--- 1/draft-ietf-dhc-options-opt127-00.txt 2006-02-04 23:05:05.000000000 +0100 +++ 2/draft-ietf-dhc-options-opt127-01.txt 2006-02-04 23:05:05.000000000 +0100 @@ -1,18 +1,18 @@ Network Working Group R. Droms INTERNET DRAFT Bucknell University -Obsoletes: February 1996 +Obsoletes: draft-ietf-dhc-options-opt127-00.txt February 1996 Expires August 1996 An Extension to the DHCP Option Codes - + Status of this memo This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any @@ -43,35 +43,39 @@ Each option is assigned a one-octet option code. Options 128-254 are reserved for local use and at this time over half of the available options in the range 0-127 and option 255 have been assigned. This document defines a new option to extend the available option codes. DRAFT An extension to the DHCP Option Codes February 1996 Definition of option 127 - Option code 127 indicates that the DHCP option has a two-octet option - code. The format of these options is: + Option code 127 indicates that the DHCP option has a two-octet + extended option code. The format of these options is: - Code Len Data... - +-----+-----+-----+-----+-----+---- - | 127 | XXX | n | d1 | d2 | ... - +-----+-----+-----+-----+-----+---- + Extended + Code Len option code Data... + +-----+-----+-----+-----+-----+-----+---- + | 127 | XXX | oh | ol | d1 | d2 | ... + +-----+-----+-----+-----+-----+-----+---- - Other than the two-octet option code, these options are encoded and - carried in DHCP messages identically to the options defined in RFC - 1533 [2]. + Other than the two-octet extended option code, these options are + encoded and carried in DHCP messages identically to the options + defined in RFC 1533 [2]. The high-order and low-order octets of the + extended option code are stored in 'oh' and 'ol', respectively. The + number of octets given in the 'len' field includes the two-octet + extended option code. - The two-octet option codes will be assigned through the mechanisms - defined for the assignment of new options [3] after the current - one-octet option codes have been exhausted. + The two-octet extended option codes will be assigned through the + mechanisms defined for the assignment of new options [3] after the + current one-octet option codes have been exhausted. References [1] Droms, R., "Dynamic Host Configuration Protocol", RFC 1531, Bucknell University, October 1993. [2] Alexander, S. and R. Droms, "DHCP Options and BOOTP Vendor Extensions", RFC 1533, Lachman Associates, October 1993. [3] Droms, R., "Procedure for Defining New DHCP Options", Work in