Improving the Reaction of Customer Edge Routers to IPv6 Renumbering Events
draft-ietf-v6ops-cpe-slaac-renum-07

Document Type Active Internet-Draft (v6ops WG)
Authors Fernando Gont  , Jan Zorz  , Richard Patterson  , Bernie Volz 
Last updated 2021-02-25 (latest revision 2021-02-16)
Replaces draft-gont-v6ops-cpe-slaac-renum
Stream IETF
Intended RFC status Best Current Practice
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Reviews
Stream WG state Submitted to IESG for Publication
Doc Shepherd Follow-up Underway
Document shepherd Owen DeLong
Shepherd write-up Show (last changed 2020-07-07)
IESG IESG state Approved-announcement to be sent::Revised I-D Needed
Action Holders
Consensus Boilerplate Yes
Telechat date On agenda of 2021-02-25 IESG telechat (returning item)
Responsible AD Warren Kumari
Send notices to Owen DeLong <owen@delong.com>, v6ops-chairs@ietf.org
IANA IANA review state IANA OK - No Actions Needed
IPv6 Operations Working Group (v6ops)                            F. Gont
Internet-Draft                                              SI6 Networks
Updates: 7084 (if approved)                                      J. Zorz
Intended status: Best Current Practice                          6connect
Expires: August 20, 2021                                    R. Patterson
                                                                  Sky UK
                                                                 B. Volz
                                                                   Cisco
                                                       February 16, 2021

  Improving the Reaction of Customer Edge Routers to IPv6 Renumbering
                                 Events
                  draft-ietf-v6ops-cpe-slaac-renum-07

Abstract

   This document specifies improvements to Customer Edge Routers that
   help mitigate the problems that may arise when network configuration
   information becomes invalid, without any explicit signaling of that
   condition to the local nodes.  This document updates RFC7084.

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 August 20, 2021.

Copyright Notice

   Copyright (c) 2021 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

Gont, et al.             Expires August 20, 2021                [Page 1]
Internet-Draft       Reaction to Renumbering Events        February 2021

   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
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Improved Customer Edge Router Behavior  . . . . . . . . . . .   3
     3.1.  Automatic DHCPv6 RELEASEs . . . . . . . . . . . . . . . .   4
     3.2.  Stability of IAIDs  . . . . . . . . . . . . . . . . . . .   4
     3.3.  Interface Between WAN-side and LAN-side . . . . . . . . .   4
     3.4.  LAN-side Option Lifetimes . . . . . . . . . . . . . . . .   5
     3.5.  Signaling Stale Configuration Information . . . . . . . .   7
   4.  Recommended Option Lifetimes Configuration Values . . . . . .   9
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   In scenarios where network configuration information becomes invalid
   without any explicit signaling of that condition (such as when a
   Customer Edge Router crashes and reboots without knowledge of the
   previously-employed configuration information), hosts on the local
   network will continue using stale information for an unacceptably
   long period of time, thus resulting in connectivity problems.  This
   problem is documented in detail in [I-D.ietf-v6ops-slaac-renum].

   This document specifies improvements to Customer Edge (CE) Routers
   that help mitigate the aforementioned problem for residential and
   small office scenarios.  It specifies recommendations for the default
   behavior of CE Routers, and does not preclude the availability of
   configuration knobs that might allow an operator or user to manually-
   configure the CE Router to deviate from these recommendations.  This
   document updates RFC7084.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
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