wdiff draft-ietf-mip6-vsm-02.txt draft-ietf-mip6-vsm-03.txt

This
MIP6 Working Group V. Devarapalli
Internet-Draft Azaire Networks
Intended status: Standards Track A. Patel
Expires: April 7, 2008 K. Leung
Cisco
October 5, 2007

Mobile IPv6 Vendor Specific Option
draft-ietf-mip6-vsm-03.txt

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Abstract

There is replaced a need for vendor specific extensions to Mobility Header
messages so that Mobile IPv6 vendors are able to extend the protocol
for research or deployment purposes. This document defines a new
vendor specific mobility option.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Vendor Specific Mobility Option . . . . . . . . . . . . . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6
Intellectual Property and Copyright Statements . . . . . . . . . . 7

1. Introduction

Vendor specific messages have traditionally allowed vendors to
implement extensions to some protocols and distinguish themselves
from other vendors. These messages are clearly marked by an updated version, a Vendor ID
that identifies the vendor. A particular vendor's implementation
identifies the vendor extension by recognizing the Vendor ID.
Implementations that do not recognize the Vendor ID either discard or
skip processing the
Secretariat has been notified message.

Mobile IPv6 [2] is being deployed and there is a need for vendor
specific extensions to Mobility Header messages so that vendors are
able to extend the Mobile IPv6 protocol for research or deployment
purposes.

This document is under official review defines a new mobility option, the Vendor Specific
Mobility option, which can be carried in any Mobility Header message.
The Vendor Specific mobility option MUST be used only with a Mobility
Header message. Mobility options, by definition, can be skipped if
an implementation does not recognize the
IESG or has been passed mobility option type [2].

The messages defined in this document can also be used for NEMO [3]
and Proxy MIPv6 [4] since these protocols also use Mobility Header
messages.

Vendor-specific protocol extensions can cause serious
interoperability issues and may in addition have adverse operational
impact, if they are not designed and used carefully. The vendor-
specific option described in this document is meant to support simple
use cases where it is sufficient to include some vendor data in the RFC Editor
standardized Mobile IPv6 protocol exchanges. The vendor-specific
option is not suitable for review and/or publication as more complex vendor extensions that modify
Mobile IPv6 itself. Although these options allow vendors to
piggyback additional data onto Mobile IPv6 message exchanges, RFC
3775 [2] requires that unrecognized options be ignored and that the
end systems be able to process the remaining parts of the message
correctly. Extensions that use the vendor specifc mobility option
should require an
RFC. This Internet-Draft indication that the option was not published as an RFC.

Internet-Drafts processed, in the
response, using the vendor specific mobility option.

Vendors are not archival documents, generally encouraged to bring their protocol extensions
to the IETF for review and copies standardization. Complex vendor
extensions that modify Mobile IPv6 itself, will see large-scale
deployment or involve industry consortia or other multi-vendor
organizations MUST be standardized in the IETF. Past experience has
shown that such extensions of Internet-Drafts IETF protocols are critically dependent
on IETF review and standardization.

2. Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [1].

3. Vendor Specific Mobility Option

The Vendor Specific Mobility Option can be included in any Mobility
Header message and has an alignment requirement of 4n+2. If the
Mobility Header message includes a Binding Authorization Data option
[2], then the Vendor Specific mobility option should appear before
the Binding Authorization Data option. Multiple Vendor Specific
mobility options MAY be present in a Mobility Header message.

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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Vendor ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sub-Type | Data.......
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Type

A 8-bit field indicating that have
been deleted from it is a Vendor Specific mobility
option.

Length

A 8-bit field indicating the length of the option in octets
excluding the Type and the directory Length fields. All other fields are not available.
included.

Vendor ID

The Secretariat does SMI Network Management Private Enterprise Code of the IANA
maintained Private Enterprise Numbers registry [5].

Sub-type

A 8-bit field indicating the type of vendor specific information
carried in the option. The administration of the Sub-type is done
by the Vendor.

Data

Vendor specific data that is carried in this message.

4. Security Considerations

The Vendor Specific mobility messages should be protected in a manner
similar to Binding Updates and Binding acknowledgements if it carries
information that should not be revealed on the wire or that can
affect the binding cache entry at the home agent or the correspondent
node. In particular the messages containing the Vendor Specific
mobility option MUST be integrity protected.

5. IANA Considerations

The Vendor Specific mobility option defined in Section 3, should have
any
the type value allocated from the same space as the Mobility Options
registry created by RFC 3775 [2].

6. Acknowledgements

The author would like to thank Jari Arkko and Basavaraj Patil with
whom the contents of this document were discussed first.

7. References

7.1. Normative References

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

[2] Johnson, D., Perkins, C., and J. Arkko, "Mobility Support in
IPv6", RFC 3775, June 2004.

7.2. Informative References

[3] Devarapalli, V., Wakikawa, R., Petrescu, A., and P. Thubert,
"Network Mobility (NEMO) Basic Support Protocol", RFC 3963,
January 2005.

[4] Gundavelli, S., "Proxy Mobile IPv6",
draft-sgundave-mip6-proxymip6-02 (work in progress), March 2007.

[5] IANA Assigned Numbers Online Database, "Private Enterprise
Numbers", http://www.iana.org/assignments/enterprise-numbers .

Authors' Addresses

Vijay Devarapalli
Azaire Networks
4800 Great America Pkwy
Santa Clara, CA 95054
USA

Email: vijay.devarapalli@azairenet.com

Alpesh Patel
Cisco
170 West Tasman Drive
San Jose, CA 95134
USA

Email: alpesh@cisco.com

Kent Leung
Cisco
170 West Tasman Drive
San Jose, CA 95134
USA

Email: kleung@cisco.com

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Vijay Devarapalli <vijay.devarapalli@azairenet.com> information to the IETF at
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