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Versions: (draft-tschofenig-dime-mip6-integrated)
00 01 02 03 04 05 06 07 08 09 10 11
12 RFC 5447
Diameter Maintenance and J. Korhonen (ed.)
Extensions (DIME) TeliaSonera
Internet-Draft J. Bournelle
Intended status: Standards Track France Telecom R&D
Expires: December 2, 2007 H. Tschofenig
C. Perkins
Nokia Siemens Networks
K. Chowdhury
Starent Networks
May 31, 2007
Diameter Mobile IPv6: Support for Network Access Server to Diameter
Server Interaction
draft-ietf-dime-mip6-integrated-04.txt
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This Internet-Draft will expire on December 2, 2007.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
A Mobile IPv6 node requires a Home Agent address, a home address, and
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a security association with its Home Agent before it can start
utilizing Mobile IPv6. RFC 3775 requires that some or all of these
parameters are statically configured. Mobile IPv6 bootstrapping work
aims to make this information dynamically available to the Mobile
Node. An important aspect of the Mobile IPv6 bootstrapping solution
is to support interworking with existing authentication,
authorization and accounting infrastructure. This document describes
the MIPv6 bootstrapping using the Diameter Network Access Server
(NAS) to home Authentication, Authorization and Accounting server
(HAAA) interface.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology and Abbreviations . . . . . . . . . . . . . . . . 3
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Commands, AVPs and Advertising Application Support . . . . . . 6
4.1. Advertising Application Support . . . . . . . . . . . . . 6
4.2. Command Codes . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Diameter-EAP-Request (DER) . . . . . . . . . . . . . . . . 6
4.4. Diameter-EAP-Answer (DEA) . . . . . . . . . . . . . . . . 7
4.5. AA-Request (AAR) . . . . . . . . . . . . . . . . . . . . . 7
4.6. AA-Answer (AAA) . . . . . . . . . . . . . . . . . . . . . 8
4.7. Attribute Value Pair Definitions . . . . . . . . . . . . . 9
4.7.1. Mobility-Agent-Info . . . . . . . . . . . . . . . . . 9
4.7.2. MIP6-Home-Agent-Address AVP . . . . . . . . . . . . . 9
4.7.3. MIP6-Home-Agent-FQDN AVP . . . . . . . . . . . . . . . 9
4.7.4. Mobility-Capability AVP . . . . . . . . . . . . . . . 9
5. Example Message Flows . . . . . . . . . . . . . . . . . . . . 10
5.1. EAP-based Authentication . . . . . . . . . . . . . . . . . 10
5.2. Integrated Scenario and HA Allocation in MSP . . . . . . . 11
5.3. Integrated Scenario and HA Allocation in ASP . . . . . . . 13
6. AVP Occurrence Tables . . . . . . . . . . . . . . . . . . . . 14
6.1. AAR, AAA, DER and DEA Commands AVP Table . . . . . . . . . 14
7. MIPv6 Bootstrapping NAS to HAAA Interface AVPs . . . . . . . . 14
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
8.1. Registration of new AVPs . . . . . . . . . . . . . . . . . 15
8.2. New Registry: Mobility Capability . . . . . . . . . . . . 15
9. Security Considerations . . . . . . . . . . . . . . . . . . . 16
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
11.1. Normative References . . . . . . . . . . . . . . . . . . . 16
11.2. Informative References . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 17
Intellectual Property and Copyright Statements . . . . . . . . . . 19
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1. Introduction
The Mobile IPv6 (MIPv6) specification [1] requires a Mobile Node (MN)
to perform registration with a Home Agent (HA) with information about
its current point of attachment (Care-of Address). The HA creates
and maintains binding between the MN's Home Address and the MN's
Care-of Address.
In order to register with a HA, the MN needs to know some information
such as the Home Link prefix, the HA address, the Home Address(es),
the Home Link prefix Length and security association related
information.
The aforementioned set of information may be statically provisioned
in the MN. However, static provisioning of this information becomes
an administrative burden for an operator. Moreover, static
provisioning does not address load balancing, failover, opportunistic
home link assignment and assignment of local home agents in close
proximity to the MN. Also the ability to react on sudden
environmental or topological changes is minimal. Static provisioning
may not be desirable, in light of the mentioned limitations.
