draft-ietf-dime-4over6-provisioning-06.txt   rfc7678.txt 
Internet Engineering Task Force C. Zhou Internet Engineering Task Force (IETF) C. Zhou
Internet-Draft Huawei Technologies Request for Comments: 7678 Huawei Technologies
Intended status: Standards Track T. Taylor Category: Standards Track T. Taylor
Expires: February 7, 2016 PT Taylor Consulting ISSN: 2070-1721 PT Taylor Consulting
Q. Sun Q. Sun
China Telecom China Telecom
M. Boucadair M. Boucadair
France Telecom France Telecom
August 6, 2015 October 2015
Attribute-Value Pairs For Provisioning Customer Equipment Supporting Attribute-Value Pairs for Provisioning Customer Equipment Supporting
IPv4-Over-IPv6 Transitional Solutions IPv4-Over-IPv6 Transitional Solutions
draft-ietf-dime-4over6-provisioning-06
Abstract Abstract
During the transition from IPv4 to IPv6, customer equipment may have During the transition from IPv4 to IPv6, customer equipment may have
to support one of the various transition methods that have been to support one of the various transition methods that have been
defined for carrying IPv4 packets over IPv6. This document defined for carrying IPv4 packets over IPv6. This document
enumerates the information that needs to be provisioned on a customer enumerates the information that needs to be provisioned on a customer
edge router to support a list of transition techniques based on edge router to support a list of transition techniques based on
tunneling IPv4 in IPv6, with a view to defining reusable components tunneling IPv4 in IPv6, with a view to defining reusable components
for a reasonable transition path between these techniques. To the for a reasonable transition path between these techniques. To the
extent that the provisioning is done dynamically, AAA support is extent that the provisioning is done dynamically, Authentication,
needed to provide the information to the network server responsible Authorization, and Accounting (AAA) support is needed to provide the
for passing the information to the customer equipment. This document information to the network server responsible for passing the
specifies Diameter (RFC 6733) attribute-value pairs to be used for information to the customer equipment. This document specifies
that purpose. Diameter (RFC 6733) Attribute-Value Pairs (AVPs) to be used for that
purpose.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This is an Internet Standards Track document.
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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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 This document is a product of the Internet Engineering Task Force
and may be updated, replaced, or obsoleted by other documents at any (IETF). It represents the consensus of the IETF community. It has
time. It is inappropriate to use Internet-Drafts as reference received public review and has been approved for publication by the
material or to cite them other than as "work in progress." Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
This Internet-Draft will expire on February 7, 2016. Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7678.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
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described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 5
2. Description of the Parameters Required By Each Transition 2. Description of the Parameters Required by Each Transition
Method . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Method . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Parameters For Dual-Stack Lite (DS-Lite) . . . . . . . . 5 2.1. Parameters for Dual-Stack Lite (DS-Lite) . . . . . . . . 6
2.2. Lightweight 4over6 (lw4o6) . . . . . . . . . . . . . . . 5 2.2. Lightweight 4over6 (lw4o6) . . . . . . . . . . . . . . . 6
2.3. Port Set Specification . . . . . . . . . . . . . . . . . 6 2.3. Port Set Specification . . . . . . . . . . . . . . . . . 7
2.4. Mapping of Address and Port with Encapsulation (MAP-E) . 6 2.4. Mapping of Address and Port with Encapsulation (MAP-E) . 7
2.5. Parameters For Multicast . . . . . . . . . . . . . . . . 7 2.5. Parameters for Multicast . . . . . . . . . . . . . . . . 8
2.6. Summary and Discussion . . . . . . . . . . . . . . . . . 8 2.6. Summary and Discussion . . . . . . . . . . . . . . . . . 9
3. Attribute-Value Pair Definitions . . . . . . . . . . . . . . 8 3. Attribute-Value Pair Definitions . . . . . . . . . . . . . . 9
3.1. IP-Prefix-Length AVP . . . . . . . . . . . . . . . . . . 8 3.1. IP-Prefix-Length AVP . . . . . . . . . . . . . . . . . . 10
3.2. Border-Router-Name AVP . . . . . . . . . . . . . . . . . 9 3.2. Border-Router-Name AVP . . . . . . . . . . . . . . . . . 10
3.3. 64-Multicast-Attributes AVP . . . . . . . . . . . . . . . 9 3.3. 64-Multicast-Attributes AVP . . . . . . . . . . . . . . . 10
3.3.1. ASM-mPrefix64 AVP . . . . . . . . . . . . . . . . . . 9 3.3.1. ASM-mPrefix64 AVP . . . . . . . . . . . . . . . . . . 11
3.3.2. SSM-mPrefix64 AVP . . . . . . . . . . . . . . . . . . 10 3.3.2. SSM-mPrefix64 AVP . . . . . . . . . . . . . . . . . . 11
3.3.3. Delegated-IPv6-Prefix AVP As uPrefix64 . . . . . . . 10 3.3.3. Delegated-IPv6-Prefix AVP as uPrefix64 . . . . . . . 12
3.4. Tunnel-Source-Pref-Or-Addr AVP . . . . . . . . . . . . . 11 3.4. Tunnel-Source-Pref-Or-Addr AVP . . . . . . . . . . . . . 12
3.4.1. Delegated-IPv6-Prefix As the IPv6 Binding Prefix . . 11 3.4.1. Delegated-IPv6-Prefix as the IPv6 Binding Prefix . . 12
3.4.2. Tunnel-Source-IPv6-Address AVP . . . . . . . . . . . 11 3.4.2. Tunnel-Source-IPv6-Address AVP . . . . . . . . . . . 12
3.5. Port-Set-Identifier . . . . . . . . . . . . . . . . . . . 11 3.5. Port-Set-Identifier . . . . . . . . . . . . . . . . . . . 13
3.6. Lw4o6-Binding AVP . . . . . . . . . . . . . . . . . . . . 12 3.6. Lw4o6-Binding AVP . . . . . . . . . . . . . . . . . . . . 13
3.6.1. Lw4o6-External-IPv4-Addr AVP . . . . . . . . . . . . 13 3.6.1. Lw4o6-External-IPv4-Addr AVP . . . . . . . . . . . . 14
3.7. MAP-E-Attributes . . . . . . . . . . . . . . . . . . . . 13 3.7. MAP-E-Attributes . . . . . . . . . . . . . . . . . . . . 14
3.8. MAP-Mesh-Mode . . . . . . . . . . . . . . . . . . . . . . 14 3.8. MAP-Mesh-Mode . . . . . . . . . . . . . . . . . . . . . . 15
3.9. MAP-Mapping-Rule . . . . . . . . . . . . . . . . . . . . 14 3.9. MAP-Mapping-Rule . . . . . . . . . . . . . . . . . . . . 15
3.9.1. Rule-IPv4-Addr-Or-Prefix AVP . . . . . . . . . . . . 15 3.9.1. Rule-IPv4-Addr-Or-Prefix AVP . . . . . . . . . . . . 16
3.9.2. Rule-IPv6-Prefix AVP . . . . . . . . . . . . . . . . 15 3.9.2. Rule-IPv6-Prefix AVP . . . . . . . . . . . . . . . . 16
3.9.3. EA-Field-Length AVP . . . . . . . . . . . . . . . . . 16 3.9.3. EA-Field-Length AVP . . . . . . . . . . . . . . . . . 17
4. Attribute Value Pair Flag Rules . . . . . . . . . . . . . . . 16 4. Attribute-Value Pair Flag Rules . . . . . . . . . . . . . . . 18
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
6. Security Considerations . . . . . . . . . . . . . . . . . . . 18 6. Security Considerations . . . . . . . . . . . . . . . . . . . 19
6.1. Man-In-The-Middle (MITM) Attacks . . . . . . . . . . . . 18 6.1. Man-In-The-Middle (MITM) Attacks . . . . . . . . . . . . 19
6.2. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.2. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 19 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 20
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.1. Normative References . . . . . . . . . . . . . . . . . . 20
8.1. Normative References . . . . . . . . . . . . . . . . . . 19 7.2. Informative References . . . . . . . . . . . . . . . . . 21
8.2. Informative References . . . . . . . . . . . . . . . . . 20 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 22
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 23
1. Introduction 1. Introduction
A number of transition techniques have been defined to allow IPv4 A number of transition techniques have been defined to allow IPv4
packets to pass between hosts and IPv4 networks over an intervening packets to pass between hosts and IPv4 networks over an intervening
IPv6 network while minimizing the number of public IPv4 addresses IPv6 network while minimizing the number of public IPv4 addresses
that need to be consumed by the hosts. Different operators will that need to be consumed by the hosts. Different operators will
deploy different technologies, and sometimes one operator will use deploy different technologies, and sometimes one operator will use
more than one technology, depending on what is supported by the more than one technology depending on what is supported by the
available equipment and upon other factors both technical and available equipment and upon other factors both technical and
economic. economic.
