Internet Engineering Task Force E. Jankiewicz
Internet-Draft SRI International, Inc.
Obsoletes: 4294 (if approved) J. Loughney
Intended status: Informational Nokia
Expires: November 24, 2011 T. Narten
IBM Corporation
May 23, 2011
IPv6 Node Requirements
draft-ietf-6man-node-req-bis-10.txt
Abstract
This document defines requirements for IPv6 nodes. It is expected
that IPv6 will be deployed in a wide range of devices and situations.
Specifying the requirements for IPv6 nodes allows IPv6 to function
well and interoperate in a large number of situations and
deployments.
This document obsoletes RFC4294.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 24, 2011.
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
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material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
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Table of Contents
1. Requirements Language . . . . . . . . . . . . . . . . . . . . 5
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Scope of This Document . . . . . . . . . . . . . . . . . . 6
2.2. Description of IPv6 Nodes . . . . . . . . . . . . . . . . 6
3. Abbreviations Used in This Document . . . . . . . . . . . . . 6
4. Sub-IP Layer . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. IP Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1. Internet Protocol Version 6 - RFC 2460 . . . . . . . . . . 8
5.2. Neighbor Discovery for IPv6 - RFC 4861 . . . . . . . . . . 8
5.3. Default Router Preferences and More-Specific Routes -
RFC 4191 . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4. SEcure Neighbor Discovery (SEND) - RFC 3971 . . . . . . . 10
5.5. IPv6 Router Advertisement Flags Option - RFC 5175 . . . . 10
5.6. Path MTU Discovery and Packet Size . . . . . . . . . . . . 10
5.6.1. Path MTU Discovery - RFC 1981 . . . . . . . . . . . . 10
5.7. IPv6 Jumbograms - RFC 2675 . . . . . . . . . . . . . . . . 11
5.8. ICMP for the Internet Protocol Version 6 (IPv6) - RFC
4443 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.9. Addressing . . . . . . . . . . . . . . . . . . . . . . . . 11
5.9.1. IP Version 6 Addressing Architecture - RFC 4291 . . . 11
5.9.2. IPv6 Stateless Address Autoconfiguration - RFC 4862 . 11
5.9.3. Privacy Extensions for Address Configuration in
IPv6 - RFC 4941 . . . . . . . . . . . . . . . . . . . 12
5.9.4. Default Address Selection for IPv6 - RFC 3484 . . . . 12
5.9.5. Stateful Address Autoconfiguration - RFC 3315 . . . . 13
5.10. Multicast Listener Discovery (MLD) for IPv6 . . . . . . . 13
6. DHCP vs. Router Advertisement Options for Host
Configuration . . . . . . . . . . . . . . . . . . . . . . . . 14
7. DNS and DHCP . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1. DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2. Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
- RFC 3315 . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2.1. Other Configuration Information . . . . . . . . . . . 15
7.2.2. Use of Router Advertisements in Managed
Environments . . . . . . . . . . . . . . . . . . . . . 15
7.3. IPv6 Router Advertisement Options for DNS
Configuration - RFC 6106 . . . . . . . . . . . . . . . . . 15
8. IPv4 Support and Transition . . . . . . . . . . . . . . . . . 16
8.1. Transition Mechanisms . . . . . . . . . . . . . . . . . . 16
8.1.1. Basic Transition Mechanisms for IPv6 Hosts and
Routers - RFC 4213 . . . . . . . . . . . . . . . . . . 16
9. Application Support . . . . . . . . . . . . . . . . . . . . . 16
9.1. Textual Representation of IPv6 Addresses - RFC 5952 . . . 16
9.2. Application Program Interfaces (APIs) . . . . . . . . . . 16
10. Mobility . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
11. Security . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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11.1. Requirements . . . . . . . . . . . . . . . . . . . . . . . 18
11.2. Transforms and Algorithms . . . . . . . . . . . . . . . . 19
12. Router-Specific Functionality . . . . . . . . . . . . . . . . 19
12.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 19
12.1.1. IPv6 Router Alert Option - RFC 2711 . . . . . . . . . 19
12.1.2. Neighbor Discovery for IPv6 - RFC 4861 . . . . . . . . 19
13. Network Management . . . . . . . . . . . . . . . . . . . . . . 19
13.1. Management Information Base Modules (MIBs) . . . . . . . . 20
13.1.1. IP Forwarding Table MIB . . . . . . . . . . . . . . . 20
13.1.2. Management Information Base for the Internet
Protocol (IP) . . . . . . . . . . . . . . . . . . . . 20
14. Security Considerations . . . . . . . . . . . . . . . . . . . 20
15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20
16. Authors and Acknowledgments . . . . . . . . . . . . . . . . . 20
16.1. Authors and Acknowledgments (Current Document) . . . . . . 20
16.2. Authors and Acknowledgments From RFC 4279 . . . . . . . . 20
17. Appendix: Changes from One ID version to Another . . . . . . . 21
17.1. Appendix: Changes from -09 to -10 . . . . . . . . . . . . 21
17.2. Appendix: Changes from -08 to -09 . . . . . . . . . . . . 22
17.3. Appendix: Changes from -07 to -08 . . . . . . . . . . . . 22
17.4. Appendix: Changes from -06 to -07 . . . . . . . . . . . . 22
17.5. Appendix: Changes from -05 to -06 . . . . . . . . . . . . 23
17.6. Appendix: Changes from -04 to -05 . . . . . . . . . . . . 23
17.7. Appendix: Changes from -03 to -04 . . . . . . . . . . . . 23
18. Appendix: Changes from RFC 4294 . . . . . . . . . . . . . . . 23
19. References . . . . . . . . . . . . . . . . . . . . . . . . . . 24
19.1. Normative References . . . . . . . . . . . . . . . . . . . 24
19.2. Informative References . . . . . . . . . . . . . . . . . . 27
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 30
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1. Requirements Language
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 RFC 2119 [RFC2119].