Dynamic assignment of MIPv6 home registration information is a
desirable feature for ease of deployment and network maintenance.
For this purpose, the AAA infrastructure, which is used for access
authentication, can be leveraged to assign some or all of the
necessary parameters. The Diameter server in Access Service
Provider's (ASP) or in Mobility Service Provider's (MSP) network may
return these parameters to the AAA client. Regarding the
bootstrapping procedures, the AAA client might either be the NAS, in
case of the integrated scenario, or the HA, in case of the split
scenario [6]. The terms integrated and split are described in the
terminology section and were introduced in [7] and [8].
2. Terminology and Abbreviations
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC2119 [2].
General mobility terminology can be found in [9]. The following
additional terms, as defined in [7], are used in this document:
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Access Service Authorizer (ASA):
A network operator that authenticates a MN and establishes the
MN's authorization to receive Internet service.
Access Service Provider (ASP):
A network operator that provides direct IP packet forwarding to
and from the MN.
Mobility Service Authorizer (MSA):
A service provider that authorizes MIPv6 service.
Mobility Service Provider (MSP):
A service provider that provides MIPv6 service. In order to
obtain such service, the MN must be authenticated and authorized
to obtain the MIPv6 service.
Split scenario:
A scenario where the mobility service and the network access
service are authorized by different entities.
Integrated Scenario:
A scenario where the mobility service and the network access
service are authorized by the same entity.
Network Access Server (NAS):
A device that provides an access service for a user to a network.
Home AAA (HAAA):
An authentication, authorization and accounting server located in
user's home network.
3. Overview
This document addresses the authentication, authorization and
accounting functionality required by for the MIPv6 bootstrapping as
outlined in the MIPv6 bootstrapping problem statement document [7].
This document focuses on the Diameter based AAA functionality for the
NAS to HAAA interface.
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In the integrated scenario MIPv6 bootstrapping is provided as part of
the network access authentication procedure. Figure 1 shows the
participating entities. This document, however, only concentrates on
the NAS, possible local Diameter proxies and the home Diameter
server.
+---------------------------+ +-----------------+
|Access Service Provider | |ASA/MSA/(MSP) |
|(Mobility Service Provider)| | |
| | | |
| +--------+ | | +--------+ |
| |Local | Diameter | | |Home | |
| |Diameter|<---------------------->|Diameter| |
| |Proxy | | | |Server | |
| +--------+ | | +--------+ |
| ^ ^ | | ^ |
| | | | | | |
| | | | | | |
| Diameter | | v |
| | | +-------+ | | +-------+ |
| | | |Home | | | |Home | |
| | +-------->|Agent | | | |Agent | |
| | |in ASP | | | |in MSP | |
| v +-------+ | | +-------+ |
+-------+ IEEE | +-----------+ +-------+ | +-----------------+
|Mobile | 802.1X | |NAS/Relay | |DHCPv6 | |
|Node |------------|Diameter |---|Server | |
| | PANA,... | |Client | | | |
+-------+ DHCP | +-----------+ +-------+ |
+---------------------------+
Figure 1: Mobile IPv6 Bootstrapping in the Integrated Scenario
In a typical MIPv6 access scenario the MN is attached to an ASP's
network. During the network attachment procedure, the NAS/Diameter
client interacts with the MN.
During the time of authentication the Diameter server in the MSA
detects that the user is also authorized for MIPv6 access. Based on
the MSA's policy, the Diameter server may return several MIPv6
bootstrapping related parameters.
Depending on the details of the bootstrapping solution interaction
with the DHCPv6 server may be required, as described in [10].
However, the Diameter based NAS to HAAA interface described in this
document is not tied to DHCPv6 as the only possible MIPv6
bootstrapping method.
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4. Commands, AVPs and Advertising Application Support
This section describes command codes, defines AVPs and advertised
application identifiers for the Diameter MIPv6 bootstrapping in the
NAS to HAAA interface.
4.1. Advertising Application Support
Diameter nodes conforming to this specification MUST include the
value of 1 (NASREQ application) or 5 (EAP application) in the Auth-
Application-Id and the Acct-Application-Id AVP of the Capabilities-
Exchange-Request / Capabilities-Exchange-Answer commands [3].
