Dynamic Host Configuration

The information below is for an old version of the document
Document Charter Dynamic Host Configuration WG (dhc) Snapshot
Title Dynamic Host Configuration
Last updated 1991-01-01
State Approved
WG State Active
IESG Responsible AD Suresh Krishnan
Charter Edit AD (None)
Send notices to (None)


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

  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

  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,