Autonomic Control Plane challenges for Layer-Two Switched Networks
draft-richardson-anima-l2-friendly-acp-00

Document Type Active Internet-Draft (individual)
Last updated 2020-07-26
Replaces draft-richardson-anima-ipv6-lldp
Stream (None)
Intended RFC status (None)
Formats plain text html xml pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
anima Working Group                                        M. Richardson
Internet-Draft                                  Sandelman Software Works
Intended status: Standards Track                                 J. Yang
Expires: 25 January 2021                   Huawei Technologies Co., Ltd.
                                                            24 July 2020

   Autonomic Control Plane challenges for Layer-Two Switched Networks
               draft-richardson-anima-l2-friendly-acp-00

Abstract

   This document details the challenges with building an Autonomic
   Control Plane on Campus/Enterprise networks which are built out of
   layer-two (Ethernet) switched technologies.

   This document does not propose a specific solution as yet, but
   details a number of possibilities, and what it would take to
   standardize each possibility.

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
   working documents as Internet-Drafts.  The list of current Internet-
   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 25 January 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Richardson & Yang        Expires 25 January 2021                [Page 1]
Internet-Draft               l2-friendly-acp                   July 2020

   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
   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.  Functional Requirements . . . . . . . . . . . . . . . . . . .   3
   3.  Nice to have Functionality  . . . . . . . . . . . . . . . . .   4
   4.  Possibilities . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Just use special destination  . . . . . . . . . . . . . .   4
     4.2.  Use another EtherType . . . . . . . . . . . . . . . . . .   5
     4.3.  Do something with EAPoL . . . . . . . . . . . . . . . . .   5
   5.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   9.  Changelog . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   5
     10.2.  Informative References . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   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 interlocking problem: the network may be unsafe
   for ACP discovery broadcasts without the support of Spanning Tree
   Protocol (STP) or similar mechanisms until configured, yet it can not
   be automatically configured until the ACP discovery (and onboarding
   process) is done.  Meantime, because of STP complicated topological
   calculations, the convergence can be very slow for larger networks.
   This can delay on-boarding.

Richardson & Yang        Expires 25 January 2021                [Page 2]
Internet-Draft               l2-friendly-acp                   July 2020

   In addition, forming a campus-wide network by default and using
   enabling STP does not work.  STP is not secure and could be easily
   spoofed by malicious or untrusted devices.  On manually configured
   networks today, STP is turned off on "access" ports, and enabled only
Show full document text