4.2. Command Codes
This document re-uses the Diameter NASREQ application [4] and the EAP
application commands [5]. The following commands are used to carry
MIPv6 related bootstrapping AVPs:
Command-Name Abbrev. Code Reference Application
Diameter-EAP-Request DER 268 RFC 4072 EAP
Diameter-EAP-Answer DEA 268 RFC 4072 EAP
AA-Request AAR 265 RFC 4005 NASREQ
AA-Answer AAA 265 RFC 4005 NASREQ
Figure 2: MIPv6 Bootstrapping NAS to HAAA Interface Command Codes
When the Re-Auth-Request (RAR), Re-Auth-Answer (RAA), Session-
Termination-Request (STR), Session-Termination-Answer (STA), Abort-
Session-Request (ASR), Abort-Session-Answer (ASA), Accounting-Request
(ACR), and Accounting-Answer (ACA) commands are used together with
the MIPv6 bootstrapping NAS to HAAA interface, they follow the rules
in the Diameter NASREQ [5], EAP [4] and RFC 3588 [3] applications.
The accounting commands use the Application Identifier value of 3
(Diameter Base Accounting); the others use 0 (Diameter Common
Messages).
4.3. Diameter-EAP-Request (DER)
The Diameter-EAP-Request (DER) message [4], indicated by the Command-
Code field set to 268 and the 'R' bit set in the Command Flags field,
is sent by the NAS to the Diameter server to initiate a network
access authentication and authorization procedure. The DER message
format is the same as defined in [4]. The message MAY include
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optional MIPv6 bootstrapping AVPs:
<Diameter-EAP-Request> ::= < Diameter Header: 268, REQ, PXY >
< Session-Id >
{ Auth-Application-Id }
{ Origin-Host }
{ Origin-Realm }
{ Destination-Realm }
{ Auth-Request-Type }
* [ Mobility-Agent-Info ]
[ Mobility-Capability ]
[ Destination-Host ]
...
* [ AVP ]
4.4. Diameter-EAP-Answer (DEA)
The Diameter-EAP-Answer (DEA) message defined in [4], indicated by
the Command-Code field set to 268 and 'R' bit cleared in the Command
Flags field, is sent in response to the Diameter-EAP-Request message
(DER). If the network access authentication procedure was successful
then the response MAY include any set of bootstrapping AVPs.
The DEA message format is the same as defined in [4] with an addition
of optional MIPv6 bootstrapping AVPs:
<Diameter-EAP-Answer> ::= < Diameter Header: 268, PXY >
< Session-Id >
{ Auth-Application-Id }
{ Auth-Request-Type }
{ Result-Code }
{ Origin-Host }
{ Origin-Realm }
* [ Mobility-Agent-Info ]
[ Mobility-Capability ]
[ User-Name ]
...
* [ AVP ]
4.5. AA-Request (AAR)
The AA-Request (AAR) message [5], indicated by the Command-Code field
set to 265 and 'R' bit set in the Command Flags field, is sent by the
NAS to the Diameter server to initiate a network access
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authentication and authorization procedure. The AAR message format
is the same as defined in [5]. The message MAY include optional
MIPv6 bootstrapping AVPs:
<AA-Request> ::= < Diameter Header: 265, REQ, PXY >
< Session-Id >
{ Auth-Application-Id }
{ Origin-Host }
{ Origin-Realm }
{ Destination-Realm }
{ Auth-Request-Type }
* [ Mobility-Agent-Info ]
[ Mobility-Capability ]
[ Destination-Host ]
...
* [ AVP ]
4.6. AA-Answer (AAA)
The AA-Answer (AAA) message, indicated by the Command-Code field set
to 265 and 'R' bit cleared in the Command Flags field is sent in
response to the AA-Request (AAR) message for confirmation of the
result of MIPv6 HA bootstrapping. If the network access
authentication procedure was successful then the response MAY include
any set of bootstrapping AVPs.
The AAA message format is the same as defined in [5] with an addition
of optional MIPv6 bootstrapping AVPs:
<AA-Answer> ::= < Diameter Header: 265, PXY >
< Session-Id >
{ Auth-Application-Id }
{ Auth-Request-Type }
{ Result-Code }
{ Origin-Host }
{ Origin-Realm }
* [ Mobility-Agent-Info ]
[ Mobility-Capability ]
[ User-Name ]
...
