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Versions: 00 01 02 03 04 05 RFC 3898

Network Working Group                                 A.K. Vijayabhaskar
Internet-Draft                                           Hewlett-Packard
Expires: August 17, 2002                                     17 Feb 2002


                  NIS Configuration Options for DHCPv6
               draft-ietf-dhc-dhcpv6-opt-nisconfig-00.txt

Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

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   This Internet-Draft will expire on August 17, 2002.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document describes four options for NIS-related configuration
   information in DHCPv6: NIS Servers, NIS+ Servers, NIS Client Domain
   Name, NIS+ Client Domain name.


1. Introduction

   This document describes four options for configuration information
   related to Network Information Service (NIS) in DHCPv6 [2].

2. Requirements

   The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
   SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL, when they appear in this
   document, are to be interpreted as described in RFC 2119 [1]




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3. Terminology

   This document uses terminology specific to IPv6 and DHCPv6 as defined
   in section "Terminology" of the DHCP specification.

4. Network Information Service (NIS) Servers option

   The Network Information Service Servers option provides a list of
   one or more IP addresses of NIS servers available to the client. The
   NIS servers SHOULD be listed in the order of preference.

   The format of the Network Information Service Servers option is as
   as shown below:

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      OPTION_NIS_SERVERS       |         option-len            |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      |                   NIS server (IP address)                     |
      |                                                               |
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      |                   NIS server (IP address)                     |
      |                                                               |
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                              ...                              |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   option-code:   OPTION_NIS_SERVERS (tbd)

   option-len: Length of the 'NIS server' fields in octets; It must be
      a multiple of 16

   NIS server:    IP address of NIS server

5. Network Information Service V2 (NIS+) Servers option

   The Network Information Service V2 (NIS+) Servers option provides
   a list of one or more IP addresses of NIS+ servers available to
   the client. The NIS+ servers SHOULD be listed in the order of
   preference.

   The format of the Network Information Service V2 (NIS+) Servers
   option is as shown below:








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       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      OPTION_NISP_SERVERS      |         option-len            |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      |                   NIS+ server (IP address)                    |
      |                                                               |
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      |                   NIS+ server (IP address)                    |
      |                                                               |
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                              ...                              |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   option-code:   OPTION_NISP_SERVERS (tbd)

   option-len: Length of the 'NIS+ server' fields in octets; It must be
      a multiple of 16

   NIS+ server:    IP address of NIS+ server

6.  Network Information Service (NIS) Domain Name option

    The Network Information Service (NIS) Domain Name option is used
    by the server to convey client's NIS Domain Name info to the
    client.

    The format of the NIS Domain Name option is as shown below:

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |    OPTION_NIS_DOMAIN_NAME     |         option-len            |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                       nis-domain-name                         |
      |                              ...                              |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   option-code:   OPTION_NIS_DOMAIN_NAME (tbd)

   option-len: Length of the 'nis-domain-name' field in octets

   nis-domain-name:   NIS Domain name for client

   The 'nis-domain-name' MUST be encoded as specified in section
   "Representation and use of domain names" of the DHCPv6
   specification [2].




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7.  Network Information Service V2 (NIS+) Domain Name option

    The Network Information Service V2 (NIS+) Domain Name option is
    used by the server to convey client's NIS+ Domain Name info to the
    client.

    The format of the NIS+ Domain Name option is as shown below:

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |    OPTION_NISP_DOMAIN_NAME    |         option-len            |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                       nisp-domain-name                        |
      |                              ...                              |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   option-code:   OPTION_NISP_DOMAIN_NAME (tbd)

   option-len: Length of the 'nisp-domain-name' field in octets

   nisp-domain-name:   NIS+ Domain name for client

   The 'nisp-domain-name' MUST be encoded as specified in section
   "Representation and use of domain names" of the DHCPv6
   specification [2].

8. Appearance of these option

   The NIS servers, NIS+ servers, NIS domain name and NIS+ domain name
   options MUST appear only in the following messages: Solicit,
   Advertise, Request, Confirm, Renew, Rebind, Information-Request,
   Reply.

9. Security Considerations

   The NIS servers, NIS+ servers, NIS domain name and NIS+ domain name
   options may be used by an intruder DHCP server to assign invalid NIS
   parameters, resulting in clients unable to use NIS.

   To avoid attacks through these options, the DHCP client SHOULD use
   authenticated DHCP (see section "Authentication of DHCP messages"
   in the DHCPv6 specification [2]).

10. IANA Considerations

   IANA is requested to assign an option code to these options from the
   option-code space defined in section "DHCPv6 Options" of the DHCPv6
   specification [2].

References

   [1]  Bradner, S., "Key words for use in RFCs to Indicate Requirement
        Levels", BCP 14, RFC 2119, March 1997.


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   [2]  Bound, J., Carney, M., Perkins, C., Lemon, T., Volz, B. and R.
        Droms (ed.), "Dynamic Host Configuration Protocol for IPv6
        (DHCPv6)", draft-ietf-dhc-dhcpv6-23 (work in progress), February
        2002.

Author's Addresses

   Vijayabhaskar A K
   Hewlett-Packard ESD-I
   29, Cunningham Road
   Bangalore - 560052
   India

   Phone: +91-080-2051424
   EMail: vijayak@india.hp.com









































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Internet-Draft     NIS Configuration Options for DHCPv6         Feb 2002

Full Copyright Statement

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.


























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