Each technique requires the provisioning of some subscriber-specific Each technique requires the provisioning of some subscriber-specific
information on the customer edge device. The provisioning may be by information on the customer edge device. The provisioning may be by
DHCPv6 [RFC3315] or by some other method. This document is DHCPv6 [RFC3315] or by some other method. This document is
indifferent to the specific provisioning technique used, but assumes indifferent to the specific provisioning technique used but assumes a
a deployment in which that information is managed by AAA deployment in which that information is managed by AAA
(Authentication, Authorization, and Accounting) servers. It further (Authentication, Authorization, and Accounting) servers. It further
assumes that this information is delivered to intermediate network assumes that this information is delivered to intermediate network
nodes for onward provisioning using the Diameter protocol [RFC6733]. nodes for onward provisioning using the Diameter protocol [RFC6733].
As described below, in the particular case where the Lightweight As described below, in the particular case where the Lightweight
4over6 (lw4o6) [RFC7596] transition method has been deployed, per- 4over6 (lw4o6) [RFC7596] transition method has been deployed, per-
subscriber-site information almost identical to that passed to the subscriber-site information almost identical to that passed to the
subscriber site [RFC7598] also needs to be delivered to the border subscriber site [RFC7598] also needs to be delivered to the border
router serving that site. The Diameter protocol may be used for this router serving that site. The Diameter protocol may be used for this
purpose too. purpose too.
This document analyzes the information required to configure the This document analyzes the information required to configure the
customer edge equipment for the following set of transition methods: customer edge equipment for the following set of transition methods:
o Dual-Stack Lite (DS-Lite) [RFC6333], o Dual-Stack Lite (DS-Lite) [RFC6333],
o Lightweight 4over6 (lw4o6) [RFC7596], and o Lightweight 4over6 (lw4o6) [RFC7596], and
o Mapping of Address and Port with Encapsulation (MAP-E) [RFC7597]. o Mapping of Address and Port with Encapsulation (MAP-E) [RFC7597].
[I-D.ietf-softwire-dslite-multicast] specifies a generic solution for [DSLITE-MULTICAST] specifies a generic solution for delivery of IPv4
delivery of IPv4 multicast services to IPv4 clients over an IPv6 multicast services to IPv4 clients over an IPv6 multicast network.
multicast network. The solution was developed with DS-Lite in mind The solution was developed with DS-Lite in mind but it is not limited
but it is however not limited to DS-Lite. As such, it applies also to DS-Lite. As such, it applies also for lw4o6 and MAP-E. This
for lw4o6 and MAP-E. This document analyzes the information required document analyzes the information required to configure the customer
to configure the customer edge equipment for the support of multicast edge equipment for the support of multicast in the context of DS-
in the context of DS-Lite, MAP-E, and Lightweight 4over6 in Lite, MAP-E, and lw4o6 in particular.
particular.
On the basis of those analyses it specifies a number of attribute- On the basis of those analyses, it specifies a number of Attribute-
value pairs (AVPs) to allow the necessary subscriber-site-specific Value Pairs (AVPs) to allow the necessary subscriber-site-specific
configuration information to be carried in Diameter. configuration information to be carried in Diameter.
This document doesn't specify any new commands or Application-Ids. This document doesn't specify any new commands or Application IDs.
The specified AVPs could be used for any Diameter application The specified AVPs could be used for any Diameter application
suitable for provisioning. suitable for provisioning.
1.1. Requirements Language 1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
The abbreviation "CE" denotes the equipment at the customer edge that The abbreviation CPE stands for Customer Premise Equipment. It
terminates the customer end of an IPv6 transitional tunnel. This denotes the equipment at the customer edge that terminates the
will usually be a router, but could be a host directly connected to customer end of an IPv6 transitional tunnel. This will usually be a
the network. router but could be a host directly connected to the network. In
some documents (e.g., [RFC7597]), this functional entity is called CE
(Customer Edge).
The term "tunnel source address" is used to denote the IPv6 source The term "tunnel source address" is used to denote the IPv6 source
address used in the outer header of packets sent from the CE through address used in the outer header of packets sent from the CPE through
an lw4o6 transitional tunnel to the border router. an lw4o6 transitional tunnel to the border router.
2. Description of the Parameters Required By Each Transition Method 2. Description of the Parameters Required by Each Transition Method
This section reviews the parameters that need to be provisioned for This section reviews the parameters that need to be provisioned for
each of the transition methods listed above. This enumeration each of the transition methods listed above. This enumeration
provides the justification for the AVPs defined in the next section. provides the justification for the AVPs defined in the next section.
A means is required to indicate which transition method(s) a given A means is required to indicate which transition method(s) a given
subscriber wants to use. The approach taken in this document is to subscriber wants to use. The approach taken in this document is to
specify Grouped AVPs specific to lw4o6 and MAP-E. The operator can specify Grouped AVPs specific to lw4o6 and MAP-E. The operator can
control which of these two transition methods a given subscriber uses control which of these two transition methods a given subscriber uses
by ensuring that AAA passes only the Grouped AVP relevant to that by ensuring that AAA passes only the Grouped AVP relevant to that
method. A Grouped AVP is unnecessary for Dual-Stack Lite, since AAA method. A Grouped AVP is unnecessary for DS-Lite since AAA has only
has only to provide the Fully Qualified Domain Name (FQDN) of the DS- to provide the Fully Qualified Domain Name (FQDN) of the DS-Lite
Lite Address Family Transition Router (AFTR) (see Section 2.1). Address Family Transition Router (AFTR) (see Section 2.1). Hence,
Hence when no Grouped AVP is provided either for lw4o6 or MAP-E and when no Grouped AVP is provided either for lw4o6 or MAP-E and only
only the AFTR's FQDN is present, this indicates that the subscriber the AFTR's FQDN is present, this indicates that the subscriber
equipment will use the Dual-Stack Lite transition method. equipment will use the DS-Lite transition method. Provisioning of
Provisioning of multicast is an orthogonal activity, since it is multicast is an orthogonal activity since it is independent of the
independent of the transition method. transition method.
2.1. Parameters For Dual-Stack Lite (DS-Lite) 2.1. Parameters for Dual-Stack Lite (DS-Lite)
DS-Lite is documented in [RFC6333]. The Basic Bridging BroadBand DS-Lite is documented in [RFC6333]. The Basic Bridging BroadBand
(B4) element at the customer premises needs to discover the IPv6 (B4) element at the customer premises needs to discover the IPv6
address of the AFTR (border router). For the reasons discussed in address of the AFTR (border router). For the reasons discussed in
Section 3.2, the AAA server provisions the B4 element with the AFTR's Section 3.2, the AAA server provisions the B4 element with the AFTR's
Fully Qualified Domain Name (FQDN) that is passed to a B4's IP FQDN that is passed to a B4's IP resolution library. The AFTR's FQDN
resolution library. The AFTR's FQDN is contained in the Border- is contained in the Border-Router-Name AVP (see Section 3.2).
Router-Name AVP (see Section 3.2).
The B4 element could also be configured with the IPv4 address of the The B4 element could also be configured with the IPv4 address of the
B4 interface facing the tunnel, with valid values from 192.0.0.2 to B4 interface facing the tunnel, with valid values from 192.0.0.2 to
192.0.0.7 and the default value of 192.0.0.2 in the absence of 192.0.0.7 and the default value of 192.0.0.2 in the absence of
provisioning. Provisioning such information through AAA is provisioning. Provisioning such information through AAA is
problematic because it is most likely used in a case where multiple problematic because it is most likely used in a case where multiple
B4 instances occupy the same device. This document therefore assumes B4 instances occupy the same device. This document therefore assumes
that the B4 interface address is determined by other means than AAA that the B4 interface address is determined by other means than AAA
(implementation-dependent or static assignment). (implementation dependent or static assignment).
2.2. Lightweight 4over6 (lw4o6) 2.2. Lightweight 4over6 (lw4o6)
Lightweight 4over6 (lw4o6) is documented in [RFC7596]. Lw4o6 Lightweight 4over6 (lw4o6) is documented in [RFC7596]. Lw4o6
requires four items to be provisioned to the customer equipment: requires four items to be provisioned to the customer equipment:
o IPv6 address of the border router. o an IPv6 address of the border router.
o IPv6 prefix used by the CE to construct the tunnel source address. o an IPv6 prefix used by the CPE to construct the tunnel source
In the terminology of [RFC7596], this is the IPv6 Binding Prefix. address. In the terminology of [RFC7596], this is the IPv6
Binding Prefix.
o an IPv4 address to be used on the external side of the CE; and o an IPv4 address to be used on the external side of the CPE.
o if the IPv4 address is shared, a specification of the port set the o if the IPv4 address is shared, a specification of the port set the
subscriber site is allowed to use. Please see the description in subscriber site is allowed to use. Please see the description in
Section 2.3. For lw4o6, all three of the parameters 'a', 'k', and Section 2.3. For lw4o6, all three of the parameters 'a', 'k', and
PSID described in that section are required. The default value of the Port Set Identifier (PSID) described in that section are
the offset parameter 'a' is 0. required. The default value of the offset parameter 'a' is 0.
As discussed in Section 4 of [RFC7596], it is necessary to As discussed in Section 4 of [RFC7596], it is necessary to
synchronize this configuration with corresponding per-subscriber synchronize this configuration with corresponding per-subscriber
configuration at the border router. The border router information configuration at the border router. The border router information
consists of the same public IPv4 address and port set parameters that consists of the same public IPv4 address and port set parameters that
are passed to the CE, bound together with the full /128 IPv6 address are passed to the CPE, bound together with the full /128 IPv6 address
(not just the Binding Prefix) configured as the tunnel source address (not just the Binding Prefix) configured as the tunnel source address
at the CE. at the CPE.