* [ AVP ]
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4.7. Attribute Value Pair Definitions
4.7.1. Mobility-Agent-Info
The Mobility-Agent-Info AVP (AVP code TBD) is type of Grouped and
contains necessary information to assign a HA to the MN. When the
Mobility-Agent-Info AVP is present in a message, it MUST contain
either a MIP6-Home-Agent-Address AVP or a MIP6-Home-Agent-FQDN AVP,
but not both. The grouped AVP has the following grammar:
<Mobility-Agent-Info> ::= < AVP Header: TBD >
[ MIP6-Home-Agent-Address ]
[ MIP6-Home-Agent-FQDN ]
* [ AVP ]
4.7.2. MIP6-Home-Agent-Address AVP
The MIP6-Home-Agent-Address AVP (AVP Code TBD) is of type Address
(see Section 4.3 in [3]) and contains the HA address. The Diameter
server MAY decide to assign a HA to the MN that is in close proximity
to the point of attachment (e.g., determined by the NAS-Identifier
AVP). There may be other reasons for dynamically assigning HAs to
the MN, for example to share the traffic load.
This AVP MAY also be attached by the NAS when sent to the Diameter
server in a request message as a hint of a locally assigned HA
address.
4.7.3. MIP6-Home-Agent-FQDN AVP
The MIP6-Home-Agent-FQDN AVP (AVP Code TBD) is of type UTF8String and
contains the FQDN of a HA. The usage of this AVP is equivalent to
the MIP6-Home-Agent-Address AVP but offers an additional level of
indirection via the DNS infrastructure.
4.7.4. Mobility-Capability AVP
The Mobility-Capability AVP (AVP Code TBD) is of type Unsigned64 and
contains a 64 bits flags field of supported capabilities of the NAS/
ASP. Sending and receiving the Mobility-Capability AVP with value 0
MUST be supported.
The NAS MAY include this AVP to indicate capabilities of the NAS/ASP
to the Diameter server. For example, the NAS may indicate that a
local home agent can be provided. Similarly, the Diameter server MAY
include this AVP to inform the NAS/ASP about which of the NAS/ASP
indicated capabilities are supported or authorized by the ASA/MSA(/
MSP).
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The following capabilities are defined in this document:
MOBILITY_CAPABILITY (0x0000000000000000)
The Mobility-Capability AVP MAY contain value 0 (zero) with the
semantics that are defined in this document for the Mobile IPv6
bootstrapping functionality. This 'zero' flag is always
implicitly set when the Mobility-Capability AVP is used.
LOCAL_HOME_AGENT_ASSIGNMENT (0x0000000000000001)
This flag is set by the NAS/ASP when a local home agent can be
assigned to the MN. This flag is set by the ASA/MSA(/MSP) when
the use of a local HA is authorized.
5. Example Message Flows
5.1. EAP-based Authentication
This section shows basic message flows of MIPv6 integrated scenario
bootstrapping and dynamic HA assignment. In Figure 3 network access
authentication is based on EAP (e.g., 802.11i/802.1X). The NAS
informs the home Diameter server that it wishes to provide a locally
assigned HA to the visiting MN. The Diameter server assigns the MN a
HA in the home MSP but also authorizes the assignment of local HA for
the ASP. The Diameter server then replies to the NAS with HA related
bootstrapping information. Whether the NAS/ASP then offers a locally
assigned HA or the MSP assigned HA to the MN is based on the local
ASP policy.
