V6OPS Working Group D. Binet
Internet-Draft M. Boucadair
Intended status: Informational France Telecom
Expires: August 16, 2015 A. Vizdal
Deutsche Telekom AG
G. Chen
China Mobile
N. Heatley
EE
R. Chandler
eircom | meteor
February 12, 2015
An Internet Protocol Version 6 (IPv6) Profile for 3GPP Mobile Devices
draft-ietf-v6ops-mobile-device-profile-17
Abstract
This document defines a profile that is a superset of that of the
connection to IPv6 cellular networks defined in the IPv6 for Third
Generation Partnership Project (3GPP) Cellular Hosts document. This
document defines an IPv6 profile that a number of operators recommend
in order to connect 3GPP mobile devices to an IPv6-only or dual-stack
wireless network (including 3GPP cellular network and IEEE 802.11
network) with a special focus on IPv4 service continuity features.
Both hosts and devices with capability to share their WAN (Wide Area
Network) connectivity are in scope.
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 http://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 16, 2015.
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Copyright Notice
Copyright (c) 2015 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
(http://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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Connectivity Recommendations . . . . . . . . . . . . . . . . 5
2.1. WLAN Connectivity Recommendations . . . . . . . . . . . . 8
3. Advanced Recommendations . . . . . . . . . . . . . . . . . . 8
4. Recommendations for Cellular Devices with LAN Capabilities . 10
5. APIs & Applications Recommendations . . . . . . . . . . . . . 12
6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1. Normative References . . . . . . . . . . . . . . . . . . 14
9.2. Informative References . . . . . . . . . . . . . . . . . 15
1. Introduction
IPv6 deployment in 3GPP mobile networks is the only perennial
solution to the exhaustion of IPv4 addresses in those networks.
Several mobile operators have already deployed IPv6 [RFC2460] or are
in the pre-deployment phase. One of the major hurdles as perceived
by some mobile operators is the availability of non-broken IPv6
implementation in mobile devices (e.g., Section 3.3 of [OECD]).
[RFC7066] lists a set of features to be supported by cellular hosts
to connect to 3GPP mobile networks. In the light of recent IPv6
production deployments, additional features to facilitate IPv6-only
deployments while accessing IPv4-only service are to be considered.
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This document defines an IPv6 profile for mobile devices listing
specifications produced by various Standards Developing Organizations
(in particular 3GPP and IETF). The objectives of this effort are:
1. List in one single document a comprehensive list of IPv6 features
for a mobile device, including both IPv6-only and dual-stack
mobile deployment contexts. These features cover various network
types such as GPRS (General Packet Radio Service), EPC (Evolved
Packet Core) or IEEE 802.11 network.
2. Help Operators with the detailed device requirement list
preparation (to be exchanged with device suppliers). This is
also a contribution to harmonize Operators' requirements towards
device vendors.
3. Vendors to be aware of a set of features to allow for IPv6
connectivity and IPv4 service continuity (over an IPv6-only
transport).
The recommendations do not include 3GPP release details. For more
information on the 3GPP releases detail, the reader may refer to
Section 6.2 of [RFC6459].
Some of the features listed in this profile document require to
activate dedicated functions at the network side. It is out of scope
of this document to list these network-side functions.
A detailed overview of IPv6 support in 3GPP architectures is provided
in [RFC6459].
1.1. Terminology
This document makes use of the terms defined in [RFC6459]. In
addition, the following terms are used:
o "3GPP cellular host" (or cellular host for short) denotes a 3GPP
device which can be connected to 3GPP mobile networks or IEEE
802.11 networks.
o "3GPP cellular device" (or cellular device for short) refers to a
cellular host which supports the capability to share its WAN (Wide
Area Network) connectivity.
o "Cellular host" and "mobile host" are used interchangeably.
o "Cellular device" and "mobile device" are used interchangeably.
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PREFIX64 denotes an IPv6 prefix used to build IPv4-converted IPv6
addresses [RFC6052].
1.2. Scope
A 3GPP mobile network can be used to connect various user equipments
such as a mobile telephone, a CPE (Customer Premises Equipment) or a
machine-to-machine (M2M) device. Because of this diversity of
terminals, it is necessary to define a set of IPv6 functionalities
valid for any node directly connecting to a 3GPP mobile network.
This document describes these functionalities.