2.3. Port Set Specification 2.3. Port Set Specification
When an external IPv4 address is shared, lw4o6 and MAP-E restrict the When an external IPv4 address is shared, lw4o6 and MAP-E restrict the
CE to use of a subset of all available ports on the external side. CPE to use of a subset of all available ports on the external side.
Both transition methods use the algorithm defined in Appendix B of Both transition methods use the algorithm defined in Appendix B of
[RFC7597] to derive the values of the port numbers in the port set. [RFC7597] to derive the values of the port numbers in the port set.
This algorithm features three parameters, describing the positioning This algorithm features three parameters, describing the positioning
and value of the Port Set Identifier (PSID) within each port number and value of the PSID within each port number of the generated set:
of the generated set:
o an offset 'a' from the beginning of the port number to the first o an offset 'a' from the beginning of the port number to the first
bit of the PSID; bit of the PSID;
o the length 'k' of the PSID within the port number, in bits; and o the length 'k' of the PSID within the port number, in bits; and
o the value of the PSID itself. o the value of the PSID itself.
2.4. Mapping of Address and Port with Encapsulation (MAP-E) 2.4. Mapping of Address and Port with Encapsulation (MAP-E)
Mapping of Address and Port with Encapsulation (MAP-E) is described Mapping of Address and Port with Encapsulation (MAP-E) is described
in [RFC7597]. MAP-E requires the provisioning of the following per- in [RFC7597]. MAP-E requires the provisioning of the following per-
subscriber information at the customer edge device: subscriber information at the customer edge device:
o the IPv6 address of one or more border routers, or in MAP-E o the IPv6 address of one or more border routers, or in MAP-E
terminology, MAP-E border relays. terminology, MAP-E border relays.
o the unique End-user IPv6 prefix for the customer edge device. o the unique end-user IPv6 prefix for the customer edge device.
This may be provided by AAA or acquired by other means. This may be provided by AAA or acquired by other means.
o the Basic Mapping Rule for the customer edge device. This o the Basic Mapping Rule for the customer edge device. This
includes the following parameters: includes the following parameters:
* the rule IPv6 prefix and length; * the Rule IPv6 prefix and length.
* the rule IPv4 prefix and length. A prefix length of 0 * the Rule IPv4 prefix and length. A prefix length of 0
indicates that the entire IPv4 address or prefix is coded in indicates that the entire IPv4 address or prefix is coded in
the Extended Address (EA) bits of the End-user IPv6 prefix the Extended Address (EA) bits of the end-user IPv6 prefix
rather than in the mapping rule. rather than in the mapping rule.
* the number of EA bits included in the End-user IPv6 prefix; * the number of EA bits included in the end-user IPv6 prefix.
* port set parameters giving the set of ports the CE is allowed * port set parameters giving the set of ports the CPE is allowed
to use when the IPv4 address is shared. Please see the to use when the IPv4 address is shared. Please see the
description of these parameters in Section 2.3. At a minimum, description of these parameters in Section 2.3. At a minimum,
the offset parameter 'a' is required. For MAP-E this has the the offset parameter 'a' is required. For MAP-E, this has the
default value 6. The parameters 'k' and PSID are needed if default value 6. The parameters 'k' and PSID are needed if
they cannot be derived from the mapping rule information and they cannot be derived from the mapping rule information and
the EA bits (final case of Section 5.2 of [RFC7597]). the EA bits (final case of Section 5.2 of [RFC7597]).
o whether the device is to operate in mesh or hub-and-spoke mode; o whether the device is to operate in Mesh or Hub-and-Spoke mode.
o in mesh mode only, zero or more Forwarding Mapping Rules, o in mesh mode only, zero or more Forwarding Mapping Rules described
described by the same set of parameters as the Basic Mapping Rule; by the same set of parameters as the Basic Mapping Rule.
As indicated in Section 5, bullet 1 of [RFC7597], a MAP CE can be As indicated in the first bullet in Section 5 of [RFC7597], a MAP CPE
provisioned with multiple End-user IPv6 prefixes, each associated can be provisioned with multiple end-user IPv6 prefixes, each
with its own Basic Mapping Rule. This does not change the basic associated with its own Basic Mapping Rule. This does not change the
requirement for representation of the corresponding information in basic requirement for representation of the corresponding information
the form of Diameter AVPs, but adds a potential requirement for in the form of Diameter AVPs, but adds a potential requirement for
multiple instances of this information to be present in the Diameter multiple instances of this information to be present in the Diameter
message, differing in the value of the End-user IPv6 prefix (in message, differing in the value of the end-user IPv6 prefix (in
contrast to the Forward Mapping Rule instances). contrast to the Forward Mapping Rule instances).
The border router needs to be configured with the superset of the The border router needs to be configured with the superset of the
Mapping Rules passed to the customer sites it serves. Since this Mapping Rules passed to the customer sites it serves. Since this
requirement does not require direct coordination with CE requirement does not require direct coordination with CPE
configuration in the way lw4o6 does, it is out of scope of the configuration in the way lw4o6 does, it is out of scope of the
present document. However, the AVPs defined here may be useful if a present document. However, the AVPs defined here may be useful if a
separate Diameter application is used to configure the border router. separate Diameter application is used to configure the border router.
2.5. Parameters For Multicast 2.5. Parameters for Multicast
[I-D.ietf-softwire-dslite-multicast] specifies a generic solution for [DSLITE-MULTICAST] specifies a generic solution for delivery of IPv4
delivery of IPv4 multicast services to IPv4 clients over an IPv6 multicast services to IPv4 clients over an IPv6 multicast network.
multicast network. The solution can be in particular deployed in a In particular, the solution can be deployed in a DS-Lite context but
DS-Lite context, but is also adaptable to lw4o6 and MAP-E. For is also adaptable to lw4o6 and MAP-E. For example, [PREFIX-OPTION]
example, [I-D.ietf-softwire-multicast-prefix-option] specifies how specifies how DHCPv6 [RFC3315] can be used to provision multicast-
DHCPv6 [RFC3315] can be used to provision multicast-related related information. The following lists the multicast-related
information. The following lists the multicast-related information information that needs to be provisioned:
that needs to be provisioned:
o ASM-mPrefix64: the IPv6 multicast prefix to be used to synthesize o ASM-mPrefix64: the IPv6 multicast prefix to be used to synthesize
the IPv4-embedded IPv6 addresses of the multicast groups in the the IPv4-embedded IPv6 addresses of the multicast groups in the
Any-Source Multicast (ASM) mode. This is achieved by Any-Source Multicast (ASM) mode. This is achieved by
concatenating the ASM-mPrefix64 and a IPv4 multicast address; the concatenating the ASM-mPrefix64 and an IPv4 multicast address; the
IPv4 multicast address is inserted in the last 32 bits of the IPv4 multicast address is inserted in the last 32 bits of the
IPv4-embedded IPv6 multicast address. IPv4-embedded IPv6 multicast address.
o SSM-mPrefix64: the IPv6 multicast prefix to be used to synthesize o SSM-mPrefix64: the IPv6 multicast prefix to be used to synthesize
the IPv4-embedded IPv6 addresses of the multicast groups in the the IPv4-embedded IPv6 addresses of the multicast groups in the
Source-Specific Multicast (SSM, [RFC4607]) mode. This is achieved Source-Specific Multicast (SSM) [RFC4607] mode. This is achieved
by concatenating the SSM-mPrefix64 and a IPv4 multicast address; by concatenating the SSM-mPrefix64 and an IPv4 multicast address;
the IPv4 multicast address is inserted in the last 32 bits of the the IPv4 multicast address is inserted in the last 32 bits of the
IPv4-embedded IPv6 multicast address. IPv4-embedded IPv6 multicast address.
o uPrefix64: the IPv6 unicast prefix to be used in SSM mode for o uPrefix64: the IPv6 unicast prefix to be used in SSM mode for
constructing the IPv4-embedded IPv6 addresses representing the constructing the IPv4-embedded IPv6 addresses representing the
IPv4 multicast sources in the IPv6 domain. uPrefix64 may also be IPv4 multicast sources in the IPv6 domain. uPrefix64 may also be
used to extract the IPv4 address from the received multicast data used to extract the IPv4 address from the received multicast data
flows. The address mapping follows the guidelines documented in flows. The address mapping follows the guidelines documented in
[RFC6052]. [RFC6052].
2.6. Summary and Discussion 2.6. Summary and Discussion
There are two items that are common to the different transition There are two items that are common to the different transition
methods, and the corresponding AVPs to carry them can be reused: methods, and the corresponding AVPs to carry them can be reused:
o a representation of the IPv6 address of a border router; o a representation of the IPv6 address of a border router.
o A set of prefixes for delivery of multicast services to IPv4 o a set of prefixes for delivery of multicast services to IPv4
clients over an IPv6 multicast network. clients over an IPv6 multicast network.