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NAS Home server
| |
| Diameter-EAP-Request |
| Mobility-Capability=LOCAL_HOME_AGENT_ASSIGNMENT |
| Auth-Request-Type=AUTHORIZE_AUTHENTICATE |
| EAP-Payload(EAP Start) |
|---------------------------------------------------------------->|
| |
| |
: ...more EAP Request/Response pairs... :
| |
| |
| Diameter-EAP-Answer |
| Mobility-Agent-Info{ |
| MIP6-Home-Agent-Address(IPv6 address) |
| MIP6-Home-Agent-FQDN=ha.example.com } |
| Mobility-Capability=LOCAL_HOME_AGENT_ASSIGNMENT |
| Result-Code=DIAMETER_SUCCESS |
| EAP-Payload(EAP Success) |
| EAP-Master-Session-Key |
| (authorization AVPs) |
| ... |
|<----------------------------------------------------------------|
| |
Figure 3: Diameter EAP Application with MIPv6 bootstrapping
5.2. Integrated Scenario and HA Allocation in MSP
Diameter is used to authenticate and authorize the MN for the
mobility service, and to send information about the allocated HA to
the NAS. In this example scenario the MN uses DHCP for its IP
address configuration.
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|
--------------ASP------>|<--ASA/MSA/(MSP)--
|
+----+ +--------+ +-------+ +--------+
| | |Diameter| | | | |
| | | Client | | | | |
| MN | | NAS/ | | DHCP | | Home |
| | | DHCP | | Server| |Diameter|
| | | Relay | | | | Server |
+-+--+ +----+---+ +---+---+ +--------+
| | | |
| 1 | 2 | |
|<------------->|<----------------------->|
| | | |
| | | |
| 3 | | |
|-------------->| | |
| | | |
| | 4 | |
| |------------>| |
| | | |
| | 5 | |
| |<------------| |
| | | |
| 6 | | |
|<--------------| | |
| | | |
Figure 4: Mobile IPv6 Integrated Scenario Bootstrapping and the
allocation of HAs either in the ASP or in the MSP
1) The MN executes the normal network access authentication procedure
(IEEE 802.11i/802.1X, PANA, ...) with the NAS. The NAS acts as an
authenticator in "pass-through" mode. The other endpoint of the
authentication dialogue is the MN's home Diameter server. This is
a typical scenario for network access authentication using EAP
methods. The NAS includes at least one of the NAS to HAAA
interface AVPs in the DER or in the AAR messages to indicate MIPv6
bootstrapping capability. For example, the NAS could include the
Mobility-Capability AVP with a value 0.
2) Depending on the Diameter server configuration and the user's
subscription profile, the Mobility-Agent-Info AVP and/or the
Mobility-Capability AVP may be carried in the DEA, assuming the
home Diameter server has allocated a HA to the MN. In case the
MIP6-Home-Agent-FQDN AVP was returned within the Mobility-Agent-
Info grouped AVP the MN ultimately needs to perform a DNS query in
order to discover the HA's IP address. For example, the home
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Diameter server could return the following AVPs:
o Mobility-Agent-Info grouped AVP containing:
* MIP6-Home-Agent-Address = 2001:db8:6000:302::1/64
* MIP6-Home-Agent-FQDN = ha.example.com
3) the MN sends a DHCPv6 Information Request message to
all_DHCP_Relay_Agents_and_Servers address. In the OPTION_ORO,
Option Code for the Home Network Identifier Option shall be
included in that message [10]. The Home Network Identifier Option
should have id-type of 1, the message is a request to discover
home network information that pertains to the given realm, i.e.,
the user's home domain (identified by the NAI of the MN). The
OPTION_CLIENTID is set by the MN to identify itself to the DHCP
server.
Steps 4 to 6 are not relevant from the NAS to HAAA Diameter interface
point of view and are not described in this document. The reader
should consult [10] for a detailed description about the rest of the
integrated scenario bootstrapping procedure.
5.3. Integrated Scenario and HA Allocation in ASP
This scenario is similar to the one described in Section 5.2 and
illustrated in Figure 4. There are slight differences in steps 2)
and 3).
