IKEv2 Notification Codes for IPv4/IPv6 Coexistence
draft-boucadair-ipsecme-ipv6-ipv4-codes-03
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Network Working Group M. Boucadair
Internet-Draft Orange
Updates: 7296 (if approved) September 20, 2018
Intended status: Standards Track
Expires: March 24, 2019
IKEv2 Notification Codes for IPv4/IPv6 Coexistence
draft-boucadair-ipsecme-ipv6-ipv4-codes-03
Abstract
This document specifies new IKEv2 notification codes to better manage
IPv4 and IPv6 co-existence.
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 March 24, 2019.
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
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.
Boucadair Expires March 24, 2019 [Page 1]
Internet-Draft An Update to RFC7296 September 2018
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Why Not INTERNAL_ADDRESS_FAILURE? . . . . . . . . . . . . . . 3
4. An Update to RFC7296 . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.1. Normative References . . . . . . . . . . . . . . . . . . 5
8.2. Informative References . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
As described in [RFC7849], if the subscription data or network
configuration allows only one IP address family (IPv4 or IPv6), the
cellular host must not request a second PDP-Context to the same APN
for the other IP address family. The Third Generation Partnership
Project (3GPP) network informs the cellular host about allowed Packet
Data Protocol (PDP) types by means of Session Management (SM) cause
codes. In particular, the following cause codes can be returned:
o cause #50 "PDP type IPv4 only allowed": This cause code is used by
the network to indicate that only PDP type IPv4 is allowed for the
requested Public Data Network (PDN) connectivity.
o cause #51 "PDP type IPv6 only allowed": This cause code is used by
the network to indicate that only PDP type IPv6 is allowed for the
requested PDN connectivity.
o cause #52 "single address bearers only allowed": This cause code
is used by the network to indicate that the requested PDN
connectivity is accepted with the restriction that only single IP
version bearers are allowed.
If the requested IPv4v6 PDP-Context is not supported by the network
but IPv4 and IPv6 PDP types are allowed, then the cellular host will
be configured with an IPv4 address or an IPv6 prefix by the network.
It must initiate another PDP-Context activation of the other address
family in addition to the one already activated for a given Access
Point Name (APN). The purpose of initiating a second PDP-Context is
to achieve dual-stack connectivity by means of two PDP-Contexts.
According to 3GPP specifications (TS.24302), when the UE attaches the
network using a WLAN access by means of IKEv2 capabilities [RFC7296],
there are no equivalent notification codes to inform the User
Boucadair Expires March 24, 2019 [Page 2]
Internet-Draft An Update to RFC7296 September 2018
Equipment (UE) why an IP address family is not assigned or whether
that UE should retry with another address family.
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