Asymmetric Extended Route Optimization (AERO)
draft-templin-intarea-6706bis-12

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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Obsoletes: rfc5320, rfc5558, rfc5720,                        May 1, 2019
           rfc6179, rfc6706 (if
           approved)
Intended status: Standards Track
Expires: November 2, 2019

             Asymmetric Extended Route Optimization (AERO)
                  draft-templin-intarea-6706bis-12.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 to manage the routing system.
   Dynamic 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
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   This Internet-Draft will expire on November 2, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Templin                 Expires November 2, 2019                [Page 1]
Internet-Draft                    AERO                          May 2019

   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
   publication of this document.  Please review these documents
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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 . . . . . . . . . . . . . . . . . . . . .  11
     3.3.  AERO Routing System . . . . . . . . . . . . . . . . . . .  13
     3.4.  AERO Addresses  . . . . . . . . . . . . . . . . . . . . .  15
     3.5.  Spanning Partitioned AERO Networks (SPAN) . . . . . . . .  16
     3.6.  AERO Interface Characteristics  . . . . . . . . . . . . .  20
     3.7.  AERO Interface Initialization . . . . . . . . . . . . . .  24
       3.7.1.  AERO Relay Behavior . . . . . . . . . . . . . . . . .  24
       3.7.2.  AERO Server Behavior  . . . . . . . . . . . . . . . .  24
       3.7.3.  AERO Gateway Behavior . . . . . . . . . . . . . . . .  25
       3.7.4.  AERO Proxy Behavior . . . . . . . . . . . . . . . . .  25
       3.7.5.  AERO Client Behavior  . . . . . . . . . . . . . . . .  25
     3.8.  AERO Interface Neighbor Cache Maintenance . . . . . . . .  26
     3.9.  AERO Interface Forwarding Algorithm . . . . . . . . . . .  28
       3.9.1.  Client Forwarding Algorithm . . . . . . . . . . . . .  29
       3.9.2.  Proxy Forwarding Algorithm  . . . . . . . . . . . . .  29
       3.9.3.  Server Forwarding Algorithm . . . . . . . . . . . . .  30
       3.9.4.  Gateway Forwarding Algorithm  . . . . . . . . . . . .  31
       3.9.5.  Relay Forwarding Algorithm  . . . . . . . . . . . . .  31
     3.10. AERO Interface Encapsulation and Re-encapsulation . . . .  31
     3.11. AERO Interface Decapsulation  . . . . . . . . . . . . . .  32
     3.12. AERO Interface Data Origin Authentication . . . . . . . .  32
     3.13. AERO Interface Packet Size Issues . . . . . . . . . . . .  33
     3.14. AERO Interface Error Handling . . . . . . . . . . . . . .  35
     3.15. AERO Router Discovery, Prefix Delegation and
           Autoconfiguration . . . . . . . . . . . . . . . . . . . .  38
       3.15.1.  AERO ND/PD Service Model . . . . . . . . . . . . . .  38
       3.15.2.  AERO Client Behavior . . . . . . . . . . . . . . . .  39