2) The NAS/ASP wishes to allocate a local HA to the visiting MN. The
NAS/ASP will also inform the Diameter server about the HA address
it has assigned to the visiting MN (e.g., 2001:db8:1:c020::1). In
this case the NAS includes the following AVPs in the DER or in the
AAR messages:
o Mobility-Capability = LOCAL_HOME_AGENT_ASSIGNMENT
o Mobility-Agent-Info grouped AVP containing:
* MIP6-Home-Agent-Address = 2001:db8:1:c020::1
Depending on the Diameter server configuration and user's
subscription profile, the Diameter server either accepts or
rejects the proposal of locally allocated HA in the NAS/ASP. If
the Diameter server accepts the proposal then the Mobility-
Capability AVP with LOCAL_HOME_AGENT_ASSIGNMENT bit set is
returned back to the NAS. On the other hand if the Diameter
server does not accept locally assigned HA, the Diameter returns
the Mobility-Capability AVP with LOCAL_HOME_AGENT_ASSIGNMENT bit
unset. The Diameter server assigns a HA to the MN (e.g., 2001:
db8:6000::1) in the ASA/MSA/(MSP) and returns the IP address back
to the NAS/ASP. In a case the home Diameter server accepted the
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NAS/ASP proposal of local HA the home Diameter server would
return, for example, the following AVPs:
o Mobility-Capability = LOCAL_HOME_AGENT_ASSIGNMENT
o Mobility-Agent-Info grouped AVP containing:
* MIP6-Home-Agent-Address = 2001:db8:6000::1
3) The type-id field in the Home Network Identifier Option is set to
zero, indicating that a HA is requested in the ASP instead of in
the MSP. Depending on the result of the phase 2) the DHCP relay
agent places in the OPTION_MIP6-RELAY-Option either the locally
allocated HA information or the HA information that was returned
(proposed) by home Diameter server. The selection of local or
home allocated HAs in based on the local policy in the ASP. It is
also possible that both local and home allocated HAs are available
for the MN. The policy and heuristics when to select the local HA
and when the home HA are outside of this specification.
6. AVP Occurrence Tables
6.1. AAR, AAA, DER and DEA Commands AVP Table
The following table lists the additional MIPv6 bootstrapping NAS to
HAAA interface AVPs that may optionally be present in the AAR and AAA
Commands [5] or in the DER and DEA Commands [4].
+-----------------------+
| Command-Code |
|-----+-----+-----+-----+
Attribute Name | AAR | AAA | DER | DEA |
-------------------------------|-----+-----|-----+-----+
Mobility-Agent-Info | 0+ | 0+ | 0+ | 0+ |
Mobility-Capability | 0-1 | 0-1 | 0-1 | 0-1 |
+-----+-----+-----+-----+
Figure 5: AAR, AAA, DER and DEA Commands AVP Table
7. MIPv6 Bootstrapping NAS to HAAA Interface AVPs
This section defines AVPs that are specific to Diameter MIPv6
bootstrapping NAS to HAAA interface and MAY be included in the
Diameter EAP [4] and the NASREQ [5] application messages. The
Diameter AVP rules are defined in the Diameter Base [3], Section 4.
These AVP rules are observed in AVPs defined in this section.
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The following table describes the Diameter AVPs, their AVP Code
values, types, possible flag values, and whether the AVP MAY be
encrypted. The Diameter base [3] specifies the AVP Flag rules for
AVPs in Section 4.5.
+---------------------+
| AVP Flag rules |
+----+-----+----+-----+----+
AVP Section | | |SHLD|MUST | |
Attribute Name Code Defined Data Type |MUST| MAY |NOT |NOT |Encr|
------------------------------------------+----+-----+----+-----+----+
Mobility- | | | | | |
Agent-Info TBD 4.7.1 Grouped | | P | | M,V | Y |
MIP6-Home-Agent- | | | | | |
Address TBD 4.7.2 Address | | P | | M,V | Y |
MIP6-Home-Agent- | | | | | |
FQDN TBD 4.7.3 UTF8String | | P | | M,V | Y |
Mobility- | | | | | |
Capability TBD 4.7.4 Unsigned64 | | P | | M,V | Y |
------------------------------------------+----+-----+----+-----+----+
Figure 6: AVP Flag Rules Table
8. IANA Considerations
8.1. Registration of new AVPs
This specification defines the following new AVPs:
Mobility-Agent-Info is set to TBD
MIP6-Home-Agent-Address is set to TBD
MIP6-Home-Agent-FQDN is set to TBD
Mobility-Capability is set to TBD
8.2. New Registry: Mobility Capability
IANA is requested to create a new registry for the Mobility
Capability as described in Section 4.7.4.