This document is structured to provide the generic IPv6
recommendations which are valid for all nodes, whatever their
function (e.g., host or CPE) or service (e.g., Session Initiation
Protocol (SIP, [RFC3261])) capability. The document also contains
sections covering specific functionalities for devices providing some
LAN functions (e.g., mobile CPE or broadband dongles).
The recommendations listed below are valid for both 3GPP GPRS and
3GPP EPS (Evolved Packet System) access. For EPS, PDN-Connection
term is used instead of PDP-Context.
This document identifies also some WLAN-related IPv6 recommendations.
Other non-3GPP accesses [TS.23402] are out of scope of this document.
This profile is a superset of that of the IPv6 profile for 3GPP
Cellular Hosts [RFC7066], which is in turn a superset of IPv6 Node
Requirements [RFC6434]. It targets cellular nodes, including GPRS,
EPC (Evolved Packet Core) and IEEE 802.11 networks, that require
features to ensure IPv4 service delivery over an IPv6-only transport
in addition to the base IPv6 service. Moreover, this profile covers
cellular CPEs that are used in various deployments to offer fixed-
like services. Recommendations inspired from real deployment
experiences (e.g., roaming) are included in this profile. Also, this
profile sketches recommendations for the sake of deterministic
behaviors of cellular devices when the same configuration information
is received over several channels.
For conflicting recommendations in [RFC7066] and [RFC6434] (e.g.,
Neighbor Discovery Protocol), this profile adheres to [RFC7066].
Indeed, the support of Neighbor Discovery Protocol is mandatory in
3GPP cellular environment as it is the only way to convey IPv6 prefix
towards the 3GPP cellular device. In particular, MTU (Maximum
Transmission Unit) communication via Router Advertisement must be
supported since many 3GPP networks do not have a standard MTU
setting.
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This profile uses a stronger language for the support of Prefix
Delegation compared to [RFC7066]. The main motivation is that
cellular networks are more and more perceived as an alternative to
fixed networks for home IP-based services delivery; especially with
the advent of smartphones and 3GPP data dongles. There is a need for
an efficient mechanism to assign shorter prefix than /64 to cellular
hosts so that each LAN segment can get its own /64 prefix and multi-
link subnet issues to be avoided. The support of this functionality
in both cellular and fixed networks is key for fixed-mobile
convergence.
This document is not a standard, and conformance with it is not
required in order to claim conformance with IETF standards for IPv6.
The support of the full set of features may not be required in some
deployment contexts. The authors believe that the support of a
subset of the features included in this protocol may lead to degraded
level of service in some deployment contexts.
2. Connectivity Recommendations
This section identifies the main connectivity recommendations to be
followed by a cellular host to attach to a network using IPv6. Both
dual-stack and IPv6-only deployment models are considered. IPv4
service continuity features are listed in this section because these
are critical for Operators with an IPv6-only deployment model.
C_REC#1: In order to allow each operator to select their own
strategy regarding IPv6 introduction, the cellular host
must support both IPv6 and IPv4v6 PDP-Contexts [TS.23060].
Both IPv6 and IPv4v6 PDP-Contexts must be supported. IPv4,
IPv6 or IPv4v6 PDP-Context request acceptance depends on
the cellular network configuration.
C_REC#2: The cellular host must comply with the behavior defined in
[TS.23060] [TS.23401] [TS.24008] for requesting a PDP-
Context type. In particular, the cellular host must
request by default an IPv6 PDP-Context if the cellular host
is IPv6-only and requesting an IPv4v6 PDP-Context if the
cellular host is dual-stack or when the cellular host is
not aware of connectivity types requested by devices
connected to it (e.g., cellular host with LAN capabilities
as discussed in Section 4):
* 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 in addition to
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the one already activated for a given APN (Access Point
Name).
* If the requested PDP type and subscription data 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 text above focuses on the specification part which
explains the behavior for requesting IPv6-related PDP-
Context(s). Understanding this behavior is important to
avoid having broken IPv6 implementations in cellular
devices.
C_REC#3: The cellular host must support the PCO (Protocol
Configuration Options) [TS.24008] to retrieve the IPv6
address(es) of the Recursive DNS server(s).
In-band signaling is a convenient method to inform the
cellular host about various services, including DNS
server information. It does not require any specific
protocol to be supported and it is already deployed in
IPv4 cellular networks to convey such DNS information.
