draft-ietf-dhc-dhcpv6-reconfigure-rebind-00.txt   draft-ietf-dhc-dhcpv6-reconfigure-rebind-01.txt 
Network Working Group D. Evans Network Working Group D. Evans
Internet-Draft ARRIS International, Inc. Internet-Draft ARRIS International, Inc.
Intended status: Informational R. Droms Intended status: Informational R. Droms
Expires: February 15, 2007 Cisco Systems, Inc. Expires: May 20, 2007 Cisco Systems, Inc.
August 14, 2006 November 16, 2006
Rebind Capability in DHCPv6 Reconfigure Messages Rebind Capability in DHCPv6 Reconfigure Messages
draft-ietf-dhc-dhcpv6-reconfigure-rebind-00.txt draft-ietf-dhc-dhcpv6-reconfigure-rebind-01.txt
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79. aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on February 15, 2007. This Internet-Draft will expire on May 20, 2007.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2006). Copyright (C) The Internet Society (2006).
Abstract Abstract
The Rebind message type in the Reconfigure Message option of a This document updtaes RFC 3315 to allow the Rebind message type to
Reconfigure message allows DHCPv6 servers to instruct clients to appear in the Reconfigure Message option of a Reconfigure message,
perform a Rebind operation. which allows DHCPv6 servers to instruct clients to perform a Rebind
operation as well as a Renew operation.
1. Introduction 1. Introduction
DHCPv6 [2] allows a server to send an unsolicited Reconfigure message DHCPv6 [2] allows a server to send an unsolicited Reconfigure message
to a client. The client's response to a Reconfigure message, to a client. The client's response to a Reconfigure message,
according to [2] is either a Renew or an Information-Request message, according to [2] is either a Renew or an Information-Request message,
depending on the contents of the msg-type field in the Reconfigure depending on the contents of the msg-type field in the Reconfigure
Message option of the Reconfigure message. Message option of the Reconfigure message.
In a network with multiple DHCPv6 servers, the Reconfigure message In a network with multiple DHCPv6 servers, the Reconfigure message
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Information-Request messages do not cause addressing configuration to Information-Request messages do not cause addressing configuration to
be returned. be returned.
This document expands the allowed values of the msg-type field to This document expands the allowed values of the msg-type field to
allow the server to indicate that the client is to attempt to perform allow the server to indicate that the client is to attempt to perform
a Rebind; since Rebind messages are multicast, this avoids the a Rebind; since Rebind messages are multicast, this avoids the
necessity of the client contacting a particular server. Rebind necessity of the client contacting a particular server. Rebind
messaegs also cause all configuration information, including messaegs also cause all configuration information, including
addresses, to be returned from a server. addresses, to be returned from a server.
This document updates section 19 of RFC 3315.
2. Terminology 2. Terminology
The key words MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD, The key words MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be
interpreted as described in [1]. interpreted as described in [1].
3. The Reconfigure Message option of the DHCPv6 Reconfigure Message 3. The Reconfigure Message option of the DHCPv6 Reconfigure Message
A server includes a Reconfigure Message option in a Reconfigure A server includes a Reconfigure Message option in a Reconfigure
message to indicate to the client whether the client responds with a message to indicate to the client whether the client responds with a
Renew, an Information-request, or a Rebind message. The format of Renew, an Information-request, or a Rebind message.
this option is:
The format of this option is:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| OPTION_RECONF_MSG | option-len | | OPTION_RECONF_MSG | option-len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg-type | | msg-type |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
option-code OPTION_RECONF_MSG (19). option-code OPTION_RECONF_MSG (19).
option-len 1. option-len 1.
msg-type 5 for Renew message, 6 for Rebind, 11 for msg-type 5 for Renew message, 6 for Rebind, 11 for
Information-request message. Information-request message.
4. Security Considerations 4. Security Considerations
This document adds no new security considerations beyond those This document adds no new security considerations beyond those
present in [2]. present in [2].
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