2. Introduction
This document defines common functionality required from both IPv6
hosts and routers. Many IPv6 nodes will implement optional or
additional features, but this document collects and summarizes
requirements from other published Standards Track documents in one
place.
This document tries to avoid discussion of protocol details, and
references RFCs for this purpose. This document is intended to be an
Applicability Statement and provide guidance as to which IPv6
specifications should be implemented in the general case, and which
specification may be of interest to specific deployment scenarios.
This document does not update any individual protocol document RFCs.
Although the document points to different specifications, it should
be noted that in many cases, the granularity of a particular
requirement will be smaller than a single specification, as many
specifications define multiple, independent pieces, some of which may
not be mandatory. In addition, most specifications define both
client and server behavior in the same specification, while many
implementations will be focused on only one of those roles.
This document defines a minimal level of requirement needed for a
device to provide useful internet service and considers a broad range
of device types and deployment scenarios. Because of the wide range
of deployment scenarios, the minimal requirements specified in this
document may not be sufficient for all deployment scenarios. It is
perfectly reasonable (and indeed expected) for other profiles to
define additional or stricter requirements appropriate for specific
usage and deployment environments. For example, this document does
not mandate that all clients support DHCP, but some deployment
scenarios may deem it appropriate to make such a requirement. For
example, government agencies in the USA have defined profiles for
specialized requirements for IPv6 in target environments [DODv6] and
[USGv6].
As it is not always possible for an implementer to know the exact
usage of IPv6 in a node, an overriding requirement for IPv6 nodes is
that they should adhere to Jon Postel's Robustness Principle:
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Be conservative in what you do, be liberal in what you accept from
others [RFC0793].
2.1. Scope of This Document
IPv6 covers many specifications. It is intended that IPv6 will be
deployed in many different situations and environments. Therefore,
it is important to develop the requirements for IPv6 nodes to ensure
interoperability.
This document assumes that all IPv6 nodes meet the minimum
requirements specified here.
2.2. Description of IPv6 Nodes
From the Internet Protocol, Version 6 (IPv6) Specification [RFC2460],
we have the following definitions:
Description of an IPv6 Node
- a device that implements IPv6.
Description of an IPv6 router
- a node that forwards IPv6 packets not explicitly addressed to
itself.
Description of an IPv6 Host
- any node that is not a router.
3. Abbreviations Used in This Document
ATM Asynchronous Transfer Mode
AH Authentication Header
DAD Duplicate Address Detection
ESP Encapsulating Security Payload
ICMP Internet Control Message Protocol
IKE Internet Key Exchange
MIB Management Information Base
MLD Multicast Listener Discovery
MTU Maximum Transfer Unit
NA Neighbor Advertisement
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NBMA Non-Broadcast Multiple Access
ND Neighbor Discovery
NS Neighbor Solicitation
NUD Neighbor Unreachability Detection
PPP Point-to-Point Protocol
PVC Permanent Virtual Circuit
SVC Switched Virtual Circuit
4. Sub-IP Layer
An IPv6 node must include support for one or more IPv6 link-layer
specifications. Which link-layer specifications an implementation
should include will depend upon what link-layers are supported by the
hardware available on the system. It is possible for a conformant
IPv6 node to support IPv6 on some of its interfaces and not on
others.
As IPv6 is run over new layer 2 technologies, it is expected that new
specifications will be issued. In the following, we list some of the
link-layers for which an IPv6 specification has been developed. It
is provided for information purposes only, and may not be complete.
- Transmission of IPv6 Packets over Ethernet Networks [RFC2464]
- IPv6 over ATM Networks [RFC2492]
- Transmission of IPv6 Packets over Frame Relay Networks
Specification [RFC2590]
- Transmission of IPv6 Packets over IEEE 1394 Networks [RFC3146]
- Transmission of IPv6, IPv4, and Address Resolution Protocol (ARP)
Packets over Fibre Channel [RFC4338]
- Transmission of IPv6 Packets over IEEE 802.15.4 Networks [RFC4944]
- Transmission of IPv6 via the IPv6 Convergence Sublayer over IEEE
802.16 Networks [RFC5121]
- IP version 6 over PPP [RFC5072]
In addition to traditional physical link-layers, it is also possible
to tunnel IPv6 over other protocols. Examples include:
- Teredo: Tunneling IPv6 over UDP through Network Address
Translations (NATs) [RFC4380]
- Section 3 of "Basic IPv6 Transition Mechanisms" [RFC4213]
5. IP Layer
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5.1. Internet Protocol Version 6 - RFC 2460
The Internet Protocol Version 6 is specified in [RFC2460]. This
specification MUST be supported.
Any unrecognized extension headers or options MUST be processed as
described in RFC 2460.
The node MUST follow the packet transmission rules in RFC 2460.
Nodes MUST always be able to send, receive, and process fragment
headers. All conformant IPv6 implementations MUST be capable of
sending and receiving IPv6 packets; the forwarding functionality MAY
be supported. Overlapping fragments MUST be handled as described in
[RFC5722].
RFC 2460 specifies extension headers and the processing for these
headers.
An IPv6 node MUST be able to process these headers. An exception is
Routing Header type 0 (RH0) which was deprecated by [RFC5095] due to
security concerns, and which MUST be treated as an unrecognized
routing type.
