Node-specific Client Identifiers for Dynamic Host Configuration Protocol Version Four (DHCPv4)
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com>, dhc mailing list <firstname.lastname@example.org>, dhc chair <email@example.com> Subject: Protocol Action: 'Node-Specific Client Identifiers for DHCPv4' to Proposed Standard The IESG has approved the following document: - 'Node-Specific Client Identifiers for DHCPv4 ' <draft-ietf-dhc-3315id-for-v4-06.txt> as a Proposed Standard This document is the product of the Dynamic Host Configuration Working Group. The IESG contact persons are Margaret Wasserman and Mark Townsley. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-dhc-3315id-for-v4-06.txt
- Technical Summary This document specifies the way in which DHCPv4 clients should identify themselves. DHCPv4 client implementations that conform to this specification use a DHCPv6-style DHCP Unique Identifier (DUID) encapsulated in a DHCPv4 client identifier option. This supersedes the behavior specified in RFC2131 and RFC2132. The reason for making this change is that as we make the transition from IPv4 to IPv6, there will be network devices that must use both DHCPv4 and DHCPv6. Users of these devices will have a smoother network experience if the devices identify themselves consistently, regardless of the version of DHCP they are using at any given moment. Most obviously, DNS updates made by the DHCP server on behalf of the client will not be handled correctly. This change also addresses certain limitations in the functioning of RFC2131/2132-style DHCP client identifiers. This document first describes the problem to be solved. It then states the new technique that is to be used to solve the problem. Finally, it describes the specific changes that one would have to make to RFC2131 and RFC2132 in order for those documents not to contradict what is described in this document. This document updates RFC2131 and RFC2132. DHCPv4 server implementations SHOULD conform to this document. DHCPv4 clients on network devices that are expected to support DHCPv6 in the future SHOULD conform to this document. This document makes no changes to the behavior of DHCPv6 clients or servers. DHCPv4 clients and servers that are implemented according to this document should be implemented as if the changes specified in section 4.3 and 4.4 have been made to RFC2131 and RFC2132. - Working Group Summary The WG has given this document careful review, It has been discussed extensively at WG meetings and on the WG mailing list. There was substantive discussion during the WG last call. - Protocol Quality The WG has given this document careful review. It extends the client-identifier option defined in RFC 2131 and RFC 2132 based on the definition of the DUID in DHCPv6. The extension is necessary for interoperability in hosts that use both DHCPv4 and DHCPv6. The document includes text changes for RFC 2131 that will be incorporated into the DHCP specification when it is revised for Full Standard.