draft-ietf-dhc-agentoptions-device-class-00.txt   draft-ietf-dhc-agentoptions-device-class-01.txt 
INTERNET-DRAFT D. Jones INTERNET-DRAFT D. Jones
Dynamic Host Control Working Group YAS Corporation Dynamic Host Control Working Group YAS Corporation
Expires May 2001 R. Woundy Expires August 2001 R. Woundy
Cisco Cisco
November 2000 February 2001
Addition of Device Class to Agent Options Addition of Device Class to Agent Options
<draft-ietf-dhc-agentoptions-device-class-00.txt> <draft-ietf-dhc-agentoptions-device-class-01.txt>
Status of this Memo Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
skipping to change at page 1, line 35 skipping to change at page 1, line 35
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved. Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract Abstract
This document proposes a new sub-option to the DHCP Relay Information This document proposes a new sub-option to the DHCP Relay Information
Agent Option. This new sub-option is for use with DOCSIS cable Agent Option. This new sub-option is for use with DOCSIS cable
modems and describes a "device class" to which the cable modem modems and describes a "device class" to which the cable modem
belongs. The cable modem signals its device class information to the belongs. The cable modem signals its device class information to the
Relay Agent using DOCSIS signalling, and the Relay Agent forwards the Relay Agent using DOCSIS signalling, and the Relay Agent forwards the
device class information to the DHCP Server which can then make a device class information to the DHCP Server which can then make a
policy decision based on it. policy decision based on it.
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o host hardware capabilities o host hardware capabilities
o host software capabilities o host software capabilities
o host options information o host options information
The Device Class sub-option is coded as follows: The Device Class sub-option is coded as follows:
SubOpt Len Device Class SubOpt Len Device Class
+------+------+------+------+------+------+------+------+-- +------+------+------+------+------+------+------+------+--
| 4 | n | d1 | d2 | d3 | d4 | d5 | d6 | ... | TBD | n | d1 | d2 | d3 | d4 | d5 | d6 | ...
+------+------+------+------+------+------+------+------+-- +------+------+------+------+------+------+------+------+--
The DHCP server needs to understand the meaning of this sub-option in The DHCP server needs to understand the meaning of this sub-option in
order to offer different policy options in its reply to the host. DHCP order to offer different policy options in its reply to the host. DHCP
servers MAY use the Device Class for IP and other parameter assignment servers MAY use the Device Class for IP and other parameter assignment
policies for cable modems. policies for cable modems.
3. Security Considerations 3. Security Considerations
Operation of the DHCP Relay Agent Information Option relies on an Operation of the DHCP Relay Agent Information Option relies on an
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(e.g. CCCMs). This document assumes that the cable modem firmware is (e.g. CCCMs). This document assumes that the cable modem firmware is
trustworthy for DOCSIS signalling information. trustworthy for DOCSIS signalling information.
This document introduces a new identifier, the Device Class sub- This document introduces a new identifier, the Device Class sub-
option, that is provided by the relay agent device and is assumed to option, that is provided by the relay agent device and is assumed to
be trusted. Cryptographic or other techniques to authenticate the be trusted. Cryptographic or other techniques to authenticate the
Device Class are beyond the scope of this document. Device Class are beyond the scope of this document.
4. References 4. References
[1] M. Patrick, "DHCP Relay Agent Information Option", Internet-Draft [1] Patrick, M., "DHCP Relay Agent Information Option", RFC 3046,
<draft-ietf-dhc-agent-options-12.txt>, October 2000. January 2001.
[2] "Data-Over-Cable Service Interface Specifications: Cable Modem to [2] "Data-Over-Cable Service Interface Specifications: Cable Modem to
Customer Premise Equipment Interface Specification SP-CMCI-I04- Customer Premise Equipment Interface Specification SP-CMCI-I05-
000714", DOCSIS, July 2000, http://www.cablemodem.com. 001215", DOCSIS, December 2000, http://www.cablemodem.com.
[3] "Data-Over-Cable Service Interface Specifications: Cable Modem [3] "Data-Over-Cable Service Interface Specifications: Cable Modem
Radio Frequency Interface Specification SP-RFIv1_1-I05-000714", Radio Frequency Interface Specification SP-RFIv1.1-I06-001215",
DOCSIS, July 2000, http://www.cablemodem.com. DOCSIS, December 2000, http://www.cablemodem.com.
5. Authors' Addresses 5. Authors' Addresses
Doug Jones Doug Jones
YAS Corporation YAS Corporation
300 Brickstone Square 300 Brickstone Square
Andover, MA 01810 Andover, MA 01810
Phone: (303) 661-3823 Phone: (303) 661-3823
EMail: doug@yas.com EMail: doug@yas.com
Rich Woundy Rich Woundy
Cisco Systems Cisco Systems
250 Apollo Drive 250 Apollo Drive
Chelmsford, MA 01824 Chelmsford, MA 01824
Phone: (978) 244-8000 Phone: (978) 244-8000
EMail: rwoundy@cisco.com EMail: rwoundy@cisco.com
6. Full Copyright Statement 6. Full Copyright Statement
Copyright (C) The Internet Society (2000). All Rights Reserved. Copyright (C) The Internet Society (2001). All Rights Reserved.
This document and translations of it may be copied and furnished to This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of develop- Internet organizations, except as needed for the purpose of develop-
 End of changes. 

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