5.2. Neighbor Discovery for IPv6 - RFC 4861
Neighbor Discovery is defined in [RFC4861] and was updated by
[RFC5942]. Neighbor Discovery SHOULD be supported. RFC4861 states:
Unless specified otherwise (in a document that covers operating IP
over a particular link type) this document applies to all link
types. However, because ND uses link-layer multicast for some of
its services, it is possible that on some link types (e.g., NBMA
links) alternative protocols or mechanisms to implement those
services will be specified (in the appropriate document covering
the operation of IP over a particular link type). The services
described in this document that are not directly dependent on
multicast, such as Redirects, Next-hop determination, Neighbor
Unreachability Detection, etc., are expected to be provided as
specified in this document. The details of how one uses ND on
NBMA links is an area for further study.
Some detailed analysis of Neighbor Discovery follows:
Router Discovery is how hosts locate routers that reside on an
attached link. Hosts MUST support Router Discovery functionality.
Prefix Discovery is how hosts discover the set of address prefixes
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that define which destinations are on-link for an attached link.
Hosts MUST support Prefix discovery.
Hosts MUST also implement Neighbor Unreachability Detection (NUD) for
all paths between hosts and neighboring nodes. NUD is not required
for paths between routers. However, all nodes MUST respond to
unicast Neighbor Solicitation (NS) messages.
Hosts MUST support the sending of Router Solicitations and the
receiving of Router Advertisements. The ability to understand
individual Router Advertisement options is dependent on supporting
the functionality making use of the particular option.
All nodes MUST support the Sending and Receiving of Neighbor
Solicitation (NS) and Neighbor Advertisement (NA) messages. NS and
NA messages are required for Duplicate Address Detection (DAD).
Hosts SHOULD support the processing of Redirect functionality.
Routers MUST support the sending of Redirects, though not necessarily
for every individual packet (e.g., due to rate limiting). Redirects
are only useful on networks supporting hosts. In core networks
dominated by routers, redirects are typically disabled. The sending
of redirects SHOULD be disabled by default on backbone routers. They
MAY be enabled by default on routers intended to support hosts on
edge networks.
"IPv6 Host-to-Router Load Sharing" [RFC4311] includes additional
recommendations on how to select from a set of available routers.
RFC 4311 SHOULD be supported.
5.3. Default Router Preferences and More-Specific Routes - RFC 4191
"Default Router Preferences and More-Specific Routes" [RFC4191]
provides support for nodes attached to multiple (different) networks
each providing routers that advertise themselves as default routers
via Router Advertisements. In some scenarios, one router may provide
connectivity to destinations the other router does not and choosing
the "wrong" default router can result in reachability failures. In
such cases, RFC4191 can help.
Small Office/Home Office (SOHO) deployments supported by routers
adhering to [RFC6204], use [RFC4191] to advertise routes to certain
local destinations. Consequently, nodes that will be deployed in
SOHO environments SHOULD implement [RFC4191].
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5.4. SEcure Neighbor Discovery (SEND) - RFC 3971
SEND [RFC3971] and Cryptographically Generated Address (CGA)
[RFC3972] provide a way to secure the message exchanges of Neighbor
Discovery. SEND is a new technology, in that it has no IPv4
counterpart but it has significant potential to address certain
classes of spoofing attacks. While there have been some
implementations of SEND, there has been only limited deployment
experience to date in using the technology. In addition, the IETF
working group Cga & Send maIntenance (csi) is currently working on
additional extensions intended to make SEND more attractive for
deployment.
At this time, SEND is considered optional and IPv6 nodes MAY provide
SEND functionality.
5.5. IPv6 Router Advertisement Flags Option - RFC 5175
Router Advertisements include an 8-bit field of single-bit Router
Advertisement flags. The Router Advertisement Flags Option extends
the number of available flag bits by 48 bits. At the time of this
writing, 6 of the original 8 bit flags have been assigned, while 2
remain available for future assignment. No flags have been defined
that make use of the new option, and thus strictly speaking, there is
no requirement to implement the option today. However,
implementations that are able to pass unrecognized options to a
higher level entity that may be able to understand them (e.g., a
user-level process using a "raw socket" facility), MAY take steps to
handle the option in anticipation of a future usage.
5.6. Path MTU Discovery and Packet Size
5.6.1. Path MTU Discovery - RFC 1981
"Path MTU Discovery" [RFC1981] SHOULD be supported. From [RFC2460]:
It is strongly recommended that IPv6 nodes implement Path MTU
Discovery [RFC1981], in order to discover and take advantage of
path MTUs greater than 1280 octets. However, a minimal IPv6
implementation (e.g., in a boot ROM) may simply restrict itself to
sending packets no larger than 1280 octets, and omit
implementation of Path MTU Discovery.
The rules in [RFC2460] and [RFC5722] MUST be followed for packet
fragmentation and reassembly.
One operational issue with Path MTU discovery occurs when firewalls
block ICMP Packet Too Big messages. Path MTU discovery relies on
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such messages to determine what size messages can be successfully
sent. Packetization Layer Path MTU Discovery [RFC4821] avoids having
a dependency on Packet Too Big messages.
5.7. IPv6 Jumbograms - RFC 2675
IPv6 Jumbograms [RFC2675] are an optional extension that allow the
sending of IP datagrams larger than 65.535 bytes. IPv6 Jumbograms
make use of IPv6 hop-by-hop options and are only suitable on paths in
which every hop and link are capable of supporting Jumbograms (e.g.,
within a campus or datacenter). To date, few implementations exist
and there is essentially no reported experience from usage.
Consequently, IPv6 Jumbograms [RFC2675] remain optional at this time.