Token | Value | Description
----------------------------------+----------------------+------------
MOBILITTY_CAPABILITY | 0x0000000000000000 | [RFC TBD]
LOCAL_HOME_AGENT_ASSIGNMENT | 0x0000000000000001 | [RFC TBD]
Available for Assignment via IANA | 2^x |
Allocation rule: Only numeric values that are 2^x (power of two) are
allowed based on the allocation policy described below.
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Following the policies outlined in [1] new values with a description
of their semantic for usage with the Mobility-Capability AVP together
with a Token will be assigned after Expert Review initiated by the
O&M Area Directors in consultation with the DIME working group chairs
or the working group chairs of a designated successor working group.
Updates can be provided based on expert approval only. A designated
expert will be appointed by the O&M Area Directors. No mechanism to
mark entries as "deprecated" is envisioned. Based on expert approval
it is possible to delete entries from the registry.
9. Security Considerations
The security considerations for the Diameter interaction required to
accomplish the integrated scenario are described in [10].
Additionally, the security considerations of the Diameter base
protocol [3], Diameter NASREQ application [5] / Diameter EAP [4]
application (with respect to network access authentication and the
transport of keying material) are applicable to this document. This
document does not introduce new security vulnerabilities.
10. Acknowledgements
This document is heavily based on the ongoing work for RADIUS MIPv6
interaction. Hence, credits go to respective authors for their work
with draft-ietf-mip6-radius. Furthermore, the author would like to
thank the authors of draft-le-aaa-diameter-mobileipv6 (Franck Le,
Basavaraj Patil, Charles E. Perkins, Stefano Faccin) for their work
in context of MIPv6 Diameter interworking. Their work influenced
this document. Julien Bournelle would like to thank GET/INT since he
began to work on this document while he was in their employ. Authors
would also like to acknowledge Raymond Hsu for his valuable feedback
on local HA assignment and Wolfgang Fritsche for his thorough review.
11. References
11.1. Normative References
[1] Johnson, D., Perkins, C., and J. Arkko, "Mobility Support in
IPv6", RFC 3775, June 2004.
[2] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
[3] Calhoun, P., Loughney, J., Guttman, E., Zorn, G., and J. Arkko,
"Diameter Base Protocol", RFC 3588, September 2003.
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[4] Eronen, P., Hiller, T., and G. Zorn, "Diameter Extensible
Authentication Protocol (EAP) Application", RFC 4072,
August 2005.
[5] Calhoun, P., Zorn, G., Spence, D., and D. Mitton, "Diameter
Network Access Server Application", RFC 4005, August 2005.
11.2. Informative References
[6] Giaretta, G., "Mobile IPv6 bootstrapping in split scenario",
draft-ietf-mip6-bootstrapping-split-04 (work in progress),
December 2006.
[7] Patel, A. and G. Giaretta, "Problem Statement for bootstrapping
Mobile IPv6 (MIPv6)", RFC 4640, September 2006.
[8] Giaretta, G., "AAA Goals for Mobile IPv6",
draft-ietf-mip6-aaa-ha-goals-03 (work in progress),
September 2006.
[9] Manner, J. and M. Kojo, "Mobility Related Terminology",
RFC 3753, June 2004.
[10] Chowdhury, K. and A. Yegin, "MIP6-bootstrapping for the
Integrated Scenario",
draft-ietf-mip6-bootstrapping-integrated-dhc-02 (work in
progress), February 2007.
Authors' Addresses
Jouni Korhonen
TeliaSonera
Teollisuuskatu 13
Sonera FIN-00051
Finland
Email: jouni.korhonen@teliasonera.com
Julien Bournelle
France Telecom R&D
38-4O rue du general Leclerc
Issy-Les-Moulineaux 92794
France
Email: julien.bournelle@orange-ftgroup.com
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Hannes Tschofenig
Nokia Siemens Networks
Otto-Hahn-Ring 6
Munich, Bavaria 81739
Germany
Email: Hannes.Tschofenig@nsn.com
URI: http://www.tschofenig.com
Charles E. Perkins
Nokia Siemens Networks
313 Fairchild Drive
Mountain View CA 94043
US
Phone: +1 650 625-2986
Email: charliep@nsn.com
Kuntal Chowdhury
Starent Networks
30 International Place
Tewksbury MA 01876
US
Phone: +1 214 550 1416
Email: kchowdhury@starentnetworks.com
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