IPoE Client Health Checking
draft-patterson-intarea-ipoe-health-02

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Last updated 2018-06-19
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intarea                                                     R. Patterson
Internet-Draft                                                    Sky UK
Intended status: Standards Track                          M. Abrahamsson
Expires: December 21, 2018                                     T-Systems
                                                           June 19, 2018

                      IPoE Client Health Checking
                 draft-patterson-intarea-ipoe-health-02

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's not specified 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 way 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

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on December 21, 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Patterson & Abrahamsson Expires December 21, 2018               [Page 1]
Internet-Draft                 IPoE-Health                     June 2018

   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Alternative Mitigations . . . . . . . . . . . . . . . . . . .   3
   3.  IPoE Health Checks  . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Parameters  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  BFD Echo  . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Neighbor Discovery  . . . . . . . . . . . . . . . . . . .   5
     3.4.  ARP . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.5.  Alternative Target  . . . . . . . . . . . . . . . . . . .   5
     3.6.  Passive Checks  . . . . . . . . . . . . . . . . . . . . .   5
   4.  Action Behaviours . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Behaviour 0: Renew (Default)  . . . . . . . . . . . . . .   6
     4.2.  Behaviour 1: Rebind . . . . . . . . . . . . . . . . . . .   6
     4.3.  Behaviour 2: Solicit  . . . . . . . . . . . . . . . . . .   7
     4.4.  Behaviour 3: Expire & Release . . . . . . . . . . . . . .   7
     4.5.  LAN Considerations  . . . . . . . . . . . . . . . . . . .   8
   5.  DHCP Option . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  DHCPv6  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  DHCPv4  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Multihomed Clients  . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Neighbor Discovery  . . . . . . . . . . . . . . . . . . .  10
     6.2.  ARP . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   10. Appendix A. Changes from -00  . . . . . . . . . . . . . . . .  11
   11. Appendix B. Changes from -01  . . . . . . . . . . . . . . . .  11
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     12.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   PPP [RFC1661] makes use of regular LCP echos and replies to
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