5.8. ICMP for the Internet Protocol Version 6 (IPv6) - RFC 4443
ICMPv6 [RFC4443] MUST be supported. "Extended ICMP to Support Multi-
Part Messages" [RFC4884] MAY be supported.
5.9. Addressing
5.9.1. IP Version 6 Addressing Architecture - RFC 4291
The IPv6 Addressing Architecture [RFC4291] MUST be supported.
5.9.2. IPv6 Stateless Address Autoconfiguration - RFC 4862
Hosts MUST support IPv6 Stateless Address Autoconfiguration as
defined in [RFC4862]. Static address may be supported as well.
Nodes that are routers MUST be able to generate link local addresses
as described in RFC 4862 [RFC4862].
From 4862:
The autoconfiguration process specified in this document applies
only to hosts and not routers. Since host autoconfiguration uses
information advertised by routers, routers will need to be
configured by some other means. However, it is expected that
routers will generate link-local addresses using the mechanism
described in this document. In addition, routers are expected to
successfully pass the Duplicate Address Detection procedure
described in this document on all addresses prior to assigning
them to an interface.
All nodes MUST implement Duplicate Address Detection. Quoting from
Section 5.4 of RFC 4862:
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Duplicate Address Detection MUST be performed on all unicast
addresses prior to assigning them to an interface, regardless of
whether they are obtained through stateless autoconfiguration,
DHCPv6, or manual configuration, with the following [exceptions
noted therein].
"Optimistic Duplicate Address Detection (DAD) for IPv6" [RFC4429]
specifies a mechanism to reduce delays associated with generating
addresses via stateless address autoconfiguration [RFC4862]. RFC
4429 was developed in conjunction with Mobile IPv6 in order to reduce
the time needed to acquire and configure addresses as devices quickly
move from one network to another, and it is desirable to minimize
transition delays. For general purpose devices, RFC 4429 is not
considered to be necessary at this time.
5.9.3. Privacy Extensions for Address Configuration in IPv6 - RFC 4941
Privacy Extensions for Stateless Address Autoconfiguration [RFC4941]
addresses a specific problem involving a client device whose user is
concerned about its activity or location being tracked. The problem
arises both for a static client and for one that regularly changes
its point of attachment to the Internet. When using Stateless
Address Autoconfiguration [RFC4862], the Interface Identifier portion
of formed addresses stays constant and is globally unique. Thus,
although a node's global IPv6 address will change if it changes its
point of attachment, the Interface Identifier portion of those
addresses remain the same, making it possible for servers to track
the location of an individual device as it moves around, or its
pattern of activity if it remains in one place. This may raise
privacy concerns as described in [RFC4862].
In such situations, RFC4941 SHOULD be implemented. In other cases,
such as with dedicated servers in a data center, RFC4941 provides
limited or no benefit.
Implementers of "RFC4941 should be aware that certain addresses are
reserved and should not be chosen for use as temporary addresses.
Consult "Reserved IPv6 Interface Identifiers" [RFC5453] for more
details.
5.9.4. Default Address Selection for IPv6 - RFC 3484
The rules specified in the Default Address Selection for IPv6
[RFC3484] document MUST be implemented. IPv6 nodes will need to deal
with multiple addresses configured simultaneously.
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5.9.5. Stateful Address Autoconfiguration - RFC 3315
DHCPv6 [RFC3315] can be used to obtain and configure addresses. In
general, a network may provide for the configuration of addresses
through Router Advertisements, DHCPv6 or both. There will be a wide
range of IPv6 deployment models and differences in address assignment
requirements, some of which may require DHCPv6 for address
assignment. Consequently all hosts SHOULD implement address
configuration via DHCPv6.
In the absence of a router, IPv6 nodes using DHCP for address
assignment MAY initiate DHCP to obtain IPv6 addresses and other
configuration information, as described in Section 5.5.2 of
[RFC4862].
5.10. Multicast Listener Discovery (MLD) for IPv6
Nodes that need to join multicast groups MUST support MLDv1
[RFC2710]. MLDv1 is needed by any node that is expected to receive
and process multicast traffic. Note that Neighbor Discovery (as used
on most link types -- see Section 5.2) depends on multicast and
requires that nodes join Solicited Node multicast addresses.
MLDv2 [RFC3810] extends the functionality of MLDv1 by supporting
Source-Specific Multicast. The original MLDv2 protocol [RFC3810]
supporting Source-Specific Multicast [RFC4607] supports two types of
"filter modes". Using an INCLUDE filter, a node indicates a
multicast group along with a list of senders for that group it wishes
to receive traffic from. Using an EXCLUDE filter, a node indicates a
multicast group along with a list of senders it wishes to exclude
receiving traffic from. In practice, operations to block source(s)
using EXCLUDE mode are rarely used, but add considerable
implementation complexity to MLDv2. Lightweight MLDv2 [RFC5790] is a
simplified subset of the original MLDv2 specification that omits
EXCLUDE filter mode to specify undesired source(s).
Nodes SHOULD implement either MLDv2 [RFC3810] or Lightweight MLDv2
[RFC5790]. Specifically, nodes supporting applications using Source-
Specific Multicast that expect to take advantage of MLDv2's EXCLUDE
functionality [RFC3810] MUST support MLDv2 as defined in [RFC3810],
[RFC4604] and [RFC4607]. Nodes supporting applications that expect
to only take advantage of MLDv2's INCLUDE functionality as well as
Any-Source Multicast will find it sufficient to support MLDv2 as
defined in [RFC5790].