C_REC#4: The cellular host must support IPv6 aware Traffic Flow
Templates (TFT) [TS.24008].
Traffic Flow Templates are employing a packet filter to
couple an IP traffic with a PDP-Context. Thus a
dedicated PDP-Context and radio resources can be
provided by the cellular network for certain IP traffic.
C_REC#5: If the cellular host receives the DNS information in
several channels for the same interface, the following
preference order must be followed:
1. PCO
2. RA
3. DHCPv6
C_REC#6: The cellular host must be able to be configured to limit
PDP type(s) for a given APN. The default mode is to allow
all supported PDP types. Note, C_REC#2 discusses the
default behavior for requesting PDP-Context type(s).
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This feature is useful to drive the behavior of the UE
to be aligned with: (1) service-specific constraints
such as the use of IPv6-only for VoLTE (Voice over LTE),
(2) network conditions with regards to the support of
specific PDP types (e.g., IPv4v6 PDP-Context is not
supported), (3) IPv4 sunset objectives, (4) subscription
data, etc.
Note, a cellular host changing its connection between an
IPv6-specific APN and an IPv4-specific APN restarts the
ongoing applications. This is a brokenness situation.
C_REC#7: Because of potential operational deficiencies to be
experienced in some roaming situations, the cellular host
must be able to be configured with a home IP profile and a
roaming IP profile. The aim of the roaming profile is to
limit the PDP type(s) requested by the cellular host when
out of the home network. Note that distinct PDP type(s)
and APN(s) can be configured for home and roaming cases.
C_REC#8: In order to ensure IPv4 service continuity in an IPv6-only
deployment context, the cellular host should support a
method to locally construct IPv4-embedded IPv6 addresses
[RFC6052]. A method to learn PREFIX64 should be supported
by the cellular host.
This solves the issue when applications use IPv4
referrals on IPv6-only access networks.
In PCP-based environments, cellular hosts should follow
[RFC7225] to learn the IPv6 Prefix used by an upstream
PCP-controlled NAT64 device. If PCP is not enabled, the
cellular host should implement the method specified in
[RFC7050] to retrieve the PREFIX64.
C_REC#9: In order to ensure IPv4 service continuity in an IPv6-only
deployment context, the cellular host should implement the
Customer Side Translator (CLAT, [RFC6877]) function which
is compliant with [RFC6052][RFC6145][RFC6146].
CLAT function in the cellular host allows for IPv4-only
application and IPv4-referals to work on an IPv6-only
connectivity. CLAT function requires a NAT64 capability
[RFC6146] in the core network.
The IPv4 Service Continuity Prefix used by CLAT is
defined in [RFC7335].
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2.1. WLAN Connectivity Recommendations
It is increasingly common for cellular hosts have a WLAN interface in
addition to their cellular interface. These hosts are likely to be
connected to private or public hotspots. Below are listed some
generic recommendations:
W_REC#1: IPv6 must be supported on the WLAN interface. In
particular, WLAN interface must behave properly when only
an IPv6 connectivity is provided.
Some tests revealed that IPv4 configuration is required
to enable IPv6-only connectivity. Indeed, some cellular
handsets can access a WLAN IPv6-only network by
configuring first a static IPv4 address. Once the
device is connected to the network and the wlan0
interface got an IPv6 global address, the IPv4 address
can be deleted from the configuration. This avoids the
device to ask automatically for a DHCPv4 server, and
allows to connect to IPv6-only networks. Failing to
configure an IPv4 address on the interface must not
prohibit using IPv6 on the same interface.
W_REC#2: If the device receives the DNS information in several
channels for the same interface, the following preference
order must be followed:
1. RA
2. DHCPv6
3. Advanced Recommendations
This section identifies a set of advanced recommendations to fulfill
requirements of critical services such as VoLTE.
A_REC#1: The cellular host must support ROHC RTP Profile (0x0001)
and ROHC UDP Profile (0x0002) for IPv6 ([RFC5795]). Other
ROHC profiles may be supported.
Bandwidth in cellular networks must be optimized as much
as possible. ROHC provides a solution to reduce
bandwidth consumption and to reduce the impact of having
bigger packet headers in IPv6 compared to IPv4.
