Depth-First Forwarding in Unreliable Networks (DFF)
draft-cardenas-dff-07

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Internet Engineering Task Force                          U. Herberg, Ed.
Internet-Draft                                               A. Cardenas
Intended status: Experimental                                    T. Iwao
Expires: April 22, 2013                                          Fujitsu
                                                                  M. Dow
                                                               Freescale
                                                             S. Cespedes
                                                 U. Icesi/U. of Waterloo
                                                        October 19, 2012

          Depth-First Forwarding in Unreliable Networks (DFF)
                         draft-cardenas-dff-07

Abstract

   This document specifies the "Depth-First Forwarding" (DFF) protocol
   for IPv6 networks, a data forwarding mechanism that can increase
   reliability of data delivery in networks with dynamic topology and/or
   lossy links.  The protocol operates entirely on the forwarding plane,
   but may interact with the routing plane.  DFF forwards data packets
   using a mechanism similar to a "depth-first search" for the
   destination of a packet.  The routing plane may be informed of
   failures to deliver a packet or loops.  This document specifies the
   DFF mechanism both for IPv6 networks (as specified in RFC2460) and in
   addition also for LoWPAN "mesh-under" networks (as specified in
   RFC4944).

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 22, 2013.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the

Herberg, et al.          Expires April 22, 2013                 [Page 1]
Internet-Draft                     DFF                      October 2012

   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1.  Motivation . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Notation and Terminology . . . . . . . . . . . . . . . . . . .  5
     2.1.  Notation . . . . . . . . . . . . . . . . . . . . . . . . .  5
     2.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Applicability Statement  . . . . . . . . . . . . . . . . . . .  6
   4.  Protocol Overview and Functioning  . . . . . . . . . . . . . .  8
     4.1.  Information Base Overview  . . . . . . . . . . . . . . . .  8
     4.2.  Signaling Overview . . . . . . . . . . . . . . . . . . . .  8
   5.  Protocol Dependencies  . . . . . . . . . . . . . . . . . . . .  9
   6.  Information Sets . . . . . . . . . . . . . . . . . . . . . . . 10
     6.1.  Candidate Next Hop List  . . . . . . . . . . . . . . . . . 10
     6.2.  Processed Set  . . . . . . . . . . . . . . . . . . . . . . 10
   7.  Packet Header Fields . . . . . . . . . . . . . . . . . . . . . 10
   8.  Protocol Parameters  . . . . . . . . . . . . . . . . . . . . . 11
   9.  Data Packet Generation and Processing  . . . . . . . . . . . . 11
     9.1.  Data Packets Entering the DFF Routing Domain . . . . . . . 12
     9.2.  Data Packet Processing . . . . . . . . . . . . . . . . . . 12
   10. Unsuccessful Packet Transmission . . . . . . . . . . . . . . . 15
   11. Determining the Next Hop for a Packet  . . . . . . . . . . . . 16
   12. Informing the Routing Protocol . . . . . . . . . . . . . . . . 16
   13. Sequence Numbers . . . . . . . . . . . . . . . . . . . . . . . 17
   14. Modes of Operation . . . . . . . . . . . . . . . . . . . . . . 17
     14.1. Route-Over . . . . . . . . . . . . . . . . . . . . . . . . 17
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