IPv6 over Link-Local Discovery Protocol
draft-richardson-anima-ipv6-lldp-04

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Last updated 2020-04-07
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anima Working Group                                        M. Richardson
Internet-Draft                                  Sandelman Software Works
Intended status: Standards Track                                  L. Xia
Expires: October 9, 2020                                          Huawei
                                                          April 07, 2020

                IPv6 over Link-Local Discovery Protocol
                  draft-richardson-anima-ipv6-lldp-04

Abstract

   This document describes a mechanism to encapsulate IPv6 packets over
   the Link Layer Discovery Protocol (LLDP).  The LLDP is a single
   layer-two protocol with its own ethertype.  It 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.

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   This Internet-Draft will expire on October 9, 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

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   (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 and restrictions with respect
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   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  . . .   5
     2.4.  Content of Payload - option 3 - RFC8138 compressed packet   5
   3.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Changelog . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

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

   The LLDP uses its own ethertype (0x88cc), and so is distinct from
   production IPv4 or IPv6 traffic that might appear on a network.
   Switching equipment is usually configured such that it does not
   forward LLDP packets.

   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

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   Software Defined Networking (SDN) controller.  The use of the stable
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