If a node only supports applications that use Any-Source Multicast
(i.e, they do not use source-specific multicast), implementing MLDv1
[RFC2710] is sufficient. In all cases, however, nodes are strongly
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encouraged to implement MLDv2 or Lightweight MLDv2 rather than MLDv1,
as the presence of a single MLDv1 participant on a link requires that
all other nodes on the link operate in version 1 compatibility mode.
When MLDv1 is used, the rules in the Source Address Selection for the
Multicast Listener Discovery (MLD) Protocol [RFC3590] MUST be
followed.
6. DHCP vs. Router Advertisement Options for Host Configuration
In IPv6, there are two main protocol mechanisms for propagating
configuration information to hosts: Router Advertisements and DHCP.
Historically, RA options have been restricted to those deemed
essential for basic network functioning and for which all nodes are
configured with exactly the same information. Examples include the
Prefix Information Options, the MTU option, etc. On the other hand,
DHCP has generally been preferred for configuration of more general
parameters and for parameters that may be client-specific. That
said, identifying the exact line on whether a particular option
should be configured via DHCP vs. an RA option has not always been
easy. Generally speaking, however, there has been a desire to define
only one mechanism for configuring a given option, rather than
defining multiple (different) ways of configuring the same
information.
One issue with having multiple ways of configuring the same
information is that if a host chooses one mechanism, but the network
operator chooses a different mechanism, interoperability suffers.
For "closed" environments, where the network operator has significant
influence over what devices connect to the network and thus what
configuration mechanisms they support, the operator may be able to
ensure that a particular mechanism is supported by all connected
hosts. In more open environments, however, where arbitrary devices
may connect (e.g., a WIFI hotspot), problems can arise. To maximize
interoperability in such environments hosts would need to implement
multiple configuration mechanisms to ensure interoperability.
Originally in IPv6, configuring information about DNS servers was
performed exclusively via DHCP. In 2007, an RA option was defined,
but was published as Experimental [RFC5006]. In 2010, "IPv6 Router
Advertisement Options for DNS Configuration" [RFC6106] was published
as a Standards Track Document. Consequently, DNS configuration
information can now be learned either through DHCP or through RAs.
Hosts will need to decide which mechanism (or whether both) should be
implemented.
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7. DNS and DHCP
7.1. DNS
DNS is described in [RFC1034], [RFC1035], [RFC3363], and [RFC3596].
Not all nodes will need to resolve names; those that will never need
to resolve DNS names do not need to implement resolver functionality.
However, the ability to resolve names is a basic infrastructure
capability that applications rely on and most nodes will need to
provide support. All nodes SHOULD implement stub-resolver [RFC1034]
functionality, as in RFC 1034, Section 5.3.1, with support for:
- AAAA type Resource Records [RFC3596];
- reverse addressing in ip6.arpa using PTR records [RFC3596];
- EDNS0 [RFC2671] to allow for DNS packet sizes larger than 512
octets.
Those nodes are RECOMMENDED to support DNS security extensions
[RFC4033], [RFC4034], and [RFC4035].
Those nodes are NOT RECOMMENDED to support the experimental A6
Resource Records [RFC3363].
7.2. Dynamic Host Configuration Protocol for IPv6 (DHCPv6) - RFC 3315
7.2.1. Other Configuration Information
IPv6 nodes use DHCP [RFC3315] to obtain address configuration
information (See Section 5.8.5) and to obtain additional (non-
address) configuration. If a host implementation supports
applications or other protocols that require configuration that is
only available via DHCP, hosts SHOULD implement DHCP. For
specialized devices on which no such configuration need is present,
DHCP may not be necessary.
An IPv6 node can use the subset of DHCP (described in [RFC3736]) to
obtain other configuration information.
7.2.2. Use of Router Advertisements in Managed Environments
Nodes using the Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
are expected to determine their default router information and on-
link prefix information from received Router Advertisements.
7.3. IPv6 Router Advertisement Options for DNS Configuration - RFC 6106
Router Advertisements have historically limited options to those that
are critical to basic IPv6 functioning. Originally, DNS
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configuration was not included as an RA option and DHCP was the
recommended way to obtain DNS configuration information. Over time,
the thinking surrounding such an option has evolved. It is now
generally recognized that few nodes can function adequately without
having access to a working DNS resolver. RFC 5006 was published as
an experimental document in 2007, and recently, a revised version was
placed on the Standards Track [RFC6106].
Implementations SHOULD implement the DNS RA option [RFC6106].
8. IPv4 Support and Transition
IPv6 nodes MAY support IPv4.
8.1. Transition Mechanisms
8.1.1. Basic Transition Mechanisms for IPv6 Hosts and Routers - RFC
4213
If an IPv6 node implements dual stack and tunneling, then [RFC4213]
MUST be supported.
9. Application Support
9.1. Textual Representation of IPv6 Addresses - RFC 5952
Software that allows users and operators to input IPv6 addresses in
text form SHOULD support "A Recommendation for IPv6 Address Text
Representation" [RFC5952].
9.2. Application Program Interfaces (APIs)
There are a number of IPv6-related APIs. This document does not
mandate the use of any, because the choice of API does not directly
relate to on-the-wire behavior of protocols. Implementers, however,
would be advised to consider providing a common API, or reviewing
existing APIs for the type of functionality they provide to
applications.
"Basic Socket Interface Extensions for IPv6" [RFC3493] provides IPv6
functionality used by typical applications. Implementers should note
that RFC3493 has been picked up and further standardized by POSIX
[POSIX].
"Advanced Sockets Application Program Interface (API) for IPv6"
[RFC3542] provides access to advanced IPv6 features needed by
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diagnostic and other more specialized applications.
"IPv6 Socket API for Source Address Selection" [RFC5014] provides
facilities that allow an application to override the default Source
Address Selection rules of [RFC3484].
