Dynamic Host Configuration (dhc)

Dynamic Host Configuration (dhc)
--------------------------------

Charter
Last Modified: 2008-12-10

Current Status: Active Working Group

Chair(s):
Ralph Droms <[email protected]>
John Jason Brzozowski <[email protected]>

Internet Area Director(s):
Jari Arkko <[email protected]>
Mark Townsley <[email protected]>

Internet Area Advisor:
Jari Arkko <[email protected]>

Mailing Lists:
General Discussion:[email protected]
To Subscribe: http://www1.ietf.org/mailman/listinfo/dhcwg
Archive: http://www.ietf.org/mail-archive/web/dhcwg/index.html

Description of Working Group:

The dhc working group (DHC WG) has developed DHCP for automated
allocation, configuration and management of IP addresses and TCP/IP
protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
is documented in RFC 2131 and RFC 2132. DHCPv6 is currently a
"Proposed Standard" and is documented in RFC 3315. Subsequent RFCs
document additional options and other enhancements to the
specifications.

The DHC WG is responsible for reviewing DHCP options or other
extensions (for both IPv4 and IPv6). The DHC WG is expected to review
all proposed extensions to DHCP to ensure that they are consistent
with the DHCP specification and other option formats, that they do not
duplicate existing mechanisms, etc. Generally speaking, the DHC WG
will not be responsible for evaluating the semantic content of
proposed options. Similarly, the ownership of specifications typically
belongs the relevant working group that needs more functionality from
DHCP, not the DHC WG. The DHC WG coordinates reviews of the proposed
options together with those working groups. It is required that those
working groups have consensus to take on the work and that the work is
within their charter. Exceptionally, with AD agreement, this same
process can also be used for Individual Submissions originating
outside WGs.

However, the DHC WG can in some cases develop its own options that
relate to either maintenance of existing specifications or
improvements in the operation of the DHCP infrastructure itself.

The DHC WG has the following main objectives:

* Develop extensions to the DHCP infrastructure as required to meet
new applications and deployments of DHCP. The topics currently
in development are:

- Subnet allocation mechanisms
- Virtual subnet identification option
- Option for passing DNS domain information in DHCPv6
- DHCP relay agent assignment notification in DHCPv6
- Option for DHCPv6 server reply sequence numbers
- Rebinding capability for DHCPv6 Reconfigure messages
- Behavior of layer 2 relay agents

The adoption of new items requires explicit agreement from
the AD or rechartering.

* Write analyses of the DHCPv4 and DHCPv6 specifications,
including RFC 2131, RFC 2132, RFC 3315 and other RFCs defining
additional options, which identifies ambiguities, contradictory
specifications and other obstacles to development of interoperable
implementations. Recommend a process for resolving identified
problems and incorporating the resolutions into the DHCP
specification.

Secondly, advance DHCPv4 (RFC 2131 and RFC 2132) and DHCPv6 (RFC
3315) in IETF Standards Track.

Thirdly, specify guidelines for creating new DHCP options, and
report on the status of DHCPv4 option reclassification.

* Assess the requirements for a dual-stack host to use DHCP to obtain
configuration settings for both IPv4 and IPv6. Hosts that include
implementations of both IPv4 and IPv6 ("dual-stack hosts") may use
DHCP to obtain configuration settings (including assigned addresses)
for both IPv4 and IPv6. The DHCPv4 and DHCPv6 specifications (RFC
2131, RFC 2132, RFC 3315 and subsequent RFCs) do not explicitly
explain how a dual-stack host uses DHCP to obtain configuration
settings for both IP stacks. The DHC WG will evaluate solutions for
configuration of dual-stack hosts through DHCP and select a solution
that will be developed and published by the WG.

* Hold a discussion whether on-link prefix information and default
router information is needed in DHCP in addition to router
advertisements. Actual solutions are out of scope for the WG,
however.

