Asymmetric Extended Route Optimization (AERO)
draft-templin-intarea-6706bis-16

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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Obsoletes: rfc5320, rfc5558, rfc5720,                      June 29, 2019
           rfc6179, rfc6706 (if
           approved)
Intended status: Standards Track
Expires: December 31, 2019

             Asymmetric Extended Route Optimization (AERO)
                  draft-templin-intarea-6706bis-16.txt

Abstract

   This document specifies the operation of IP over tunnel virtual links
   using Asymmetric Extended Route Optimization (AERO).  AERO interfaces
   use an IPv6 link-local address format that supports operation of the
   IPv6 Neighbor Discovery (ND) protocol and links ND to IP forwarding.
   Prefix delegation services are employed for network admission and to
   manage the routing system.  Multilink operation, mobility management,
   quality of service (QoS) signaling and route optimization are
   naturally supported through dynamic neighbor cache updates.  Standard
   IP multicasting services are also supported.  AERO is a widely-
   applicable tunneling solution especially well-suited to aviation
   services, mobile Virtual Private Networks (VPNs) and many other
   applications.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 31, 2019.

Templin                 Expires December 31, 2019               [Page 1]
Internet-Draft                    AERO                         June 2019

Copyright Notice

   Copyright (c) 2019 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
   (https://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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Asymmetric Extended Route Optimization (AERO) . . . . . . . .  10
     3.1.  AERO Link Reference Model . . . . . . . . . . . . . . . .  10
     3.2.  AERO Node Types . . . . . . . . . . . . . . . . . . . . .  12
     3.3.  AERO Routing System . . . . . . . . . . . . . . . . . . .  13
     3.4.  AERO Addresses  . . . . . . . . . . . . . . . . . . . . .  15
     3.5.  Spanning Partitioned AERO Networks (SPAN) . . . . . . . .  17
     3.6.  AERO Interface Characteristics  . . . . . . . . . . . . .  21
     3.7.  AERO Interface Initialization . . . . . . . . . . . . . .  24
       3.7.1.  AERO Server/Gateway Behavior  . . . . . . . . . . . .  25
       3.7.2.  AERO Proxy Behavior . . . . . . . . . . . . . . . . .  25
       3.7.3.  AERO Client Behavior  . . . . . . . . . . . . . . . .  25
       3.7.4.  AERO Relay Behavior . . . . . . . . . . . . . . . . .  26
     3.8.  AERO Interface Neighbor Cache Maintenance . . . . . . . .  26
     3.9.  AERO Interface Encapsulation and Re-encapsulation . . . .  28
     3.10. AERO Interface Decapsulation  . . . . . . . . . . . . . .  29
     3.11. AERO Interface Data Origin Authentication . . . . . . . .  29
     3.12. AERO Interface Forwarding Algorithm . . . . . . . . . . .  30
       3.12.1.  Client Forwarding Algorithm  . . . . . . . . . . . .  31
       3.12.2.  Proxy Forwarding Algorithm . . . . . . . . . . . . .  31
       3.12.3.  Server/Gateway Forwarding Algorithm  . . . . . . . .  32
       3.12.4.  Relay Forwarding Algorithm . . . . . . . . . . . . .  34
     3.13. AERO Interface MTU and Fragmentation  . . . . . . . . . .  34
       3.13.1.  MTU and Fragmentation in the ATN/IPS . . . . . . . .  37
     3.14. AERO Interface Error Handling . . . . . . . . . . . . . .  37
     3.15. AERO Router Discovery, Prefix Delegation and
           Autoconfiguration . . . . . . . . . . . . . . . . . . . .  40
       3.15.1.  AERO ND/PD Service Model . . . . . . . . . . . . . .  40
       3.15.2.  AERO Client Behavior . . . . . . . . . . . . . . . .  41