"Socket Interface Extensions for Multicast Source Filters" [RFC3678]
provides support for expressing source filters on multicast group
memberships.
"Extension to Sockets API for Mobile IPv6" [RFC4584] provides
application support for accessing and enabling Mobile IPv6 features.
[RFC3775]
10. Mobility
Mobile IPv6 [RFC3775] and associated specifications [RFC3776]
[RFC4877] allow a node to change its point of attachment within the
Internet, while maintaining (and using) a permanent address. All
communication using the permanent address continues to proceed as
expected even as the node moves around. The definition of Mobile IP
includes requirements for the following types of nodes:
- mobile nodes
- correspondent nodes with support for route optimization
- home agents
- all IPv6 routers
At the present time, Mobile IP has seen only limited implementation
and no significant deployment, partly because it originally assumed
an IPv6-only environment, rather than a mixed IPv4/IPv6 Internet.
Recently, additional work has been done to support mobility in mixed-
mode IPv4 and IPv6 networks[RFC5555].
More usage and deployment experience is needed with mobility before
any specific approach can be recommended for broad implementation in
all hosts and routers. Consequently, [RFC3775], [RFC5555], and
associated standards such as [RFC4877] are considered a MAY at this
time.
11. Security
This section describes the specification for security for IPv6 nodes.
Achieving security in practice is a complex undertaking. Operational
procedures, protocols, key distribution mechanisms, certificate
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management approaches, etc. are all components that impact the level
of security actually achieved in practice. More importantly,
deficiencies or a poor fit in any one individual component can
significantly reduce the overall effectiveness of a particular
security approach.
IPsec provides channel security at the Internet layer, making it
possible to provide secure communication for all (or a subset of)
communication flows at the IP layer between pairs of internet nodes.
IPsec provides sufficient flexibility and granularity that individual
TCP connections can (selectively) be protected, etc.
Although IPsec can be used with manual keying in some cases, such
usage has limited applicability and is not recommended.
A range of security technologies and approaches proliferate today
(e.g., IPsec, TLS, SSH, etc.) No one approach has emerged as an
ideal technology for all needs and environments. Moreover, IPsec is
not viewed as the ideal security technology in all cases and is
unlikely to displace the others.
Previously, IPv6 mandated implementation of IPsec and recommended the
key management approach of IKE. This document updates that
recommendation by making support of the IP Security Architecture [RFC
4301] a SHOULD for all IPv6 nodes. Note that the IPsec Architecture
requires (e.g., Sec. 4.5 of RFC 4301) the implementation of both
manual and automatic key management. Currently the default automated
key management protocol to implement is IKEv2 [RFC5996].
This document recognizes that there exists a range of device types
and environments where other approaches to security than IPsec can be
justified. For example, special-purpose devices may support only a
very limited number or type of applications and an application-
specific security approach may be sufficient for limited management
or configuration capabilities. Alternatively, some devices my run on
extremely constrained hardware (e.g., sensors) where the full IP
Security Architecture is not justified.
11.1. Requirements
"Security Architecture for the Internet Protocol" [RFC4301] SHOULD be
supported by all IPv6 nodes. Note that the IPsec Architecture
requires (e.g., Sec. 4.5 of RFC 4301) the implementation of both
manual and automatic key management. Currently the default automated
key management protocol to implement is IKEv2. As required in
[RFC4301], IPv6 nodes implementing the IPsec Architecture MUST
implement ESP [RFC4303] and MAY implement AH [RFC4302].
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11.2. Transforms and Algorithms
The current set of mandatory-to-implement algorithms for the IP
Security Architecture are defined in 'Cryptographic Algorithm
Implementation Requirements For ESP and AH' [RFC4835]. IPv6 nodes
implementing the IP Security Architecture MUST conform to the
requirements in [RFC4835]. Preferred cryptographic algorithms often
change more frequently than security protocols. Therefore
implementations MUST allow for migration to new algorithms, as
RFC4835 is replaced or updated in the future.
The current set of mandatory-to-implement algorithms for IKEv2 are
defined in 'Cryptographic Algorithms for Use in the Internet Key
Exchange Version 2 (IKEv2)' [RFC4307]. IPv6 nodes implementing IKEv2
MUST conform to the requirements in [RFC4307] and/or any future
updates or replacements to [RFC4307].
12. Router-Specific Functionality
This section defines general host considerations for IPv6 nodes that
act as routers. Currently, this section does not discuss routing-
specific requirements.
12.1. General
12.1.1. IPv6 Router Alert Option - RFC 2711
The IPv6 Router Alert Option [RFC2711] is an optional IPv6 Hop-by-Hop
Header that is used in conjunction with some protocols (e.g., RSVP
[RFC2205] or MLD [RFC2710]). The Router Alert option will need to be
implemented whenever protocols that mandate its usage (e.g., MLD) are
implemented. See Section 5.9.
12.1.2. Neighbor Discovery for IPv6 - RFC 4861
Sending Router Advertisements and processing Router Solicitation MUST
be supported.
Section 7 of RFC 3775 includes some mobility-specific extensions to
Neighbor Discovery. Routers SHOULD implement Sections 7.3 and 7.5,
even if they do not implement Home Agent functionality.
13. Network Management
Network Management MAY be supported by IPv6 nodes. However, for IPv6
nodes that are embedded devices, network management may be the only
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possible way of controlling these nodes.
13.1. Management Information Base Modules (MIBs)
The following two MIB modules SHOULD be supported by nodes that
support an SNMP agent.
13.1.1. IP Forwarding Table MIB
IP Forwarding Table MIB [RFC4292] SHOULD be supported by nodes that
support an SNMP agent.