[RFC6519] sets a precedent for representation of the IPv6 address of [RFC6519] sets a precedent for representation of the IPv6 address of
a border router as an FQDN. This can be dereferenced to one or more a border router as an FQDN. This can be dereferenced to one or more
IP addresses by the provisioning system before being passed to the IP addresses by the provisioning system before being passed to the
customer equipment, or left as an FQDN as it is in [RFC6334]. customer equipment or left as an FQDN as it is in [RFC6334].
The remaining requirements are transition-method-specific: The remaining requirements are transition-method specific:
o for lw4o6, a representation of a binding between (1) either the o for lw4o6, a representation of a binding between (1) either the
IPv6 Binding Prefix or a full /128 IPv6 address, (2) a public IPv4 IPv6 Binding Prefix or a full /128 IPv6 address, (2) a public IPv4
address, and (3) (if the IPv4 address is shared) a port set address, and (3) (if the IPv4 address is shared) a port set
identifier; identifier.
o for MAP-E, a representation of the unique End-user IPv6 prefix for o for MAP-E, a representation of the unique end-user IPv6 prefix for
the CE, if not provided by other means; the CPE, if not provided by other means.
o for MAP-E, a representation of a Mapping Rule; o for MAP-E, a representation of a Mapping Rule.
o for MAP-E, an indication of whether mesh mode or hub-and-spoke o for MAP-E, an indication of whether Mesh mode or Hub-and-Spoke
mode is to be used. mode is to be used.
3. Attribute-Value Pair Definitions 3. Attribute-Value Pair Definitions
This section provides the specifications for the AVPs needed to meet This section provides the specifications for the AVPs needed to meet
the requirements summarized in Section 2.6. the requirements summarized in Section 2.6.
3.1. IP-Prefix-Length AVP 3.1. IP-Prefix-Length AVP
The IP-Prefix-Length AVP (AVP code TBD00) is of type Unsigned32. It The IP-Prefix-Length AVP (AVP code 632) is of type Unsigned32. It
provides the length of an IPv4 or IPv6 prefix. Valid values are from provides the length of an IPv4 or IPv6 prefix. Valid values are from
0 to 32 for IPv4, and from 0 to 128 for IPv6. Tighter limits are 0 to 32 for IPv4 and from 0 to 128 for IPv6. Tighter limits are
given below for particular contexts of use of this AVP. given below for particular contexts of use of this AVP.
NOTE: The IP-Prefix-Length AVP is only relevant when associated Note that the IP-Prefix-Length AVP is only relevant when associated
with an IP-Address AVP in a Grouped AVP. with an IP-Address AVP in a Grouped AVP.
3.2. Border-Router-Name AVP 3.2. Border-Router-Name AVP
Following on the precedent set by [RFC6334] and [RFC6519], this Following on the precedent set by [RFC6334] and [RFC6519], this
document identifies a border router using an FQDN rather than an document identifies a border router using an FQDN rather than an
address. The Border-Router-Name AVP (AVP Code TBD01) is of type address. The Border-Router-Name AVP (AVP Code 633) is of type
OctetString. The FQDN encoding MUST follow the Name Syntax defined OctetString. The FQDN encoding MUST follow the Name Syntax defined
in [RFC1035][RFC1123][RFC2181] and are represented in ASCII form. in [RFC1035], [RFC1123], and [RFC2181] and are represented in ASCII
Note, if Internationalized Domain Names (IDNs) are used, A-labels form. Note, if Internationalized Domain Names (IDNs) are used,
defined in [RFC5891] must be used (see Appendix D of [RFC6733]). A-labels defined in [RFC5891] must be used (see Appendix D of
[RFC6733]).
3.3. 64-Multicast-Attributes AVP 3.3. 64-Multicast-Attributes AVP
The 64-Multicast-Attributes AVP (AVP Code TBD02) is of type Grouped. The 64-Multicast-Attributes AVP (AVP Code 634) is of type Grouped.
It contains the multicast-related IPv6 prefixes needed for providing It contains the multicast-related IPv6 prefixes needed for providing
IPv4 multicast over IPv6 using DS-Lite, MAP-E, or lw4o6, as mentioned IPv4 multicast over IPv6 using DS-Lite, MAP-E, or lw4o6, as mentioned
in Section 2.5. in Section 2.5.
The syntax is shown in Figure 1. The syntax is shown in Figure 1.
64-Multicast-Attributes ::= < AVP Header: TBD02 > 64-Multicast-Attributes ::= < AVP Header: 634 >
[ ASM-mPrefix64 ] [ ASM-mPrefix64 ]
[ SSM-mPrefix64 ] [ SSM-mPrefix64 ]
[ Delegated-IPv6-Prefix ] [ Delegated-IPv6-Prefix ]
*[ AVP ] *[ AVP ]
Figure 1: 64-Multicast-Attributes AVP Figure 1: 64-Multicast-Attributes AVP
64-Multicast-Attributes AVP MUST include the ASM-mPrefix64 AVP or the The 64-Multicast-Attributes AVP MUST include the ASM-mPrefix64 AVP or
SSM-mPrefix64 AVP, and it MAY include both. the SSM-mPrefix64 AVP, and it MAY include both.
The Delegated-IPv6-Prefix AVP MUST be present when the SSM-mPrefix64 The Delegated-IPv6-Prefix AVP MUST be present when the SSM-mPrefix64
AVP is present. The Delegated-IPv6-Prefix AVP MAY be present when AVP is present. The Delegated-IPv6-Prefix AVP MAY be present when
the ASM-mPrefix64 AVP is present. the ASM-mPrefix64 AVP is present.
3.3.1. ASM-mPrefix64 AVP 3.3.1. ASM-mPrefix64 AVP
The ASM-mPrefix64 AVP (AVP Code TBD03) conveys the value of ASM- The ASM-mPrefix64 AVP (AVP Code 635) conveys the value of ASM-
mPrefix64 as mentioned in Section 2.5. The ASM-mPrefix64 AVP is of mPrefix64 as mentioned in Section 2.5. The ASM-mPrefix64 AVP is of
type Grouped, as shown in Figure 2. type Grouped, as shown in Figure 2.
ASM-mPrefix64 ::= < AVP Header: TBD03 > ASM-mPrefix64 ::= < AVP Header: 635 >
{ IP-Address } { IP-Address }
{ IP-Prefix-Length } { IP-Prefix-Length }
*[ AVP ] *[ AVP ]
Figure 2: ASM-mPrefix64 AVP Figure 2: ASM-mPrefix64 AVP
IP-Address (AVP code 518) is defined in [RFC5777] and is of type IP-Address (AVP code 518) is defined in [RFC5777] and is of type
Address. Within the ASM-mPrefix64 AVP, it provides the value of an Address. Within the ASM-mPrefix64 AVP, it provides the value of an
IPv6 prefix. The AddressType field in IP-Address MUST have value 2 IPv6 prefix. The AddressType field in IP-Address MUST have value 2
(IPv6). The conveyed multicast IPv6 prefix MUST belong to the ASM (IPv6). The conveyed multicast IPv6 prefix MUST belong to the ASM
range. Unused bits in IP-Address beyond the actual prefix MUST be range. Unused bits in IP-Address beyond the actual prefix MUST be
set to zeroes by the sender and ignored by the receiver. set to zeroes by the sender and ignored by the receiver.
The IP-Prefix-Length AVP (AVP code TBD00) provides the actual length The IP-Prefix-Length AVP (AVP code 632) provides the actual length of
of the prefix contained in the IP-Address AVP. Within the ASM- the prefix contained in the IP-Address AVP. Within the ASM-mPrefix64
mPrefix64 AVP, valid values of the IP-Prefix-Length AVP are from 24 AVP, valid values of the IP-Prefix-Length AVP are from 24 to 96.
to 96.
3.3.2. SSM-mPrefix64 AVP 3.3.2. SSM-mPrefix64 AVP
The SSM-mPrefix64 AVP (AVP Code TBD04) conveys the value of SSM- The SSM-mPrefix64 AVP (AVP Code 636) conveys the value of SSM-
mPrefix64 as mentioned in Section 2.5. The SSM-mPrefix64 AVP is of mPrefix64 as mentioned in Section 2.5. The SSM-mPrefix64 AVP is of
type Grouped, as shown in Figure 3. type Grouped, as shown in Figure 3.
SSM-mPrefix64 ::= < AVP Header: TBD04 > SSM-mPrefix64 ::= < AVP Header: 636 >
{ IP-Address } { IP-Address }
{ IP-Prefix-Length } { IP-Prefix-Length }
*[ AVP ] *[ AVP ]
Figure 3: SSM-mPrefix64 AVP Figure 3: SSM-mPrefix64 AVP
IP-Address (AVP code 518) provides the value of an IPv6 prefix. The IP-Address (AVP code 518) provides the value of an IPv6 prefix. The
AddressType field in IP-Address MUST have value 2 (IPv6). The AddressType field in IP-Address MUST have value 2 (IPv6). The
conveyed multicast IPv6 prefix MUST belong to the SSM range. Unused conveyed multicast IPv6 prefix MUST belong to the SSM range. Unused
bits in IP-Address beyond the actual prefix MUST be set to zeroes by bits in IP-Address beyond the actual prefix MUST be set to zeroes by
the sender and ignored by the receiver. the sender and ignored by the receiver.