"RTP/UDP/IP" ROHC profile (0x0001) to compress RTP
packets and "UDP/IP" ROHC profile (0x0002) to compress
RTCP packets are required for Voice over LTE (VoLTE) by
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IR.92.4.0 section 4.1 [IR92]. Note, [IR92] indicates
also the host must be able to apply the compression to
packets that are carried over the radio bearer dedicated
for the voice media.
A_REC#2: The cellular host should support PCP [RFC6887].
The support of PCP is seen as a driver to save battery
consumption exacerbated by keepalive messages. PCP also
gives the possibility of enabling incoming connections
to the cellular device. Indeed, because several
stateful devices may be deployed in wireless networks
(e.g., NAT and/or Firewalls), PCP can be used by the
cellular host to control network-based NAT and Firewall
functions which will reduce per-application signaling
and save battery consumption.
According to [Power], the consumption of a cellular
device with a keep-alive interval equal to 20 seconds
(that is the default value in [RFC3948] for example) is
29 mA (2G)/34 mA (3G). This consumption is reduced to
16 mA (2G)/24 mA (3G) when the interval is increased to
40 seconds, to 9.1 mA (2G)/16 mA (3G) if the interval is
equal to 150 seconds, and to 7.3 mA (2G)/14 mA (3G) if
the interval is equal to 180 seconds. When no keep-
alive is issued, the consumption would be 5.2 mA
(2G)/6.1 mA (3G). The impact of keepalive messages
would be more severe if multiple applications are
issuing those messages (e.g., SIP, IPsec, etc.).
A_REC#3: In order for host-based validation of DNS Security
Extensions (DNSSEC) to continue to function in an IPv6-only
with NAT64 deployment context, the cellular host should
embed a DNS64 function ([RFC6147]).
This is called "DNS64 in stub-resolver mode" in
[RFC6147].
As discussed in Section 5.5 of [RFC6147], a security-
aware and validating host has to perform the DNS64
function locally.
Because synthetic AAAA records cannot be successfully
validated in a host, learning the PREFIX64 used to
construct IPv4-converted IPv6 addresses allows the use
of DNSSEC [RFC4033] [RFC4034], [RFC4035]. Means to
configure or discover a PREFIX64 are required on the
cellular device as discussed in C_REC#8.
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[RFC7051] discusses why a security-aware and validating
host has to perform the DNS64 function locally and why
it has to be able to learn the proper PREFIX64(s).
A_REC#4: When the cellular host is dual-stack connected (i.e.,
configured with an IPv4 address and IPv6 prefix), it should
support means to prefer native IPv6 connection over
connection established through translation devices (e.g.,
NAT44 and NAT64).
When both IPv4 and IPv6 DNS servers are configured, a
dual-stack host must contact first its IPv6 DNS server.
Cellular hosts should follow the procedure specified in
[RFC6724] for source address selection.
4. Recommendations for Cellular Devices with LAN Capabilities
This section focuses on cellular devices (e.g., CPE, smartphones, or
dongles with tethering features) which provide IP connectivity to
other devices connected to them. In such case, all connected devices
are sharing the same 2G, 3G or LTE connection. In addition to the
generic recommendations listed in Section 2, these cellular devices
have to meet the recommendations listed below.
L_REC#1: The cellular device must support Prefix Delegation
capabilities [RFC3633] and must support Prefix Exclude
Option for DHCPv6-based Prefix Delegation as defined in
[RFC6603]. Particularly, it must behave as a Requesting
Router.
Cellular networks are more and more perceived as an
alternative to fixed networks for home IP-based services
delivery; especially with the advent of smartphones and
3GPP data dongles. There is a need for an efficient
mechanism to assign shorter prefix than /64 to cellular
hosts so that each LAN segment can get its own /64
prefix and multi-link subnet issues to be avoided.
In case a prefix is delegated to a cellular host using
DHCPv6, the cellular device will be configured with two
prefixes:
(1) one for 3GPP link allocated using SLAAC mechanism
and
(2) another one delegated for LANs acquired during
Prefix Delegation operation.
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Note that the 3GPP network architecture requires both
the WAN (Wide Area Network) and the delegated prefix to
be aggregatable, so the subscriber can be identified
using a single prefix.