13.1.2. Management Information Base for the Internet Protocol (IP)
IP MIB [RFC4293] SHOULD be supported by nodes that support an SNMP
agent.
14. Security Considerations
This document does not directly affect the security of the Internet,
beyond the security considerations associated with the individual
protocols.
Security is also discussed in Section 10 above.
15. IANA Considerations
This document has no requests for IANA.
16. Authors and Acknowledgments
16.1. Authors and Acknowledgments (Current Document)
For this version of the IPv6 Node Requirements document, the authors
would like to thank Hitoshi Asaeda, Brian Carpenter, Tim Chown, Ralph
Droms, Sheila Frankel, Sam Hartman, Bob Hinden, Paul Hoffman, Pekka
Savola, Yaron Sheffer and Dave Thaler for their comments.
16.2. Authors and Acknowledgments From RFC 4279
The original version of this document (RFC 4279) was written by the
IPv6 Node Requirements design team:
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Jari Arkko
jari.arkko@ericsson.com
Marc Blanchet
marc.blanchet@viagenie.qc.ca
Samita Chakrabarti
samita.chakrabarti@eng.sun.com
Alain Durand
alain.durand@sun.com
Gerard Gastaud
gerard.gastaud@alcatel.fr
Jun-ichiro itojun Hagino
itojun@iijlab.net
Atsushi Inoue
inoue@isl.rdc.toshiba.co.jp
Masahiro Ishiyama
masahiro@isl.rdc.toshiba.co.jp
John Loughney
john.loughney@nokia.com
Rajiv Raghunarayan
raraghun@cisco.com
Shoichi Sakane
shouichi.sakane@jp.yokogawa.com
Dave Thaler
dthaler@windows.microsoft.com
Juha Wiljakka
juha.wiljakka@Nokia.com
The authors would like to thank Ran Atkinson, Jim Bound, Brian
Carpenter, Ralph Droms, Christian Huitema, Adam Machalek, Thomas
Narten, Juha Ollila, and Pekka Savola for their comments. Thanks to
Mark Andrews for comments and corrections on DNS text. Thanks to
Alfred Hoenes for tracking the updates to various RFCs.
17. Appendix: Changes from One ID version to Another
RFC Editor: Please remove this section upon publication.
17.1. Appendix: Changes from -09 to -10
1. With changes in requirements for IPsec and Routing Headers,
clarified language regarding processing of unknown options, and
removed paragraph lising which extension headers were required to
be implemented.
2. Removed "RFC4292-bis" from title.
3. Expanded the text on Jumbograms.
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4. Changed recommendation of DHCPv6 from MAY to SHOULD.
5. Expanded the text on RFC4191, and changed recommendation from MAY
to SHOULD.
17.2. Appendix: Changes from -08 to -09
1. Updated MLD section to include reference to Lightweight MLD
[RFC5790]
17.3. Appendix: Changes from -07 to -08
1. Dropped reference to "Transmission of IPv6 over IPv4 Domains
without Explicit Tunnels" [RFC2429] in favor of a reference to
tunneling via Basic IPv6 Transition Mechanisms (RFC4313).
2. Added reference to "Default Router Preferences and More-Specific
Routes" [RFC4191] as a MAY.
3. Added reference to "Optimistic Duplicate Address Detection (DAD)
for IPv6" (RFC4429).
4. Added reference to RFC4941 "Reserved IPv6 Interface Identifiers"
5. Added Section on APIs. References are FYI, and none are
required.
6. Added text that "IPv6 Host-to-Router Load Sharing" [RFC4311]
SHOULD be implemented
7. Added reference to RFC5722 (Overlapping Fragments), made it a
MUST to implement.
8. Made "A Recommendation for IPv6 Address Text Representation"
[RFC5952] a SHOULD.
17.4. Appendix: Changes from -06 to -07
1. Added recommendation that routers implement Section 7.3 and 7.5
of RFC 3775.
2. "IPv6 Router Advertisement Options for DNS Configuration" (RFC
6106) has been published.
3. Further clarifications to the MLD recommendation.
4. "Extended ICMP to Support Multi- Part Messages" [RFC4884] added
as a MAY.
5. Added pointer to subnet clarification document (RFC 5942).
6. Added text that "IPv6 Host-to-Router Load Sharing" [RFC4311]
SHOULD be implemented
7. Added reference to RFC5722 (Overlapping Fragments), made it a
MUST to implement.
8. Made "A Recommendation for IPv6 Address Text Representation"
[RFC5952] a SHOULD.
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17.5. Appendix: Changes from -05 to -06
1. Completely revised IPsec/IKEv2 section. Text has been discussed
by 6man and saag.
2. Added text to introduction clarifying that this document applies
to general nodes and that other profiles may be more specific in
their requirements
3. Editorial cleanups in Neighbor Discovery section in particular.
Text made more crisp.
4. Moved some of the DHCP text around. Moved stateful address
discussion to Section 5.8.5.
5. Added additional nuance to the redirect requirements w.r.t.
default configuration setting.
17.6. Appendix: Changes from -04 to -05
1. Cleaned up IPsec section, but key questions (MUST vs. SHOULD)
still open.
2. Added background section on DHCP vs. RA options.
3. Added SHOULD recommendation for DNS configuration vi RAs
(RFC5006bis).
4. Cleaned up DHCP section, as it was referring to the M&O bits.
5. Cleaned up the Security Considerations Section.
17.7. Appendix: Changes from -03 to -04
1. Updated the Introduction to indicate document is an applicability
statement
2. Updated the section on Mobility protocols
3. Changed Sub-IP Layer Section to just list relevant RFCs, and
added some more RFCs.
