A modified charter has been submitted for the Softwires (softwire) working
group in the Internet Area of the IETF. The IESG has not made any
determination as yet. The modified charter is provided below for
informational purposes only. Please send your comments to the IESG
mailing list (iesg@ietf.org) by Tuesday, April 26, 2011.
Softwires (softwire)
**DRAFT 2011-04-14** (v03)
--------------------
Current Status: Active
Chairs:
Alain Durand <adurand@juniper.net>
Yong Cui <cuiyong@tsinghua.edu.cn>
Internet Area Directors:
Ralph Droms <rdroms.ietf@gmail.com>
Jari Arkko <jari.arkko@piuha.net>
Internet Area Advisor:
Ralph Droms <rdroms.ietf@gmail.com>
Mailing Lists:
General Discussion: softwires@ietf.org
To Subscribe: softwires-request@ietf.org
Archive:
http://www.ietf.org/mail-archive/web/softwires/current/maillist.html
Description of Working Group:
The Softwires Working Group is specifying the standardization of
discovery, control and encapsulation methods for connecting IPv4
networks across IPv6 networks and IPv6 networks across IPv4 networks
in a way that will encourage multiple, inter-operable
implementations.
For various reasons, native IPv4 and/or IPv6 transport may not be
available in all cases, and there is a need to tunnel IPv4 in IPv6
or IPv6 in IPv4 to cross a part of the network which is not IPv4 or
IPv6 capable. The Softwire Problem Statement, RFC 4925, identifies
two distinct topological scenarios that the WG will provide
solutions for: "Hubs and Spokes" and "Mesh." In the former case,
hosts or "stub" networks are attached via individual,
point-to-point, IPv4 over IPv6 or IPv6 over IPv4 softwires to a
centralized Softwire Concentrator. In the latter case (Mesh),
network islands of one Address Family (IPv4 or IPv6) are connected
over a network of another Address Family via point to multi-point
softwires among Address family Border Routers (AFBRs).
The WG will reuse existing technologies as much as possible and only
when necessary, create additional protocol building blocks.
For generality, all base Softwires encapsulation mechanisms should
support all combinations of IP versions over one other (IPv4 over
IPv6, IPv6 over IPv4, IPv4 over IPv4, IPv6 over IPv6). IPv4 to IPv6
translation mechanisms (NAT-PT), new addressing schemes, and block
address assignments are out of scope. DHCP options developed in this
working group will be reviewed jointly with the DHC WG. RADIUS
attributes developed in this working group will be reviewed jointly
with the RADEXT WG. The MIB Doctors directorate will be asked to
review any MIB modules developed in the SOFTWIRE working group. BGP
and other routing and signaling protocols developed in this group
will be reviewed jointly with the proper working groups and other
workings that may take interest (e.g. IDR, L3VPN, PIM, LDP, SAAG,
etc).
The specific work areas for this working group are:
1. Developments for Mesh softwires topology; the Mesh topology work
will be reviewed in the l3vpn and idr WGs
- multicast
- MIB module
2. Developments for 6rd:
- multicast
- operational specification
- RADIUS option for 6rd server
- MIB module
3. Developments for Dual-Stack Lite (DS-Lite):
- multicast
- operational specification
- RADIUS option for AFTR
- proxy extensions; GI-DS-Lite; DS-Lite with no NAT or NAT on the
B4 element
- MIB module
4. Developments for stateless legacy IPv4 carried over IPv6
- develop a solution motivation document to be published as an
RFC
- develop a protocol specification response to the solution
motivation
document; this work item will not be taken through WG last call
until the solution motivation document has been published
5. Finalize discovery and configuration mechanisms for a gateway to
use DS-Lite or 6rd; these discovery and configuration mechanisms
must take into a account other operating environments such as
dual-stack and tunneling mechanisms not defined by the softwire
WG. Development of new mechanisms will involve the dhc and/or
v6ops WGs as appropriate
Other work items would require WG approval and rechartering.
Goals and Milestones:
Apr 2011 Submit DS-lite RADIUS option for Proposed Standard
Apr 2011 Adopt DS-lite operational document as WG document
Jul 2011 Submit 6rd RADIUS option for Proposed Standard
Jul 2011 Submit GI DS-lite for Proposed Standard
Jul 2011 Adopt B4NAT as WG document
Aug 2011 Adopt 6rd operational document as WG document
Aug 2011 Adopt Multicast extensions document as WG document
Aug 2011 Submit DS-lite operational document for Informational
Sep 2011 Submit B4NAT for Informational
Nov 2011 Submit Multicast extensions document for Informational
Nov 2011 Submit 6rd operational document for Informational
Nov 2011 Adopt 6rd MIB module as WG document
Nov 2011 Adopt DS-lite MIB module as WG document
Nov 2011 Adopt Mesh topology MIB module as WG document
Nov 2012 Submit 6rd MIB module for Proposed Standard
Nov 2012 Submit DS-lite MIB module for Proposed Standard
Nov 2012 Submit Mesh topology MIB module for Proposed Standard
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