IP over Ethernet (IPoE) Session Health Checking
draft-patterson-intarea-ipoe-health-03

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intarea                                                     R. Patterson
Internet-Draft                                                    Sky UK
Intended status: Standards Track                          M. Abrahamsson
Expires: December 31, 2018                                     T-Systems
                                                           June 29, 2018

            IP over Ethernet (IPoE) Session Health Checking
                 draft-patterson-intarea-ipoe-health-03

Abstract

   PPP over Ethernet clients have the functionality to detect path
   unavailability by using PPP Keepalives.  IP over Ethernet does not
   have this functionality, and it is not specified in the IETF when an
   IP over Ethernet client should consider its WAN connectivity down,
   unless there is a physical layer link down event.

   This document describes a mechanism for IP over Ethernet clients to
   achieve connectivity validation, similar to that of PPP over
   Ethernet, by using BFD Echo, or ARP and Neighbor Discovery functions.

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 December 31, 2018.

Copyright Notice

   Copyright (c) 2018 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

Patterson & Abrahamsson Expires December 31, 2018               [Page 1]
Internet-Draft                 IPoE-Health                     June 2018

   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.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Alternative Mitigations . . . . . . . . . . . . . . . . . . .   4
   3.  IPoE Health Checks  . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Parameters  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  BFD Echo  . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.3.  Neighbor Discovery  . . . . . . . . . . . . . . . . . . .   5
     3.4.  ARP . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.5.  Alternative Target  . . . . . . . . . . . . . . . . . . .   6
     3.6.  Passive Checks  . . . . . . . . . . . . . . . . . . . . .   6
   4.  IPoE Health Check DHCP Options  . . . . . . . . . . . . . . .   6
     4.1.  DHCPv6  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  DHCPv4  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Action Behaviours . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Behaviour 0: Renew (Default)  . . . . . . . . . . . . . .   9
     5.2.  Behaviour 1: Rebind . . . . . . . . . . . . . . . . . . .   9
     5.3.  Behaviour 2: Solicit  . . . . . . . . . . . . . . . . . .   9
     5.4.  Behaviour 3: Expire & Release . . . . . . . . . . . . . .  10
     5.5.  LAN Considerations  . . . . . . . . . . . . . . . . . . .  10
   6.  Multihomed Clients  . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Neighbor Discovery  . . . . . . . . . . . . . . . . . . .  11
     6.2.  ARP . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   10. Appendix A. Changes from -00  . . . . . . . . . . . . . . . .  13
   11. Appendix B. Changes from -01  . . . . . . . . . . . . . . . .  13
   12. Appendix C. Changes from -02  . . . . . . . . . . . . . . . .  13
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  14
     13.2.  Informative References . . . . . . . . . . . . . . . . .  14
     13.3.  URIs . . . . . . . . . . . . . . . . . . . . . . . . . .  15