IPv6 over Link-Local Discovery Protocol
draft-richardson-anima-ipv6-lldp-02

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Last updated 2019-12-18
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anima Working Group                                        M. Richardson
Internet-Draft                                  Sandelman Software Works
Intended status: Standards Track                        18 December 2019
Expires: 20 June 2020

                IPv6 over Link-Local Discovery Protocol
                  draft-richardson-anima-ipv6-lldp-02

Abstract

   This document describes a mechanism to encapsulate IPv6 packets over
   the Link-Local Discovery Protocol (LLDP).  The LLDP is a single
   layer-two protocol and is never forwarded, which is a desireable
   property when building the IPv6-over-IPsec-over-IPv6-Link-Local
   tunnels that make up the ANIMA Autonomic Control Plane (ACP).

   This unorthodox encapsulation avoids unwanted interactions between
   the ACP packets and native packet forwarding engines, as well as
   being safe for layer-2 switches which might otherwise have no IPv6
   capabilities.

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 20 June 2020.

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 publication of this document.
   Please review these documents carefully, as they describe your rights

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   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Protocol  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  LLDP Encapsulation  . . . . . . . . . . . . . . . . . . .   3
     2.2.  Content of Payload - option 1 - entire IPv6 packet  . . .   4
     2.3.  Content of Payload - option 2 - elided IPv6 packet  . . .   4
     2.4.  Content of Payload - option 3 - RFC8138 compressed
           packet  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   7.  Changelog . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The IEEE802.1AB Link Layer Discovery Protocol (LLDP) is a one-hop,
   vendor-neutral link-layer protocol used by end host network Things
   for advertising their identity, capabilities, and neighbors on an
   IEEE 802 local area network.

   Its Type-Length-Value (TLV) design allows for "vendor-specific"
   extensions to be defined.  IANA has a registered IEEE 802
   organizationally unique identifier (OUI) defined as documented in
   [RFC7042].

   The creation and maintenance of the Autonomic Control Plane described
   in [I-D.ietf-anima-autonomic-control-plane] requires creation of hop-
   by-hop discovery of adjacent systems.  There are Campus L2 systems
   that are not broadcast safe until they have been connected to their
   Software Defined Networking (SDN) controller.  The use of the stable
   connectivity provided by [RFC8368] can provide the SDN connectivity
   required.

   There is a bootstrap problem: the network may be unsafe for ACP
   discovery broadcasts until configured, and it can not be

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   autonomically configured until the ACP discovery (and onboarding
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