Without the Prefix Exclude Option, the delegating router
(GGSN/PGW) will have to ensure [RFC3633] compliancy
(e.g., halving the delegated prefix and assigning the
WAN prefix out of the 1st half and the prefix to be
delegated to the terminal from the 2nd half).
Because Prefix Delegation capabilities may not be
available in some attached networks, L_REC#3 is strongly
recommended to accommodate early deployments.
L_REC#2: The cellular CPE must be compliant with the requirements
specified in [RFC7084].
There are several deployments, particularly in emerging
countries, that relies on mobile networks to provide
broadband services (e.g., customers are provided with
mobile CPEs).
Note, this profile does not require IPv4 service
continuity techniques listed in [RFC7084] because those
are specific to fixed networks. IPv4 service continuity
techniques specific to the mobile networks are included
in this profile.
CAUTION: This recommendation does not apply to any
cellular device with LAN capabilities; it is specific to
cellular CPEs in order to ensure the same IPv6
functional parity for both fixed and cellular CPEs.
L_REC#3: For deployments requiring to share the same /64 prefix, the
cellular device should support [RFC7278] to enable sharing
a /64 prefix between the 3GPP interface towards the GGSN/
PGW (WAN interface) and the LAN interfaces.
Prefix Delegation (refer to L_REC#1) is the target
solution for distributing prefixes in the LAN side but,
because the device may attach to earlier 3GPP release
networks, a mean to share a /64 prefix is also
recommended [RFC7278].
[RFC7278] must be invoked only if Prefix Delegation is
not in use.
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L_REC#4: In order to ensure IPv4 service continuity in an IPv6-only
deployment context, the cellular device should support the
Customer Side Translator (CLAT) [RFC6877].
Various IP devices are likely to be connected to
cellular device, acting as a CPE. Some of these devices
can be dual-stack, others are IPv6-only or IPv4-only.
IPv6-only connectivity for cellular device does not
allow IPv4-only sessions to be established for hosts
connected on the LAN segment of cellular devices.
In order to allow IPv4 sessions establishment initiated
from devices located on LAN segment side and target IPv4
nodes, a solution consists in integrating the CLAT
function in the cellular device. As elaborated in
Section 2, the CLAT function allows also IPv4
applications to continue running over an IPv6-only host.
The IPv4 Service Continuity Prefix used by CLAT is
defined in [RFC7335].
L_REC#5: If a RA MTU is advertised from the 3GPP network, the
cellular device should relay that upstream MTU information
to the downstream attached LAN devices in RA.
Receiving and relaying RA MTU values facilitates a more
harmonious functioning of the mobile core network where
end nodes transmit packets that do not exceed the MTU
size of the mobile network's GTP tunnels.
[TS.23060] indicates providing a link MTU value of 1358
octets to the 3GPP cellular device will prevent the IP
layer fragmentation within the transport network between
the cellular device and the GGSN/PGW.
5. APIs & Applications Recommendations
The use of address family dependent APIs (Application Programming
Interfaces) or hard-coded IPv4 address literals may lead to broken
applications when IPv6 connectivity is in use. This section
identifies a set of recommendations aiming to minimize broken
applications when the cellular device is attached to an IPv6 network.
APP_REC#1: Name resolution libraries must support both IPv4 and
IPv6.
In particular, the cellular host must support
[RFC3596].
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APP_REC#2: Applications provided by the mobile device vendor must be
independent of the underlying IP address family.
This means applications must be IP version agnostic.
APP_REC#3: Applications provided by the mobile device vendor that
use Uniform Resource Identifiers (URIs) must follow
[RFC3986] and its updates. For example, SIP applications
must follow the correction defined in [RFC5954].
6. Security Considerations
The security considerations identified in [RFC7066] and [RFC6459] are
to be taken into account.
In the case of cellular CPEs, compliance with L_REC#2 entails
compliance with [RFC7084], which in turn recommends compliance with
Recommended Simple Security Capabilities in Customer Premises
Equipment (CPE) for Providing Residential IPv6 Internet Service
[RFC6092]. Therefore, the security considerations in Section 6 of
[RFC6092] are relevant. In particular, it bears repeating here that
the true impact of stateful filtering may be a reduction in security,
and that IETF make no statement, expressed or implied, as to whether
using the capabilities described in any of these documents ultimately
improves security for any individual users or for the Internet
community as a whole.
