Enhanced IPv6 Stateless Address autoconfiguration
draft-luo-6man-ipv6-ra-prefix-flag-00

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Last updated 2019-07-01
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IPv6 maintenance Working Group(6man)                             Lin Luo
Internet-Draft                                           H3C Corporation
Intended status: Standards Track                            Qianli Zhang
Expires: December 30, 2019                           Tsinghua University
                                                           HaiHong Zhang
                                                         H3C Corporation
                                                           June 30, 2019

           Enhanced IPv6 Stateless Address autoconfiguration
                 draft-luo-6man-ipv6-ra-prefix-flag-00

Abstract

   This document specifies new flag in the format of a Prefix
   Information Option, IPv6 routers advertise the address refresh
   capability and address generation mechanism to IPv6 hosts.

Status of This Memo

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Luo, et al.            Expires December 30, 2019                [Page 1]
Internet-Draft            IPv6 RA Prefix Flag                  June 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Specification of Requirements . . . . . . . . . . . . . . . .   2
   3.  Algorithm Specification . . . . . . . . . . . . . . . . . . .   3
     3.1.  Prefix Information Option . . . . . . . . . . . . . . . .   3
     3.2.  Router processing  . . . . . . . . . . . . . . . . . . .    4
     3.3.  Host processing  . . . . . . . . . . . . . . . . . . . .    5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
   6.  Normative References  . . . . . . . . . . . . . . . . . . . . . 6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 7

 

Luo, et al.            Expires December 30, 2019                [Page 2]
Internet-Draft            IPv6 RA Prefix Flag                  June 2019

1.  Introduction

   The IPv6 Neighbor Discovery (ND) Protocol [RFC4861] specifies router
   advertisement message contains Prefix Information Option, [RFC4862]
   specifies Stateless Address Autoconfiguration (SLAAC), On the other
   hand, Dynamic Host Configuration Protocol for IPv6 (DHCPv6) [RFC8415]
   is used when a site requires tighter control over exact address
   assignments.

   IPv6 hosts generate addresses composed of prefix advertised by
   router, an Interface Identifier(IID) in [RFC4291] typically embeds
   the link-layer address. In [RFC4941], the concept of a temporary
   address is proposed for privacy concerns, the host randomly generates
   a temporary identification and the temporary address is regenerated
   on a periodic basis. [RFC6724] recommends the host needs to prefer
   the temporary address above the public address. Various new forms of
   IIDs have been defined, including Cryptographically Generated
   Addresses (CGAs) [RFC4982] of Secure Neighbor Discovery (SEND)
   [RFC3971] and others.

   The security and privacy implications of different IPv6 IIDs are
   discussed, and [RFC8064] recommends semantically opaque address as
   the default scheme for generating IPv6 stable addresses with SLAAC.
   Otherwise, the mechanism of temporary address generation and address
   selection are widely used by most operating systems.

   This document specifies a new flag in the format of a Prefix
   Information Option, IPv6 routers advertise the address refresh
   capability and address generation mechanism to IPv6 hosts. Despite
   hosts choose any IIDs generation forms, according to address refresh
   capability, it is easy to perform extending lifetime of temporary
   address and public address. [RFC7136] specifies IIDs MUST be viewed
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