Goals and Milestones:

Done WG Last Call on DHCP Options for Internet Storage Name Service
(draft-ietf-dhc-isnsoption-03.txt)

Done WG Last Call on Load Balancing for DHCPv6
(draft-ietf-dhc-dhcpv6-loadb-02.txt)

Done WG Last Call on Time Configuration Options for DHCPv6
(draft-ietf-dhc-dhcpv6-opt-timeconfig-01.txt)

Done WG Last Call on IPv6 Prefix Options for DHCPv6
(draft-troan-dhcpv6-opt-prefix-delegation-02.txt)

Done WG Last Call on DNS Configuration options for DHCPv6
(draft-ietf-dhc-dhcpv6-opt-dnsconfig-01.txt)

Done WG Last Call on NIS Configuration Options for DHCPv6
(draft-ietf-dhc-dhcpv6-opt-nisconfig-01.txt)

Done Resubmit draft-ietf-dhc-dhcpv6-28.txt to IESG

Done Identify DHCPv4 authentication design team

Done Identify DHCPv4 specification review design team

Done Identify DHCPv4 relay agent message authentication design team

Done Submit DHCP Options for Internet Storage Name Service to IESG
(draft-ietf-dhc-isnsoption)

Done Submit DNS Configuration options for DHCPv6 to IESG
(draft-ietf-dhc-dhcpv6-opt-dnsconfig)

Done Submit NIS Configuratio Options for DHCPv6 to IESG
(draft-ietf-dhc-dhcpv6-opt-nisconfig)

Done Submit IPv6 Prefix Options for DHCPv6 to IESG
(draft-troan-dhcpv6-opt-prefix-delegation)

Done Submit 'Detection of Network Attachment (DNA) in IPv4' to IESG
(draft-ietf-dhc-dna-ipv4)

Done Resolve IPR issues around 'Rapid Commit Option for DHCPv4'

Done Publish report on dual-stack issues in DHCP
(draft-ietf-dhc-dual-stack)

Done Publish report on requirements for renumbering using stateless
DHCPv6 (draft-ietf-dhc-stateless-dhcpv6-renumbering)

Done Submit 'Lifetime Option for DHCPv6' to IESG
(draft-ietf-dhc-lifetime)

Done Submit 'Rapid Commit Option for DHCPv4' to IESG
(draft-ietf-dhc-rapid-commit-opt)

Done Submit DDNS/DHCP documents to IESG

Done Submit 'Node-Specific Client Identifiers for DHCPv4' to IESG
(draft-ietf-dhc-3315id-for-v4)

Done WG last call for 'Subnet Allocation Option'
<draft-ietf-dhc-subnet-alloc-04>

Done WG last call on 'Virtual Subnet Selection Option'
<draft-ietf-dhc-vpn-option>

Oct 2007 Submit 'Subnet Allocation Option'
(draft-ietf-dhc-subnet-alloc-04) to IESG for Proposed Standard

Nov 2007 WG last call on 'Guidelines for Creating New DHCP Options'
(draft-ietf-dhc-option-guidelines)

Nov 2007 Submit 'Virtual Subnet Selection Option',
(draft-ietf-dhc-vpn-option) and (draft-ietf-dhc-agent-vpn-id)
to IESG for Proposed Standard

Dec 2007 WG last call for 'Domain Suffix Option for DHCPv6'
(draft-ietf-dhc-dhcpv6-opt-dnsdomain)

Jan 2008 Submit 'Domain Suffix Option for DHCPv6'
(draft-ietf-dhc-dhcpv6-opt-dnsdomain) to IESG for Proposed
Standard

Jan 2008 Submit 'Guidelines for Creating New DHCP Options'
(draft-ietf-dhc-option-guidelines) to IESG for Best Current
Practice

Jan 2008 Develop plan for advancing DHCPv4 and DHCPv6 plan to include
completion of DHCPv4 specification review report,
'Implementation Issues with RFC 2131'
(draft-ietf-dhc-implementation) for Informational

Feb 2008 WG last call for 'Status of Reclassifying DHCPv4 Options'
(draft-ietf-dhc-status-3942)

Feb 2008 WG last call for 'Dual-stack clients and merging of data from
DHCPv4 and DHCPv6' (draft-ietf-dhc-dual-stack-merge); waiting
for more experience with IPv6 deployment

Feb 2008 WG last call for 'Rebind Capability in DHCPv6 Reconfigure
Messages' (draft-ietf-dhc-dhcpv6-reconfigure-rebind)

Mar 2008 Submit 'Status of Reclassifying DHCPv4 Options'
(draft-ietf-dhc-status-3942) to IESG for Informational

Apr 2008 2nd WG last call for 'DHCP Relay Agent Assignment Notification
Option (draft-ietf-dhc-dhcpv6-agentopt-delegate) and 'DHCPv6
Server Reply Sequence Number Option'
(draft-ietf-dhc-dhcpv6-srsn-option)

May 2008 Submit 'Rebind Capability in DHCPv6 Reconfigure Messages'
(draft-ietf-dhc-dhcpv6-reconfigure-rebind) to IESG for Proposed
Standard