The cellular host must be able to generate IPv6 addresses which
preserve privacy. The activation of privacy extension (e.g., using
[RFC7217]) makes it more difficult to track a host over time when
compared to using a permanent Interface Identifier. Tracking a host
is still possible based on the first 64 bits of the IPv6 address.
Means to prevent against such tracking issues may be enabled in the
network side. Note, privacy extensions are required by regulatory
bodies in some countries.
Host-based validation of DNSSEC is discussed in A_REC#3 (see
Section 3).
7. IANA Considerations
This document does not require any action from IANA.
8. Acknowledgements
Many thanks to C. Byrne, H. Soliman, H. Singh, L. Colliti, T.
Lemon, B. Sarikaya, M. Mawatari, M. Abrahamsson, P. Vickers, V.
Kuarsingh, E. Kline, S. Josefsson, A. Baryun, J. Woodyatt, T.
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Kossut, B. Stark, and A. Petrescu for the discussion in the v6ops
mailing list.
Thanks to A. Farrel, B. Haberman and K. Moriarty for the comments
during the IESG review.
Special thanks to T. Savolainen, J. Korhonen, J. Jaeggli, and F.
Baker for their detailed reviews and comments.
9. References
9.1. Normative References
[IR92] GSMA, "IR.92.V4.0 - IMS Profile for Voice and SMS", March
2011, <http://www.gsma.com/newsroom/
ir-92-v4-0-ims-profile-for-voice-and-sms>.
[RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6
(IPv6) Specification", RFC 2460, December 1998.
[RFC3596] Thomson, S., Huitema, C., Ksinant, V., and M. Souissi,
"DNS Extensions to Support IP Version 6", RFC 3596,
October 2003.
[RFC3633] Troan, O. and R. Droms, "IPv6 Prefix Options for Dynamic
Host Configuration Protocol (DHCP) version 6", RFC 3633,
December 2003.
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66, RFC
3986, January 2005.
[RFC5795] Sandlund, K., Pelletier, G., and L-E. Jonsson, "The RObust
Header Compression (ROHC) Framework", RFC 5795, March
2010.
[RFC5954] Gurbani, V., Carpenter, B., and B. Tate, "Essential
Correction for IPv6 ABNF and URI Comparison in RFC 3261",
RFC 5954, August 2010.
[RFC6052] Bao, C., Huitema, C., Bagnulo, M., Boucadair, M., and X.
Li, "IPv6 Addressing of IPv4/IPv6 Translators", RFC 6052,
October 2010.
[RFC6603] Korhonen, J., Savolainen, T., Krishnan, S., and O. Troan,
"Prefix Exclude Option for DHCPv6-based Prefix
Delegation", RFC 6603, May 2012.
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[RFC7066] Korhonen, J., Arkko, J., Savolainen, T., and S. Krishnan,
"IPv6 for Third Generation Partnership Project (3GPP)
Cellular Hosts", RFC 7066, November 2013.
[TS.23060]
3GPP, "General Packet Radio Service (GPRS); Service
description; Stage 2", September 2011,
<http://www.3gpp.org/DynaReport/23060.htm>.
[TS.23401]
3GPP, "General Packet Radio Service (GPRS) enhancements
for Evolved Universal Terrestrial Radio Access Network
(E-UTRAN) access", September 2011,
<http://www.3gpp.org/DynaReport/23401.htm>.
[TS.24008]
3GPP, "Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3", June 2011,
<http://www.3gpp.org/DynaReport/24008.htm>.
9.2. Informative References
[OECD] Organisation for Economic Cooperation and Development
(OECD), "The Economics of the Transition to Internet
Protocol version 6 (IPv6)", November 2014, <http://www.oec
d.org/officialdocuments/publicdisplaydocumentpdf/?cote=DST
I/ICCP/CISP%282014%293/FINAL&docLanguage=En>.
[Power] Haverinen, H., Siren, J., and P. Eronen, "Energy
Consumption of Always-On Applications in WCDMA Networks",
April 2007, <http://ieeexplore.ieee.org/xpl/
articleDetails.jsp?arnumber=4212635>.
[RFC3261] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
A., Peterson, J., Sparks, R., Handley, M., and E.
Schooler, "SIP: Session Initiation Protocol", RFC 3261,
June 2002.
[RFC3948] Huttunen, A., Swander, B., Volpe, V., DiBurro, L., and M.