The IP-Prefix-Length AVP (AVP code TBD00) provides the actual length The IP-Prefix-Length AVP (AVP code 632) provides the actual length of
of the prefix contained in the IP-Address AVP. the prefix contained in the IP-Address AVP.
3.3.3. Delegated-IPv6-Prefix AVP As uPrefix64 3.3.3. Delegated-IPv6-Prefix AVP as uPrefix64
Within the 64-Multicast-Attributes AVP, the Delegated-IPv6-Prefix AVP Within the 64-Multicast-Attributes AVP, the Delegated-IPv6-Prefix AVP
(AVP Code 123) conveys the value of uPrefix64, a unicast IPv6 prefix, (AVP Code 123) conveys the value of uPrefix64, a unicast IPv6 prefix,
as mentioned in Section 2.5. The Delegated-IPv6-Prefix AVP is as mentioned in Section 2.5. The Delegated-IPv6-Prefix AVP is
defined in [RFC4818]. As specified by [RFC6052], the value in the defined in [RFC4818]. As specified by [RFC6052], the value in the
Prefix-Length field MUST be one of 32, 48, 56, 64 or 96. Prefix-Length field MUST be one of 32, 48, 56, 64, or 96.
3.4. Tunnel-Source-Pref-Or-Addr AVP 3.4. Tunnel-Source-Pref-Or-Addr AVP
The Tunnel-Source-Pref-Or-Addr AVP (AVP Code TBD05) conveys either The Tunnel-Source-Pref-Or-Addr AVP (AVP Code 637) conveys either the
the IPv6 Binding Prefix or the tunnel source address on the CE, as IPv6 Binding Prefix or the tunnel source address on the CPE, as
described in Section 2.2. The Tunnel-Source-Pref-Or-Addr AVP is of described in Section 2.2. The Tunnel-Source-Pref-Or-Addr AVP is of
type Grouped, with syntax as shown in Figure 4. The Tunnel-Source- type Grouped with syntax as shown in Figure 4. The Tunnel-Source-
Pref-Or-Addr AVP MUST contain either the Delegated-IPv6-Prefix AVP or Pref-Or-Addr AVP MUST contain either the Delegated-IPv6-Prefix AVP or
the Tunnel-Source-IPv6-Address AVP, not both. the Tunnel-Source-IPv6-Address AVP, not both.
Tunnel-Source-Pref-Or-Addr ::= < AVP Header: TBD05 > Tunnel-Source-Pref-Or-Addr ::= < AVP Header: 637 >
[ Delegated-IPv6-Prefix ] [ Delegated-IPv6-Prefix ]
[ Tunnel-Source-IPv6-Address ] [ Tunnel-Source-IPv6-Address ]
*[ AVP ] *[ AVP ]
Figure 4: Tunnel-Source-Pref-Or-Addr AVP Figure 4: Tunnel-Source-Pref-Or-Addr AVP
This AVP is defined separately from the lw4o6-Binding AVP (which This AVP is defined separately from the lw4o6-Binding AVP (which
includes it) to provide flexibility in the transport of the tunnel includes it) to provide flexibility in the transport of the tunnel
source address from the provisioning system to AAA while also source address from the provisioning system to AAA while also
supporting the provision of a complete binding to the lw4o6 border supporting the provision of a complete binding to the lw4o6 border
router. router.
3.4.1. Delegated-IPv6-Prefix As the IPv6 Binding Prefix 3.4.1. Delegated-IPv6-Prefix as the IPv6 Binding Prefix
The Delegated-IPv6-Prefix AVP (AVP code 123) is of type Octetstring, The Delegated-IPv6-Prefix AVP (AVP code 123) is of type OctetString
and is defined in [RFC4818]. Within the Tunnel-Source-Pref-Or-Addr and is defined in [RFC4818]. Within the Tunnel-Source-Pref-Or-Addr
AVP, it conveys the IPv6 Binding Prefix assigned to the CE. Valid AVP, it conveys the IPv6 Binding Prefix assigned to the CPE. Valid
values in the Prefix-Length field are from 0 to 128 (full address). values in the Prefix-Length field are from 0 to 128 (full address).
3.4.2. Tunnel-Source-IPv6-Address AVP 3.4.2. Tunnel-Source-IPv6-Address AVP
The Tunnel-Source-IPv6-Address AVP (AVP code TBD06) is of type The Tunnel-Source-IPv6-Address AVP (AVP code 638) is of type Address.
Address. It provides the address that the CE has assigned to its end It provides the address assigned by the CPE to identify its local end
of an lw4o6 tunnel. The AddressType field in this AVP MUST be set to of an lw4o6 tunnel. The AddressType field in this AVP MUST be set to
2 (IPv6). 2 (IPv6).
3.5. Port-Set-Identifier 3.5. Port-Set-Identifier
The Port-Set-Identifier AVP (AVP Code TBD07) is a structured The Port-Set-Identifier AVP (AVP Code 639) is a structured
OctetString with four octets of data, hence a total AVP length of 12. OctetString with four octets of data, hence a total AVP length of 12.
The description of the structure which follows refers to refers to The description of the structure that follows refers to the
the parameters described in Section 2.3 (see Figure 5). parameters described in Section 2.3 (see Figure 5).
o The first (high-order) octet is the Offset field. It is o The first (high-order) octet is the Offset field. It is
interpreted as an 8-bit unsigned integer giving the offset 'a' interpreted as an 8-bit unsigned integer giving the offset 'a'
from the beginning of a port number to the beginning of the port from the beginning of a port number to the beginning of the PSID
set identifier (PSID) to which that port belongs. Valid values to which that port belongs. Valid values are from 0 to 15.
are from 0 to 15.
o The next octet, the PSIDLength, is also interpreted as an 8-bit o The next octet, the PSIDLength, is also interpreted as an 8-bit
unsigned integer and gives the length 'k' in bits of the port set unsigned integer and gives the length 'k' in bits of the PSID.
identifier (PSID). Valid values are from 0 to (16 - a). A value Valid values are from 0 to (16 - a). A value of 0 indicates that
of 0 indicates that the PSID is not present (probable case for the PSID is not present (probable case for MAP-E, see
MAP-E, see Section 2.4), and the PSIDValue field MUST be ignored. Section 2.4), and the PSIDValue field MUST be ignored.
o The final two octets contain the PSIDValue field. They give the o The final two octets contain the PSIDValue field. They give the
value of the PSID itself, right-justified within the field. That value of the PSID itself, right justified within the field. That
is, the value of the PSID occupies the 'k' lowest-order bits of is, the value of the PSID occupies the 'k' lowest-order bits of
the PSIDValue field. the PSIDValue field.
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Offset | Length | PSID Value | | Offset | Length | PSID Value |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5: Port Set Figure 5: Port Set
3.6. Lw4o6-Binding AVP 3.6. Lw4o6-Binding AVP
The Lw4o6-Binding AVP (AVP Code TBD08) is of type Grouped. It The Lw4o6-Binding AVP (AVP Code 640) is of type Grouped. It contains
contains the elements of configuration that constitute the binding the elements of configuration that constitute the binding between an
between an lw4o6 tunnel and IPv4 packets sent through that tunnel, as lw4o6 tunnel and IPv4 packets sent through that tunnel, as described
described in Section 2.2. in Section 2.2.
Lw4o6-Binding ::= < AVP Header: TBD08 > Lw4o6-Binding ::= < AVP Header: 640 >
{ Tunnel-Source-Pref-Or-Addr } { Tunnel-Source-Pref-Or-Addr }
{ Lw4o6-External-IPv4-Addr } { Lw4o6-External-IPv4-Addr }
[ Port-Set-Identifier ] [ Port-Set-Identifier ]
*[ AVP ] *[ AVP ]
Figure 6: Lw4o6-Binding AVP Figure 6: Lw4o6-Binding AVP
The Tunnel-Source-Pref-Or-Addr AVP is defined in Section 3.4 and The Tunnel-Source-Pref-Or-Addr AVP is defined in Section 3.4 and
provides either the Binding Prefix or the full IPv6 tunnel source provides either the Binding Prefix or the full IPv6 tunnel source
address. address.
The Lw4o6-External-IPv4-Addr AVP is defined in Section 3.6.1. The Lw4o6-External-IPv4-Addr AVP is defined in Section 3.6.1.
The Port-Set-Identifier AVP is defined in Section 3.5. It identifies The Port-Set-Identifier AVP is defined in Section 3.5. It identifies
the specific set of ports assigned to the lw4o6 tunnel, when the IPv4 the specific set of ports assigned to the lw4o6 tunnel when the IPv4
address is being shared. address is being shared.
3.6.1. Lw4o6-External-IPv4-Addr AVP 3.6.1. Lw4o6-External-IPv4-Addr AVP
The Lw4o6-External-IPv4-Addr AVP (AVP Code TBD09) uses the Address The Lw4o6-External-IPv4-Addr AVP (AVP Code 641) uses the Address
derived data format defined in Section 4.3.1 of [RFC6733]. It derived data format defined in Section 4.3.1 of [RFC6733]. It
provides the CE's external IPv4 address within the lw4o6 tunnel provides the CPE's external IPv4 address within the lw4o6 tunnel
associated with the given binding. The AddressType field MUST be set associated with the given binding. The AddressType field MUST be set
to 1 (IPv4), and the total length of the AVP MUST be 14 octets. to 1 (IPv4), and the total length of the AVP MUST be 14 octets.