Jun 2008 WG last call on 'Layer 2 Relay Agent Behaviour'
(draft-ietf-dhc-layer2-relay-agent)

Jul 2008 Submit 'Layer 2 Relay Agent Behaviour' to IESG
(draft-ietf-dhc-layer2-relay-agent) for Informational

Jul 2008 Submit 'DHCP Relay Agent Assignment Notification Option'
(draft-ietf-dhc-dhcpv6-agentopt-delegate) and 'DHCPv6 Server
Reply Sequence Number Option'
(draft-ietf-dhc-dhcpv6-srsn-option) to IESG for Proposed
Standard

Jul 2008 Recharter, if needed

Internet-Drafts:

Posted Revised I-D Title <Filename>
------ ------- --------------------------------------------
Jul 2001 Jul 2008 <draft-ietf-dhc-vpn-option-09.txt>
Virtual Subnet Selection Options for DHCPv4 and DHCPv6

Feb 2003 Jul 2008 <draft-ietf-dhc-subnet-alloc-07.txt>
Subnet Allocation Option

Aug 2006 Nov 2008 <draft-ietf-dhc-dhcpv6-reconfigure-rebind-06.txt>
Rebind Capability in DHCPv6 Reconfigure Messages

Sep 2007 Oct 2008 <draft-ietf-dhc-option-guidelines-03.txt>
Guidelines for Creating New DHCP Options

Jan 2008 Nov 2008 <draft-ietf-dhc-container-opt-04.txt>
Container Option for Server Configuration

Jan 2008 Oct 2008 <draft-ietf-dhc-l2ra-02.txt>
Layer 2 Relay Agent Information

Feb 2008 Nov 2008 <draft-ietf-dhc-dhcpv6-bulk-leasequery-05.txt>
DHCPv6 Bulk Leasequery

Jun 2008 Dec 2008 <draft-ietf-dhc-relay-id-suboption-06.txt>
The DHCPv4 Relay Agent Identifier Suboption

Aug 2008 Nov 2008 <draft-ietf-dhc-dhcpv6-opt-netboot-02.txt>
DHCPv6 option for network boot

Oct 2008 Oct 2008 <draft-ietf-dhc-leasequery-by-remote-id-00.txt>
DHCPv4 Leasequery by relay agent remote ID

Request For Comments:

RFC Stat Published Title
------- -- ----------- ------------------------------------
RFC1531 PS Oct 1993 Dynamic Host Configuration Protocol

RFC1532 PS Oct 1993 Clarifications and Extensions for the Bootstrap Protocol

RFC1534 DS Oct 1993 Interoperation Between DHCP and BOOTP

RFC1533 PS Oct 1993 DHCP Options and BOOTP Vendor Extensions

RFC1542 DS Oct 1993 Clarifications and Extensions for the Bootstrap Protocol

RFC1541 PS Oct 1993 Dynamic Host Configuration Protocol

RFC2131 DS Apr 1997 Dynamic Host Configuration Protocol

RFC2132 DS Apr 1997 DHCP Options and BOOTP Vendor Extensions

RFC2242 PS Nov 1997 Netware/IP Domain Name and Information

RFC2241 PS Nov 1997 DHCP Options for Novell Directory Services

RFC2485 PS Jan 1999 DHCP Option for The Open Group's User Authentication
Protocol

RFC2489BCP Jan 1999 Procedure for Defining New DHCP Options

RFC2563 PS May 1999 DHCP Option to Disable Stateless Auto-Configuration in
IPv4 Clients

RFC2610 PS Jun 1999 DHCP Options for Service Location Protocol

RFC2939BCP Oct 2000 Procedure for Defining New DHCP Options and Message
Types

RFC2937 PS Oct 2000 The Name Service Search Option for DHCP

RFC3011 PS Dec 2000 The Subnet Selection Option for DHCP

RFC3004 PS Dec 2000 The User Class Option for DHCP

RFC3046 PS Feb 2001 DHCP Relay Agent Information Option

RFC3074 PS Mar 2001 DHC load balancing algorithm

RFC3118 PS Jun 2001 Authentication for DHCP Messages

RFC3203 PS Dec 2001 DHCP reconfigure extension

RFC3256 PS Apr 2002 The DOCSIS Device Class DHCP Relay Agent Information
Sub-option

RFC3396 PS Nov 2002 Encoding Long Options in DHCPv4

RFC3442 PS Dec 2002 The Classless Static Route Option for Dynamic Host
Configuration Protocol (DHCP) version 4

