Softwire Mesh Framework
RFC 5565
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RFC - Proposed Standard
(June 2009; No errata)
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Last updated |
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2015-10-14
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draft-wu-softwire-mesh-framework
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IETF
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plain text
pdf
html
bibtex
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WG state
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(None)
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Document shepherd |
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No shepherd assigned
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IESG state |
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RFC 5565 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Mark Townsley
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(None)
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Network Working Group J. Wu
Request for Comments: 5565 Y. Cui
Category: Standards Track Tsinghua University
C. Metz
E. Rosen
Cisco Systems, Inc.
June 2009
Softwire Mesh Framework
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Wu, et al. Standards Track [Page 1]
RFC 5565 Softwire Mesh Framework June 2009
Abstract
The Internet needs to be able to handle both IPv4 and IPv6 packets.
However, it is expected that some constituent networks of the
Internet will be "single-protocol" networks. One kind of single-
protocol network can parse only IPv4 packets and can process only
IPv4 routing information; another kind can parse only IPv6 packets
and can process only IPv6 routing information. It is nevertheless
required that either kind of single-protocol network be able to
provide transit service for the "other" protocol. This is done by
passing the "other kind" of routing information from one edge of the
single-protocol network to the other, and by tunneling the "other
kind" of data packet from one edge to the other. The tunnels are
known as "softwires". This framework document explains how the
routing information and the data packets of one protocol are passed
through a single-protocol network of the other protocol. The
document is careful to specify when this can be done with existing
technology and when it requires the development of new or modified
technology.
Table of Contents
1. Introduction ....................................................3
2. Specification of Requirements ...................................6
3. Scenarios of Interest ...........................................7
3.1. IPv6-over-IPv4 Scenario ....................................7
3.2. IPv4-over-IPv6 Scenario ....................................9
4. General Principles of the Solution .............................10
4.1. E-IP and I-IP .............................................10
4.2. Routing ...................................................10
4.3. Tunneled Forwarding .......................................11
5. Distribution of Inter-AFBR Routing Information .................11
6. Softwire Signaling .............................................13
7. Choosing to Forward through a Softwire .........................15
8. Selecting a Tunneling Technology ...............................15
9. Selecting the Softwire for a Given Packet ......................16
10. Softwire OAM and MIBs .........................................17
10.1. Operations and Maintenance (OAM) .........................17
10.2. MIBs .....................................................18
11. Softwire Multicast ............................................18
11.1. One-to-One Mappings ......................................18
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