3.7. MAP-E-Attributes 3.7. MAP-E-Attributes
The MAP-E-Attributes AVP (AVP Code TBD10) is of type Grouped. It The MAP-E-Attributes AVP (AVP Code 642) is of type Grouped. It
contains the configuration data identified in Section 2.4 for all of contains the configuration data identified in Section 2.4 for all of
the mapping rules (Basic and Forwarding) in a single MAP domain. the mapping rules (Basic and Forwarding) in a single MAP domain.
Multiple instances of this AVP will be present if the CE belongs to Multiple instances of this AVP will be present if the CPE belongs to
multiple MAP domains. multiple MAP domains.
MAP-E-Attributes ::= < AVP Header: TBD06 > MAP-E-Attributes ::= < AVP Header: 642 >
1*{ Border-Router-Name } 1*{ Border-Router-Name }
1*{ MAP-Mapping-Rule } 1*{ MAP-Mapping-Rule }
[ MAP-Mesh-Mode ] [ MAP-Mesh-Mode ]
[ Delegated-IPv6-Prefix ] [ Delegated-IPv6-Prefix ]
*[ AVP ] *[ AVP ]
Figure 7: MAP-E-Attributes AVP Figure 7: MAP-E-Attributes AVP
The Border-Router-Name AVP is defined in Section 3.2. It provides The Border-Router-Name AVP is defined in Section 3.2. It provides
the FQDN of a MAP border relay at the edge of the MAP domain to which the FQDN of a MAP border relay at the edge of the MAP domain to which
the containing MAP-E-Attributes AVP relates. At least one instance the containing MAP-E-Attributes AVP relates. At least one instance
of this AVP MUST be present. of this AVP MUST be present.
The MAP-Mapping-Rule AVP is defined in Section 3.9. At least one The MAP-Mapping-Rule AVP is defined in Section 3.9. At least one
instance of this AVP MUST be present. If the MAP-E domain supports instance of this AVP MUST be present. If the MAP-E domain supports
mesh mode (indicated by the presence of the MAP-Mesh-Mode AVP), Mesh mode (indicated by the presence of the MAP-Mesh-Mode AVP),
additional MAP-Mapping-Rule instances MAY be present. If the MAP-E additional MAP-Mapping-Rule instances MAY be present. If the MAP-E
domain is operating in hub-and-spoke mode, additional MAP-Mapping- domain is operating in Hub-and-Spoke mode; additional MAP-Mapping-
Rule instances MUST NOT be present. Rule instances MUST NOT be present.
The MAP-Mesh-Mode AVP is defined in Section 3.8. The absence of the The MAP-Mesh-Mode AVP is defined in Section 3.8. The absence of the
mesh mode indicator attribute indicates that the CE is required to Mesh mode indicator attribute indicates that the CPE is required to
operate in hub-and-spoke mode. operate in Hub-and-Spoke mode.
The Delegated-IPv6-Prefix AVP (AVP Code 123) provides the End-user The Delegated-IPv6-Prefix AVP (AVP Code 123) provides the end-user
IPv6 prefix assigned to the CE for the MAP domain to which the IPv6 prefix assigned to the CPE for the MAP domain to which the
containing MAP-E-Attributes AVP relates. The AVP is defined in containing MAP-E-Attributes AVP relates. The AVP is defined in
[RFC4818]. Valid values of the Prefix-Length field range from 0 to [RFC4818]. Valid values of the Prefix-Length field range from 0 to
128. 128.
The Delegated-IPv6-Prefix AVP is optional because, depending on The Delegated-IPv6-Prefix AVP is optional because, depending on
deployment, the End-user IPv6 prefix may be provided by AAA or by deployment, the end-user IPv6 prefix may be provided by AAA or by
other means. If multiple instances of the MAP-E-Attributes AVP other means. If multiple instances of the MAP-E-Attributes AVP
containing the Delegated-IPv6-Prefix AVP are present, each instance containing the Delegated-IPv6-Prefix AVP are present, each instance
of the latter MUST have a different value. of the latter MUST have a different value.
3.8. MAP-Mesh-Mode 3.8. MAP-Mesh-Mode
The MAP-Mesh-Mode AVP (AVP Code TBD11) is of type Enumerated and The MAP-Mesh-Mode AVP (AVP Code 643) is of type Enumerated and
indicates whether the CE has to operate in mesh mode or hub-and-spoke indicates whether the CPE has to operate in Mesh or Hub-and-Spoke
when using MAP-E. The following values are supported: mode when using MAP-E. The following values are supported:
0 MESH 0 MESH
1 HUB_AND_SPOKE 1 HUB_AND_SPOKE
The absence of the mesh mode indicator attribute indicates that the The absence of the Mesh mode indicator attribute indicates that the
CE is required to operate in hub-and-spoke mode. CPE is required to operate in Hub-and-Spoke mode.
3.9. MAP-Mapping-Rule 3.9. MAP-Mapping-Rule
The MAP-Mapping-Rule AVP (AVP Code TBD12) is of type Grouped, and is The MAP-Mapping-Rule AVP (AVP Code 644) is of type Grouped and is
used only in conjunction with MAP-based transition methods. Mapping used only in conjunction with MAP-based transition methods. Mapping
rules are required both by the MAP border relay and by the CE. The rules are required both by the MAP border relay and by the CPE. The
components of the MAP-Mapping-Rule AVP provide the contents of a components of the MAP-Mapping-Rule AVP provide the contents of a
mapping rule as described in Section 2.4. mapping rule as described in Section 2.4.
The syntax of the MAP-Mapping-Rule AVP is as follows: The syntax of the MAP-Mapping-Rule AVP is as follows:
MAP-Mapping-Rule ::= < AVP Header: TBD12 > MAP-Mapping-Rule ::= < AVP Header: 644 >
{ Rule-IPv4-Addr-Or-Prefix } { Rule-IPv4-Addr-Or-Prefix }
{ Rule-IPv6-Prefix } { Rule-IPv6-Prefix }
{ EA-Field-Length } { EA-Field-Length }
{ Port-Set-Identifier } { Port-Set-Identifier }
*[ AVP ] *[ AVP ]
Figure 8: MAP-Mapping-Rule AVP Figure 8: MAP-Mapping-Rule AVP
The Rule-IPv4-Addr-Or-Prefix, Rule-IPv6-Prefix, EA-Field-Length, and The Rule-IPv4-Addr-Or-Prefix, Rule-IPv6-Prefix, EA-Field-Length, and
Port-Set-Identifier AVPs MUST all be present. Port-Set-Identifier AVPs MUST all be present.
The Port-Set-Identifier AVP provides information to identify the The Port-Set-Identifier AVP provides information to identify the
specific set of ports assigned to the CE. For more information see specific set of ports assigned to the CPE. For more information, see
Section 2.4 and Section 2.3. The Port-Set-Identifier AVP is defined Sections 2.4 and 2.3. The Port-Set-Identifier AVP is defined in
in Section 3.5. Section 3.5.
3.9.1. Rule-IPv4-Addr-Or-Prefix AVP 3.9.1. Rule-IPv4-Addr-Or-Prefix AVP
The Rule-IPv4-Addr-Or-Prefix AVP (AVP Code TBD13) conveys the rule The Rule-IPv4-Addr-Or-Prefix AVP (AVP Code 645) conveys the Rule IPv4
IPv4 prefix and length as described in Section 2.4. The Rule-IPv4- prefix and length as described in Section 2.4. The Rule-IPv4-Addr-
Addr-Or-Prefix AVP is of type Grouped, as shown in Figure 9. Or-Prefix AVP is of type Grouped, as shown in Figure 9.
Rule-IPv4-Addr-Or-Prefix ::= < AVP Header: TBD13 > Rule-IPv4-Addr-Or-Prefix ::= < AVP Header: 645 >
{ IP-Address } { IP-Address }
{ IP-Prefix-Length } { IP-Prefix-Length }
*[ AVP ] *[ AVP ]
Figure 9: Rule-IPv4-Addr-Or-Prefix AVP Figure 9: Rule-IPv4-Addr-Or-Prefix AVP
IP-Address (AVP code 518) is defined in [RFC5777] and is of type IP-Address (AVP code 518) is defined in [RFC5777] and is of type
Address. Within the Rule-IPv4-Addr-Or-Prefix AVP, it provides the Address. Within the Rule-IPv4-Addr-Or-Prefix AVP, it provides the
value of a unicast IPv4 address or prefix. The AddressType field in value of a unicast IPv4 address or prefix. The AddressType field in
IP-Address MUST have value 1 (IPv4). Unused bits in IP-Address IP-Address MUST have value 1 (IPv4). Unused bits in IP-Address
beyond the actual prefix MUST be set to zeroes by the sender and beyond the actual prefix MUST be set to zeroes by the sender and
ignored by the receiver. ignored by the receiver.
