Destination/Source Routing
draft-ietf-rtgwg-dst-src-routing-03

Document Type Active Internet-Draft (rtgwg WG)
Last updated 2016-11-14
Replaces draft-lamparter-rtgwg-dst-src-routing
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rtgwg                                                       D. Lamparter
Internet-Draft                                                    NetDEF
Intended status: Standards Track                              A. Smirnov
Expires: May 18, 2017                                Cisco Systems, Inc.
                                                       November 14, 2016

                       Destination/Source Routing
                  draft-ietf-rtgwg-dst-src-routing-03

Abstract

   This note specifies using packets' source addresses in route lookups
   as additional qualifier to be used in route lookup.  This applies to
   IPv6 [RFC2460] in general with specific considerations for routing
   protocol left for separate documents.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 18, 2017.

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   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Lamparter & Smirnov       Expires May 18, 2017                  [Page 1]
Internet-Draft         Destination/Source Routing          November 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Dual-connected home / SOHO network  . . . . . . . . . . .   3
     2.2.  Degree of traffic engineering . . . . . . . . . . . . . .   4
     2.3.  Distributed filtering based on source address . . . . . .   5
   3.  Principle of operation  . . . . . . . . . . . . . . . . . . .   5
     3.1.  Lookup ordering and disambiguation  . . . . . . . . . . .   6
     3.2.  Ordering Rationale  . . . . . . . . . . . . . . . . . . .   6
     3.3.  Backtracking caveats  . . . . . . . . . . . . . . . . . .   7
     3.4.  Multi-FIB lookup  . . . . . . . . . . . . . . . . . . . .   7
   4.  Routing protocol considerations . . . . . . . . . . . . . . .   9
     4.1.  Source information  . . . . . . . . . . . . . . . . . . .   9
     4.2.  Loop-freeness considerations  . . . . . . . . . . . . . .  10
     4.3.  Recursive routing . . . . . . . . . . . . . . . . . . . .  11
   5.  Applicability To Specific Situations  . . . . . . . . . . . .  11
     5.1.  Recursive Route Lookups . . . . . . . . . . . . . . . . .  11
       5.1.1.  Recursive route expansion . . . . . . . . . . . . . .  12
     5.2.  Unicast Reverse Path Filtering  . . . . . . . . . . . . .  13
     5.3.  Multicast Reverse Path Forwarding . . . . . . . . . . . .  13
   6.  Interoperability  . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Interoperability in Distance-Vector Protocols . . . . . .  14
     6.2.  Interoperability in Link-State Protocols  . . . . . . . .  15
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   9.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  16
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   11. Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .  17
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  17
     12.2.  Informative References . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   Both IPv4 [RFC0791] and IPv6 [RFC2460] architectures specify that
   determination of the outgoing interface and next-hop gateway for
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