draft-ietf-dhc-options-opt127-00.txt   draft-ietf-dhc-options-opt127-01.txt 
Network Working Group R. Droms Network Working Group R. Droms
INTERNET DRAFT Bucknell University INTERNET DRAFT Bucknell University
Obsoletes: February 1996 Obsoletes: draft-ietf-dhc-options-opt127-00.txt February 1996
Expires August 1996 Expires August 1996
An Extension to the DHCP Option Codes An Extension to the DHCP Option Codes
<draft-ietf-dhc-options-opt127-00.txt> <draft-ietf-dhc-options-opt127-01.txt>
Status of this memo Status of this memo
This document is an Internet-Draft. Internet-Drafts are working This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas, documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute and its working groups. Note that other groups may also distribute
working documents as Internet-Drafts. working documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
skipping to change at page 2, line 9 skipping to change at page 2, line 9
Each option is assigned a one-octet option code. Options 128-254 are 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 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 options in the range 0-127 and option 255 have been assigned. This
document defines a new option to extend the available option codes. document defines a new option to extend the available option codes.
DRAFT An extension to the DHCP Option Codes February 1996 DRAFT An extension to the DHCP Option Codes February 1996
Definition of option 127 Definition of option 127
Option code 127 indicates that the DHCP option has a two-octet option Option code 127 indicates that the DHCP option has a two-octet
code. The format of these options is: extended option code. The format of these options is:
Code Len Data... Extended
+-----+-----+-----+-----+-----+---- Code Len option code Data...
| 127 | XXX | n | d1 | d2 | ... +-----+-----+-----+-----+-----+-----+----
+-----+-----+-----+-----+-----+---- | 127 | XXX | oh | ol | d1 | d2 | ...
+-----+-----+-----+-----+-----+-----+----
Other than the two-octet option code, these options are encoded and Other than the two-octet extended option code, these options are
carried in DHCP messages identically to the options defined in RFC encoded and carried in DHCP messages identically to the options
1533 [2]. 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 The two-octet extended option codes will be assigned through the
defined for the assignment of new options [3] after the current mechanisms defined for the assignment of new options [3] after the
one-octet option codes have been exhausted. current one-octet option codes have been exhausted.
References References
[1] Droms, R., "Dynamic Host Configuration Protocol", RFC 1531, [1] Droms, R., "Dynamic Host Configuration Protocol", RFC 1531,
Bucknell University, October 1993. Bucknell University, October 1993.
[2] Alexander, S. and R. Droms, "DHCP Options and BOOTP Vendor [2] Alexander, S. and R. Droms, "DHCP Options and BOOTP Vendor
Extensions", RFC 1533, Lachman Associates, October 1993. Extensions", RFC 1533, Lachman Associates, October 1993.
[3] Droms, R., "Procedure for Defining New DHCP Options", Work in [3] Droms, R., "Procedure for Defining New DHCP Options", Work in
 End of changes. 

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