The IP-Prefix-Length AVP (AVP code TBD00) provides the actual length The IP-Prefix-Length AVP (AVP code 632) provides the actual length of
of the prefix contained in the IP-Address AVP. Within the Rule-IPv4- the prefix contained in the IP-Address AVP. Within the Rule-IPv4-
Addr-Or-Prefix AVP, valid values of the IP-Prefix-Length AVP are from Addr-Or-Prefix AVP, valid values of the IP-Prefix-Length AVP are from
0 to 32 (full address), based on the different cases identified in 0 to 32 (full address) based on the different cases identified in
Section 5.2 of [RFC7597]. Section 5.2 of [RFC7597].
3.9.2. Rule-IPv6-Prefix AVP 3.9.2. Rule-IPv6-Prefix AVP
The Rule-IPv6-Prefix AVP (AVP Code TBD14) conveys the rule IPv6 The Rule-IPv6-Prefix AVP (AVP Code 646) conveys the Rule IPv6 prefix
prefix and length as described in Section 2.4. The Rule-IPv6-Prefix and length as described in Section 2.4. The Rule-IPv6-Prefix AVP is
AVP is of type Grouped, as shown in Figure 10. of type Grouped, as shown in Figure 10.
Rule-IPv6-Prefix ::= < AVP Header: TBD14 > Rule-IPv6-Prefix ::= < AVP Header: 646 >
{ IP-Address } { IP-Address }
{ IP-Prefix-Length } { IP-Prefix-Length }
*[ AVP ] *[ AVP ]
Figure 10: Rule-IPv6-Prefix AVP Figure 10: Rule-IPv6-Prefix AVP
IP-Address (AVP code 518) is defined in [RFC5777] and is of type IP-Address (AVP code 518) is defined in [RFC5777] and is of type
Address. Within the Rule-IPv6-Prefix AVP, it provides the value of a Address. Within the Rule-IPv6-Prefix AVP, it provides the value of a
unicast IPv6 prefix. The AddressType field in IP- Address MUST have unicast IPv6 prefix. The AddressType field in IP-Address MUST have
value 2 (IPv6). Unused bits in IP-Address beyond the actual prefix value 2 (IPv6). Unused bits in IP-Address beyond the actual prefix
MUST be set to zeroes by the sender and ignored by the receiver. MUST be set to zeroes by the sender and ignored by the receiver.
The IP-Prefix-Length AVP (AVP code TBD00) provides the actual length The IP-Prefix-Length AVP (AVP code 632) provides the actual length of
of the prefix contained in the IP-Address AVP. Within the Rule- the prefix contained in the IP-Address AVP. Within the Rule-
IPv6-Prefix AVP, the minimum valid prefix length is 0. The maximum IPv6-Prefix AVP, the minimum valid prefix length is 0. The maximum
value is bounded by the length of the End-user IPv6 prefix associated value is bounded by the length of the end-user IPv6 prefix associated
with the mapping rule, if present in the form of the Delegated- with the mapping rule, if present in the form of the Delegated-
IPv6-Prefix AVP in the enclosing MAP-E-Attributes AVP. Otherwise the IPv6-Prefix AVP in the enclosing MAP-E-Attributes AVP. Otherwise,
maximum value is 128. the maximum value is 128.
3.9.3. EA-Field-Length AVP 3.9.3. EA-Field-Length AVP
The EA-Field-Length AVP (AVP Code TBD15) is of type Unsigned32. The EA-Field-Length AVP (AVP Code 647) is of type Unsigned32. Valid
Valid values range from 0 to 48. See Section 5.2 of [RFC7597] for a values range from 0 to 48. See Section 5.2 of [RFC7597] for a
description of the use of this parameter in deriving IPv4 address and description of the use of this parameter in deriving IPv4 address and
port number configuration. port number configuration.
4. Attribute Value Pair Flag Rules 4. Attribute-Value Pair Flag Rules
+---------+ +---------+
|AVP flag | |AVP flag |
|rules | |rules |
+----+----+ +----+----+
AVP Section | |MUST| AVP Section | |MUST|
Attribute Name Code Defined Value Type |MUST| NOT| Attribute Name Code Defined Value Type |MUST| NOT|
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|IP-Prefix-Length TBD00 3.1 Unsigned32 | | V | |IP-Prefix-Length 632 3.1 Unsigned32 | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Border-Router-Name TBD01 3.2 OctetString | | V | |Border-Router-Name 633 3.2 OctetString | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|64-Multicast-Attributes TBD02 3.3 Grouped | | V | |64-Multicast-Attributes 634 3.3 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|ASM-mPrefix64 TBD03 3.3.1 Grouped | | V | |ASM-mPrefix64 635 3.3.1 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|SSM-mPrefix64 TBD04 3.3.2 Grouped | | V | |SSM-mPrefix64 636 3.3.2 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Tunnel-Source-Pref-Or-Addr TBD05 3.4 Grouped | | V | |Tunnel-Source-Pref-Or-Addr 637 3.4 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Tunnel-Source-IPv6-Address TBD06 3.4.2 Address | | V | |Tunnel-Source-IPv6-Address 638 3.4.2 Address | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Port-Set-Identifier TBD07 3.5 OctetString | | V | |Port-Set-Identifier 639 3.5 OctetString | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Lw4o6-Binding TBD08 3.6 Grouped | | V | |Lw4o6-Binding 640 3.6 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Lw4o6-External-IPv4-Addr TBD09 3.6.1 Address | | V | |Lw4o6-External-IPv4-Addr 641 3.6.1 Address | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|MAP-E-Attributes TBD10 3.7 Grouped | | V | |MAP-E-Attributes 642 3.7 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|MAP-Mesh-Mode TBD11 3.8 Enumerated | | V | |MAP-Mesh-Mode 643 3.8 Enumerated | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|MAP-Mapping-Rule TBD12 3.9 Grouped | | V | |MAP-Mapping-Rule 644 3.9 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Rule-IPv4-Addr-Or-Prefix TBD13 3.9.1 Grouped | | V | |Rule-IPv4-Addr-Or-Prefix 645 3.9.1 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|Rule-IPv6-Prefix TBD14 3.9.2 Grouped | | V | |Rule-IPv6-Prefix 646 3.9.2 Grouped | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
|EA-Field-Length TBD15 3.9.3 Unsigned32 | | V | |EA-Field-Length 647 3.9.3 Unsigned32 | | V |
+-------------------------------------------------------+----+----+ +-------------------------------------------------------+----+----+
As described in the Diameter base protocol [RFC6733], the M-bit usage As described in the Diameter base protocol [RFC6733], the M-bit usage
for a given AVP in a given command may be defined by the application. for a given AVP in a given command may be defined by the application.
5. IANA Considerations 5. IANA Considerations
This memo requests to IANA to register the following Diameter AVP IANA has registered the following Diameter AVP codes in the "AVP
codes: Codes" registry:
+-------+----------------------------+---------------+ +------+----------------------------+---------------+
| Code | Attribute Name | Reference | | Code | Attribute Name | Reference |
+-------+----------------------------+---------------+ +------+----------------------------+---------------+
| TBD00 | IP-Prefix-Length | This document | | 632 | IP-Prefix-Length | This document |
| TBD01 | Border-Router-Name | This document | | 633 | Border-Router-Name | This document |
| TBD02 | 64-Multicast-Attributes | This document | | 634 | 64-Multicast-Attributes | This document |
| TBD03 | ASM-mPrefix64 | This document | | 635 | ASM-mPrefix64 | This document |
| TBD04 | SSM-mPrefix64 | This document | | 636 | SSM-mPrefix64 | This document |
| TBD05 | Tunnel-Source-Pref-Or-Addr | This document | | 637 | Tunnel-Source-Pref-Or-Addr | This document |
| TBD06 | Tunnel-Source-IPv6-Address | This document | | 638 | Tunnel-Source-IPv6-Address | This document |
| TBD07 | Port-Set-Identifier | This document | | 639 | Port-Set-Identifier | This document |
| TBD08 | Lw4o6-Binding | This document | | 640 | Lw4o6-Binding | This document |
| TBD09 | Lw4o6-External-IPv4-Addr | This document | | 641 | Lw4o6-External-IPv4-Addr | This document |
| TBD10 | MAP-E-Attributes | This document | | 642 | MAP-E-Attributes | This document |
| TBD11 | MAP-Mesh-Mode | This document | | 643 | MAP-Mesh-Mode | This document |
| TBD12 | MAP-Mapping-Rule | This document | | 644 | MAP-Mapping-Rule | This document |
| TBD13 | Rule-IPv4-Addr-Or-Prefix | This document | | 645 | Rule-IPv4-Addr-Or-Prefix | This document |
| TBD14 | Rule-IPv6-Prefix | This document | | 646 | Rule-IPv6-Prefix | This document |
| TBD15 | EA-Field-Length | This document | | 647 | EA-Field-Length | This document |
+-------+----------------------------+---------------+ +------+----------------------------+---------------+
Table 1 Table 1: Diameter AVP Codes
6. Security Considerations 6. Security Considerations
6.1. Man-In-The-Middle (MITM) Attacks 6.1. Man-In-The-Middle (MITM) Attacks
The AVPs defined in this document face two threats, both dependent on The AVPs defined in this document face two threats, both dependent on
man-in-the-middle (MITM) attacks on the Diameter delivery path. man-in-the-middle (MITM) attacks on the Diameter delivery path.
