.com>
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Network Working Group R. Droms
Internet-Draft
Intended status: Standards Track B. Volz
Expires: October 3, 2017 Cisco Systems
O. Troan
Cisco Systems, Inc.
April 1, 2017
DHCPv6 Relay Agent Assignment Notification (RAAN) Option
draft-ietf-dhc-dhcpv6-agentopt-delegate-05.txt
Abstract
The DHCP Relay Agent Assignment Notification (RAAN) option is sent
from a DHCP server to a DHCP relay agent to inform the relay agent of
IPv6 addresses that have been assigned or IPv6 prefixes that have
been delegated to DHCP clients.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 3, 2017.
Copyright Notice
Copyright (c) 2017 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
Droms, et al. Expires October 3, 2017 [Page 1]
Internet-Draft DHCPv6 Assignment Notification Option April 2017
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language and Terminology . . . . . . . . . . . . 3
3. Option Semantics and Usage . . . . . . . . . . . . . . . . . 3
4. Relay Agent Behavior . . . . . . . . . . . . . . . . . . . . 4
5. Server Behavior . . . . . . . . . . . . . . . . . . . . . . . 4
6. Option Format . . . . . . . . . . . . . . . . . . . . . . . . 4
7. Encapsulating DHCP Options in the RAAN Option . . . . . . . . 5
7.1. IA Address Option . . . . . . . . . . . . . . . . . . . . 5
7.2. IA Prefix Option . . . . . . . . . . . . . . . . . . . . 6
8. Requesting Assignment Information from the DHCP Server . . . 6
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
10. Security Considerations . . . . . . . . . . . . . . . . . . . 6
11. Changes Log . . . . . . . . . . . . . . . . . . . . . . . . . 7
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
12.1. Normative References . . . . . . . . . . . . . . . . . . 8
12.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
The DHCP Relay Agent Assignment Notification (RAAN) option
encapsulates address and prefix options to indicate that an address
or prefix has been assigned. The option may also carry other
information required by the network element for configuration related
to the assigned address or prefix.
For example, a relay agent uses the RAAN option to learn when a
prefix that has been delegated through DHCP prefix delegation (PD) to
a DHCP client. The relay agent notifies the network element on which
it is implemented of the delegation information so the network
element can add routing information about the delegated prefix into
the routing infrastructure.
While the practice to date for DHCPv6 has been for the relay agents
to "snoop" the client's message (encapsulated in the received Relay
Message option, and which is forwarded to the client), this will no
longer be possible when clients and servers use
[I-D.ietf-dhc-sedhcpv6] to encrypt their communication.
Use of the RAAN option has another benefit in that the Reply to a
client's Release message, which does not have any useful information
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