Stenberg, "UDP Encapsulation of IPsec ESP Packets", RFC
3948, January 2005.
[RFC4033] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "DNS Security Introduction and Requirements", RFC
4033, March 2005.
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[RFC4034] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Resource Records for the DNS Security Extensions",
RFC 4034, March 2005.
[RFC4035] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Protocol Modifications for the DNS Security
Extensions", RFC 4035, March 2005.
[RFC6092] Woodyatt, J., "Recommended Simple Security Capabilities in
Customer Premises Equipment (CPE) for Providing
Residential IPv6 Internet Service", RFC 6092, January
2011.
[RFC6145] Li, X., Bao, C., and F. Baker, "IP/ICMP Translation
Algorithm", RFC 6145, April 2011.
[RFC6146] Bagnulo, M., Matthews, P., and I. van Beijnum, "Stateful
NAT64: Network Address and Protocol Translation from IPv6
Clients to IPv4 Servers", RFC 6146, April 2011.
[RFC6147] Bagnulo, M., Sullivan, A., Matthews, P., and I. van
Beijnum, "DNS64: DNS Extensions for Network Address
Translation from IPv6 Clients to IPv4 Servers", RFC 6147,
April 2011.
[RFC6434] Jankiewicz, E., Loughney, J., and T. Narten, "IPv6 Node
Requirements", RFC 6434, December 2011.
[RFC6459] Korhonen, J., Soininen, J., Patil, B., Savolainen, T.,
Bajko, G., and K. Iisakkila, "IPv6 in 3rd Generation
Partnership Project (3GPP) Evolved Packet System (EPS)",
RFC 6459, January 2012.
[RFC6724] Thaler, D., Draves, R., Matsumoto, A., and T. Chown,
"Default Address Selection for Internet Protocol Version 6
(IPv6)", RFC 6724, September 2012.
[RFC6877] Mawatari, M., Kawashima, M., and C. Byrne, "464XLAT:
Combination of Stateful and Stateless Translation", RFC
6877, April 2013.
[RFC6887] Wing, D., Cheshire, S., Boucadair, M., Penno, R., and P.
Selkirk, "Port Control Protocol (PCP)", RFC 6887, April
2013.
[RFC7050] Savolainen, T., Korhonen, J., and D. Wing, "Discovery of
the IPv6 Prefix Used for IPv6 Address Synthesis", RFC
7050, November 2013.
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[RFC7051] Korhonen, J. and T. Savolainen, "Analysis of Solution
Proposals for Hosts to Learn NAT64 Prefix", RFC 7051,
November 2013.
[RFC7084] Singh, H., Beebee, W., Donley, C., and B. Stark, "Basic
Requirements for IPv6 Customer Edge Routers", RFC 7084,
November 2013.
[RFC7217] Gont, F., "A Method for Generating Semantically Opaque
Interface Identifiers with IPv6 Stateless Address
Autoconfiguration (SLAAC)", RFC 7217, April 2014.
[RFC7225] Boucadair, M., "Discovering NAT64 IPv6 Prefixes Using the
Port Control Protocol (PCP)", RFC 7225, May 2014.
[RFC7278] Byrne, C., Drown, D., and A. Vizdal, "Extending an IPv6
/64 Prefix from a Third Generation Partnership Project
(3GPP) Mobile Interface to a LAN Link", RFC 7278, June
2014.
[RFC7335] Byrne, C., "IPv4 Service Continuity Prefix", RFC 7335,
August 2014.
[TS.23402]
3GPP, "Architecture enhancements for non-3GPP accesses",
September 2011,
<http://www.3gpp.org/DynaReport/23402.htm>.
Authors' Addresses
David Binet
France Telecom
Rennes
France
EMail: david.binet@orange.com
Mohamed Boucadair
France Telecom
Rennes 35000
France
EMail: mohamed.boucadair@orange.com
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Ales Vizdal
Deutsche Telekom AG
EMail: ales.vizdal@t-mobile.cz
Gang Chen
China Mobile
EMail: phdgang@gmail.com
Nick Heatley
EE
The Point, 37 North Wharf Road,
London W2 1AG
U.K
EMail: nick.heatley@ee.co.uk
Ross Chandler
eircom | meteor
1HSQ
St. John's Road
Dublin 8
Ireland
EMail: ross@eircom.net
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