The first threat is denial-of-service (DoS) through modification of The first threat is denial-of-service (DoS) through modification of
the AVP contents leading to misconfiguration, e.g., a subscriber may the AVP contents leading to misconfiguration; e.g., a subscriber may
fail to access its connectivity service if an invalid IP address was fail to access its connectivity service if an invalid IP address was
configured, the subscriber's traffic can be intercepted by a configured, the subscriber's traffic can be intercepted by a
misbehaving node if a fake Border Node has been configured, etc. misbehaving node if a fake Border Node has been configured, etc.
The second threat is that Diameter security is currently provided on The second threat is that Diameter security is currently provided on
a hop-by-hop basis (see Section 2.2 of [RFC6733]). At the time of a hop-by-hop basis (see Section 2.2 of [RFC6733]). At the time of
writing, the Diameter end-to-end security problem has not been writing, the Diameter end-to-end security problem has not been
solved, so MITM attacks by Diameter peers along the path are solved, so MITM attacks by Diameter peers along the path are
possible. Diameter-related security considerations are discussed in possible. Diameter-related security considerations are discussed in
Section 13 of [RFC6733]. Section 13 of [RFC6733].
6.2. Privacy 6.2. Privacy
Given that the AVPs defined in this document reveal privacy-related Given that the AVPs defined in this document reveal privacy-related
information (e.g., subscriber addresses) that can be used for information (e.g., subscriber addresses) that can be used for
tracking proposes, all these AVPs are considered to be security- tracking proposes, all these AVPs are considered to be security
sensitive. Therefore the considerations discussed in Section 13.3 of sensitive. Therefore, the considerations discussed in Section 13.3
[RFC6733] MUST be followed for Diameter messages containing these of [RFC6733] MUST be followed for Diameter messages containing these
AVPs. AVPs.
7. Acknowledgements 7. References
Huawei Technologies funded Tom Taylor's work on earlier versions of
this document.
Special thanks to Lionel Morand for the detailed review.
Many thanks to Russ Housley, Tim Chown, Spencer Dawkins, and Ben
Campbell for the review and comments.
8. References
8.1. Normative References 7.1. Normative References
[RFC1035] Mockapetris, P., "Domain names - implementation and [RFC1035] Mockapetris, P., "Domain names - implementation and
specification", STD 13, RFC 1035, DOI 10.17487/RFC1035, specification", STD 13, RFC 1035, DOI 10.17487/RFC1035,
November 1987, <http://www.rfc-editor.org/info/rfc1035>. November 1987, <http://www.rfc-editor.org/info/rfc1035>.
[RFC1123] Braden, R., Ed., "Requirements for Internet Hosts - [RFC1123] Braden, R., Ed., "Requirements for Internet Hosts -
Application and Support", STD 3, RFC 1123, Application and Support", STD 3, RFC 1123,
DOI 10.17487/RFC1123, October 1989, DOI 10.17487/RFC1123, October 1989,
<http://www.rfc-editor.org/info/rfc1123>. <http://www.rfc-editor.org/info/rfc1123>.
skipping to change at page 20, line 37 skipping to change at page 21, line 26
Farrer, "Lightweight 4over6: An Extension to the Dual- Farrer, "Lightweight 4over6: An Extension to the Dual-
Stack Lite Architecture", RFC 7596, DOI 10.17487/RFC7596, Stack Lite Architecture", RFC 7596, DOI 10.17487/RFC7596,
July 2015, <http://www.rfc-editor.org/info/rfc7596>. July 2015, <http://www.rfc-editor.org/info/rfc7596>.
[RFC7597] Troan, O., Ed., Dec, W., Li, X., Bao, C., Matsushima, S., [RFC7597] Troan, O., Ed., Dec, W., Li, X., Bao, C., Matsushima, S.,
Murakami, T., and T. Taylor, Ed., "Mapping of Address and Murakami, T., and T. Taylor, Ed., "Mapping of Address and
Port with Encapsulation (MAP-E)", RFC 7597, Port with Encapsulation (MAP-E)", RFC 7597,
DOI 10.17487/RFC7597, July 2015, DOI 10.17487/RFC7597, July 2015,
<http://www.rfc-editor.org/info/rfc7597>. <http://www.rfc-editor.org/info/rfc7597>.
8.2. Informative References 7.2. Informative References
[I-D.ietf-softwire-dslite-multicast] [DSLITE-MULTICAST]
Qin, J., Boucadair, M., Jacquenet, C., Lee, Y., and Q. Qin, J., Boucadair, M., Jacquenet, C., Lee, Y., and Q.
Wang, "Delivery of IPv4 Multicast Services to IPv4 Clients Wang, "Delivery of IPv4 Multicast Services to IPv4 Clients
over an IPv6 Multicast Network", draft-ietf-softwire- over an IPv6 Multicast Network", Work in Progress,
dslite-multicast-09 (work in progress), March 2015. draft-ietf-softwire-dslite-multicast-10, August 2015.
[I-D.ietf-softwire-multicast-prefix-option] [PREFIX-OPTION]
Boucadair, M., Qin, J., Tsou, T., and X. Deng, "DHCPv6 Boucadair, M., Qin, J., Tsou, T., and X. Deng, "DHCPv6
Option for IPv4-Embedded Multicast and Unicast IPv6 Option for IPv4-Embedded Multicast and Unicast IPv6
Prefixes", draft-ietf-softwire-multicast-prefix-option-08 Prefixes", Work in Progress, draft-ietf-softwire-
(work in progress), March 2015. multicast-prefix-option-09, August 2015.
[RFC3315] Droms, R., Ed., Bound, J., Volz, B., Lemon, T., Perkins, [RFC3315] Droms, R., Ed., Bound, J., Volz, B., Lemon, T., Perkins,
C., and M. Carney, "Dynamic Host Configuration Protocol C., and M. Carney, "Dynamic Host Configuration Protocol
for IPv6 (DHCPv6)", RFC 3315, DOI 10.17487/RFC3315, July for IPv6 (DHCPv6)", RFC 3315, DOI 10.17487/RFC3315, July
2003, <http://www.rfc-editor.org/info/rfc3315>. 2003, <http://www.rfc-editor.org/info/rfc3315>.
[RFC4607] Holbrook, H. and B. Cain, "Source-Specific Multicast for [RFC4607] Holbrook, H. and B. Cain, "Source-Specific Multicast for
IP", RFC 4607, DOI 10.17487/RFC4607, August 2006, IP", RFC 4607, DOI 10.17487/RFC4607, August 2006,
<http://www.rfc-editor.org/info/rfc4607>. <http://www.rfc-editor.org/info/rfc4607>.
skipping to change at page 21, line 34 skipping to change at page 22, line 20
[RFC6519] Maglione, R. and A. Durand, "RADIUS Extensions for Dual- [RFC6519] Maglione, R. and A. Durand, "RADIUS Extensions for Dual-
Stack Lite", RFC 6519, DOI 10.17487/RFC6519, February Stack Lite", RFC 6519, DOI 10.17487/RFC6519, February
2012, <http://www.rfc-editor.org/info/rfc6519>. 2012, <http://www.rfc-editor.org/info/rfc6519>.
[RFC7598] Mrugalski, T., Troan, O., Farrer, I., Perreault, S., Dec, [RFC7598] Mrugalski, T., Troan, O., Farrer, I., Perreault, S., Dec,
W., Bao, C., Yeh, L., and X. Deng, "DHCPv6 Options for W., Bao, C., Yeh, L., and X. Deng, "DHCPv6 Options for
Configuration of Softwire Address and Port-Mapped Configuration of Softwire Address and Port-Mapped
Clients", RFC 7598, DOI 10.17487/RFC7598, July 2015, Clients", RFC 7598, DOI 10.17487/RFC7598, July 2015,
<http://www.rfc-editor.org/info/rfc7598>. <http://www.rfc-editor.org/info/rfc7598>.
Acknowledgements
Huawei Technologies funded Tom Taylor's work on earlier draft
versions of this document.
Special thanks to Lionel Morand for the detailed review.
Many thanks to Russ Housley, Tim Chown, Spencer Dawkins, and Ben
Campbell for the review and comments.
Authors' Addresses Authors' Addresses
Cathy Zhou Cathy Zhou
Huawei Technologies Huawei Technologies
Bantian, Longgang District Bantian, Longgang District
Shenzhen 518129 Shenzhen 518129
P.R. China China
Email: cathy.zhou@huawei.com Email: cathy.zhou@huawei.com
Tom Taylor Tom Taylor
PT Taylor Consulting PT Taylor Consulting
Ottawa Ottawa
Canada Canada
Email: tom.taylor.stds@gmail.com Email: tom.taylor.stds@gmail.com
Qiong Sun Qiong Sun
China Telecom China Telecom
P.R.China China
Phone: 86 10 58552936 Phone: 86 10 58552936
Email: sunqiong@ctbri.com.cn Email: sunqiong@ctbri.com.cn
Mohamed Boucadair Mohamed Boucadair
France Telecom France Telecom
Rennes 35000 Rennes 35000
France France
Email: mohamed.boucadair@orange.com Email: mohamed.boucadair@orange.com
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