Asymmetric Extended Route Optimization (AERO)
draft-templin-intarea-6706bis-19

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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Obsoletes: rfc5320, rfc5558, rfc5720,                    January 2, 2020
           rfc6179, rfc6706 (if
           approved)
Intended status: Standards Track
Expires: July 5, 2020

             Asymmetric Extended Route Optimization (AERO)
                    draft-templin-intarea-6706bis-19

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/registration 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 mobile internetworking service 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
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 5, 2020.

Templin                   Expires July 5, 2020                  [Page 1]
Internet-Draft                    AERO                      January 2020

Copyright Notice

   Copyright (c) 2020 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  . . . . . . . . . . . . . . . . . . . . . . . .   4
   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
       3.3.1.  IPv4 Compatibility Routing  . . . . . . . . . . . . .  15
     3.4.  AERO Addresses  . . . . . . . . . . . . . . . . . . . . .  15
     3.5.  Spanning Partitioned AERO Networks (SPAN) . . . . . . . .  17
       3.5.1.  SPAN Compatibility Addressing . . . . . . . . . . . .  21
     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  . . . . . . . . . . . .  30
       3.12.2.  Proxy Forwarding Algorithm . . . . . . . . . . . . .  31
       3.12.3.  Server/Gateway Forwarding Algorithm  . . . . . . . .  32
       3.12.4.  Relay Forwarding Algorithm . . . . . . . . . . . . .  33
     3.13. AERO Interface MTU and Fragmentation  . . . . . . . . . .  34
       3.13.1.  AERO MTU Requirements  . . . . . . . . . . . . . . .  36
     3.14. AERO Interface Error Handling . . . . . . . . . . . . . .  37
     3.15. AERO Router Discovery, Prefix Delegation and
           Autoconfiguration . . . . . . . . . . . . . . . . . . . .  40