Asymmetric Extended Route Optimization (AERO)
draft-templin-intarea-6706bis-05

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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Obsoletes: rfc5320, rfc5558, rfc5720,                  February 13, 2019
           rfc6179, rfc6706 (if
           approved)
Intended status: Standards Track
Expires: August 17, 2019

             Asymmetric Extended Route Optimization (AERO)
                  draft-templin-intarea-6706bis-05.txt

Abstract

   This document specifies the operation of IP over tunnel virtual links
   using Asymmetric Extended Route Optimization (AERO).  Nodes attached
   to AERO links can exchange packets via trusted intermediate routers
   that provide forwarding services to reach off-link destinations and
   route optimization services for improved performance.  AERO provides
   an IPv6 link-local address format that supports operation of the IPv6
   Neighbor Discovery (ND) protocol and links ND to IP forwarding.
   Dynamic link selection, mobility management, quality of service (QoS)
   signaling and route optimization are naturally supported through
   dynamic neighbor cache updates, while IPv6 Prefix Delegation (PD) is
   supported by network services such as the Dynamic Host Configuration
   Protocol for IPv6 (DHCPv6).  AERO is a widely-applicable tunneling
   solution especially well-suited to aviation services, mobile Virtual
   Private Networks (VPNs) and other applications as described in this
   document.

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 August 17, 2019.

Templin                  Expires August 17, 2019                [Page 1]
Internet-Draft                    AERO                     February 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
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   (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 . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Asymmetric Extended Route Optimization (AERO) . . . . . . . .   8
     3.1.  AERO Link Reference Model . . . . . . . . . . . . . . . .   8
     3.2.  AERO Node Types . . . . . . . . . . . . . . . . . . . . .   9
     3.3.  AERO Routing System . . . . . . . . . . . . . . . . . . .  10
     3.4.  AERO Addresses  . . . . . . . . . . . . . . . . . . . . .  12
     3.5.  AERO Interface Characteristics  . . . . . . . . . . . . .  14
     3.6.  AERO Interface Initialization . . . . . . . . . . . . . .  17
       3.6.1.  AERO Relay Behavior . . . . . . . . . . . . . . . . .  17
       3.6.2.  AERO Server Behavior  . . . . . . . . . . . . . . . .  17
       3.6.3.  AERO Client Behavior  . . . . . . . . . . . . . . . .  18
       3.6.4.  AERO Proxy Behavior . . . . . . . . . . . . . . . . .  18
     3.7.  AERO Interface Neighbor Cache Maintenance . . . . . . . .  19
     3.8.  AERO Interface Forwarding Algorithm . . . . . . . . . . .  20
       3.8.1.  Client Forwarding Algorithm . . . . . . . . . . . . .  21
       3.8.2.  Proxy Forwarding Algorithm  . . . . . . . . . . . . .  21
       3.8.3.  Server Forwarding Algorithm . . . . . . . . . . . . .  22
       3.8.4.  Relay Forwarding Algorithm  . . . . . . . . . . . . .  22
       3.8.5.  Processing Return Packets . . . . . . . . . . . . . .  23
     3.9.  AERO Interface Encapsulation and Re-encapsulation . . . .  24
     3.10. AERO Interface Decapsulation  . . . . . . . . . . . . . .  25
     3.11. AERO Interface Data Origin Authentication . . . . . . . .  25
     3.12. AERO Interface Packet Size Issues . . . . . . . . . . . .  26
     3.13. AERO Interface Error Handling . . . . . . . . . . . . . .  28
     3.14. AERO Router Discovery, Prefix Delegation and
           Autoconfiguration . . . . . . . . . . . . . . . . . . . .  31