RFC3495 PS Mar 2003 Dynamic Host Configuration Protocol (DHCP) Option for
CableLabs Client Configuration

RFC3527 PS Apr 2003 Link Selection sub-option for the Relay Agent
Information Option for DHCPv4

RFC3315 PS Jul 2003 Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

RFC3594 PS Sep 2003 PacketCable Security Ticket Control Sub-option for the
the DHCP CableLabs Client Configuration (CCC)Option

RFC3646Standard Dec 2003 DNS Configuration Options for DHCPv6

RFC3633Standard Dec 2003 IPv6 Prefix Options for DHCPv6

RFC3634Standard Jan 2004 KDC Server Address Sub-option

RFC3679 I Jan 2004 Unused DHCP Option Codes

RFC3736Standard Apr 2004 Stateless DHCP Service for IPv6

RFC3898Standard Oct 2004 NIS Configuration Options for DHCPv6

RFC3925Standard Nov 2004 Vendor-Identifying Vendor Options for DHCPv4

RFC3942Standard Dec 2004 Reclassifying DHCPv4 Options

RFC4014Standard Feb 2005 RADIUS Attributes Sub-option for the DHCP Relay Agent
Information Option

RFC3993Standard Mar 2005 DHCP Subscriber ID Suboption for the DHCP Relay Agent
Option

RFC4039Standard Apr 2005 Rapid Commit Option for the Dynamic Host Configuration
Protocol version 4 (DHCPv4)

RFC4030Standard Apr 2005 The Authentication Suboption for the DHCP Relay Agent
Option

RFC4075Standard May 2005 Simple Network Time Protocol (SNTP) Configuration Option
for DHCPv6

RFC4076 I May 2005 Renumbering Requirements for Stateless Dynamic Host
Configuration Protocol for IPv6 (DHCPv6)

RFC4174Standard Sep 2005 The IPv4 Dynamic Host Configuration Protocol (DHCP)
Options for the Internet Storage Name Service

RFC4242Standard Dec 2005 Information Refresh Time Option for Dynamic Host
Configuration Protocol for IPv6 (DHCPv6)

RFC4280Standard Dec 2005 Dynamic Host Configuration Protocol (DHCP) Options for
Broadcast and Multicast Control Servers

RFC4243Standard Dec 2005 Vendor-Specific Information Suboption for the Dynamic
Host Configuration Protocol (DHCP) Relay Agent Option

RFC4361Standard Feb 2006 Node-Specific Client Identifiers for Dynamic Host
Configuration Protocol Version Four (DHCPv4)

RFC4388 PS Feb 2006 Dynamic Host Configuration Protocol (DHCP) Leasequery

RFC4436 PS Mar 2006 Detecting Network Attachment in IPv4 (DNAv4)

RFC4477 I May 2006 Dynamic Host Configuration Protocol (DHCP): IPv4 and
IPv6 Dual-Stack Issues

RFC4580 PS Jun 2006 Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
Relay Agent Subscriber-ID Option

RFC4649 PS Aug 2006 Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
Relay Agent Remote-ID Option

RFC4704 PS Oct 2006 The Dynamic Host Configuration Protocol for IPv6
(DHCPv6) Client Fully Qualified Domain Name (FQDN)
Option

RFC4703 PS Oct 2006 Resolution of Fully Qualified Domain Name (FQDN)
Conflicts among Dynamic Host Configuration Protocol
(DHCP) Clients

RFC4702 PS Oct 2006 The Dynamic Host Configuration Protocol (DHCP) Client
Fully Qualified Domain Name (FQDN) Option

RFC4578 I Nov 2006 Dynamic Host Configuration Protocol (DHCP) Options for
the Intel Preboot eXecution Environment (PXE)

RFC4833 PS Apr 2007 A Timezone Option for DHCP

RFC5010 PS Sep 2007 The Dynamic Host Configuration Protocol Version 4
(DHCPv4) Relay Agent Flags Suboption

RFC5007 PS Sep 2007 DHCPv6 Leasequery

RFC4994 PS Sep 2007 DHCPv6 Relay Agent Echo Request Option

RFC5071 I Dec 2007 Dynamic Host Configuration Protocol Options Used by
PXELINUX

RFC5107 PS Feb 2008 DHCP Server Identifier Override Suboption

RFC5192 PS May 2008 DHCP Options for Protocol for Carrying Authentication
for Network Access (PANA) Authentication Agents