4. Added Section on SEND (make it a MAY)
5. Redid Section on Privacy Extensions (RFC4941) to add more nuance
to recommendation
6. Redid section on Mobility, and added additional RFCs.
18. Appendix: Changes from RFC 4294
1. There have been many editorial clarifications as well as
significant additions and updates. While this section
highlights some of the changes, readers should not rely on this
section for a comprehensive list of all changes.
2. Updated the Introduction to indicate document is an
applicability statement and that this document is aimed at
general nodes.
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3. Significantly updated the section on Mobility protocols, adding
references and downgrading previous SHOULDs to MAY.
4. Changed Sub-IP Layer Section to just list relevant RFCs, and
added some more RFCs.
5. Added Section on SEND (it is a MAY)
6. Revised Section on Privacy Extensions (RFC4941) to add more
nuance to recommendation.
7. Completely revised IPsec/IKEv2 Section, downgrading overall
recommendation to a SHOULD.
8. Upgraded recommendation of DHCPv6 to SHOULD.
9. Added background section on DHCP vs RA options, added SHOULD
recommendation sfor DNS configuration via RAs (RFC 6106),
cleaned up DHCP recommendations
10. Added recommendation that routers implement Section 7.3 and 7.5
of RFC 3775.
11. Added pointer to subnet clarification document (RFC 5942).
12. Added text that "IPv6 Host-to-Router Load Sharing" [RFC4311]
SHOULD be implemented
13. Added reference to RFC5722 (Overlapping Fragments), made it a
MUST to implement.
14. Made "A Recommendation for IPv6 Address Text Representation"
[RFC5952] a SHOULD.
15. Removed mention of "DNAME" from the discussion about RFC-3363.
16. Numerous updates to reflect newer versions of IPv6 documents,
including 4443, 4291, 3596, 4213.
17. Removed discussion of "Managed" and "Other" flags in RAs. There
is no consensus at present on how to process these flags and
discussion of their semantics was removed in the most recent
update of Stateless Address Autoconfiguration (RFC 4862).
18. Added many more references to optional IPv6 documents.
19. Made "A Recommendation for IPv6 Address Text Representation"
[RFC5952] a SHOULD.
20. Added reference to RFC5722 (Overlapping Fragments), made it a
MUST to implement.
21. Updated MLD section to include reference to Lightweight MLD
[RFC5790]
22. Added SHOULD recommendation for "Default Router Preferences and
More-Specific Routes" [RFC4191].
19. References
19.1. Normative References
[RFC1034] Mockapetris, P., "Domain names - concepts and facilities",
STD 13, RFC 1034, November 1987.
[RFC1035] Mockapetris, P., "Domain names - implementation and
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specification", STD 13, RFC 1035, November 1987.
[RFC1981] McCann, J., Deering, S., and J. Mogul, "Path MTU Discovery
for IP version 6", RFC 1981, August 1996.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6
(IPv6) Specification", RFC 2460, December 1998.
[RFC2671] Vixie, P., "Extension Mechanisms for DNS (EDNS0)",
RFC 2671, August 1999.
[RFC2710] Deering, S., Fenner, W., and B. Haberman, "Multicast
Listener Discovery (MLD) for IPv6", RFC 2710,
October 1999.
[RFC2711] Partridge, C. and A. Jackson, "IPv6 Router Alert Option",
RFC 2711, October 1999.
[RFC3315] Droms, R., Bound, J., Volz, B., Lemon, T., Perkins, C.,
and M. Carney, "Dynamic Host Configuration Protocol for
IPv6 (DHCPv6)", RFC 3315, July 2003.
[RFC3484] Draves, R., "Default Address Selection for Internet
Protocol version 6 (IPv6)", RFC 3484, February 2003.
[RFC3590] Haberman, B., "Source Address Selection for the Multicast
Listener Discovery (MLD) Protocol", RFC 3590,
September 2003.
[RFC3596] Thomson, S., Huitema, C., Ksinant, V., and M. Souissi,
"DNS Extensions to Support IP Version 6", RFC 3596,
October 2003.
[RFC3736] Droms, R., "Stateless Dynamic Host Configuration Protocol
(DHCP) Service for IPv6", RFC 3736, April 2004.
[RFC3810] Vida, R. and L. Costa, "Multicast Listener Discovery
Version 2 (MLDv2) for IPv6", RFC 3810, June 2004.
[RFC4033] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "DNS Security Introduction and Requirements",
RFC 4033, March 2005.
[RFC4034] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Resource Records for the DNS Security Extensions",
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RFC 4034, March 2005.
[RFC4035] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Protocol Modifications for the DNS Security
Extensions", RFC 4035, March 2005.
[RFC4213] Nordmark, E. and R. Gilligan, "Basic Transition Mechanisms
for IPv6 Hosts and Routers", RFC 4213, October 2005.
[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing
Architecture", RFC 4291, February 2006.
[RFC4292] Haberman, B., "IP Forwarding Table MIB", RFC 4292,
April 2006.
[RFC4293] Routhier, S., "Management Information Base for the
Internet Protocol (IP)", RFC 4293, April 2006.
[RFC4301] Kent, S. and K. Seo, "Security Architecture for the
Internet Protocol", RFC 4301, December 2005.
[RFC4303] Kent, S., "IP Encapsulating Security Payload (ESP)",
RFC 4303, December 2005.
[RFC4307] Schiller, J., "Cryptographic Algorithms for Use in the
Internet Key Exchange Version 2 (IKEv2)", RFC 4307,
December 2005.
[RFC4311] Hinden, R. and D. Thaler, "IPv6 Host-to-Router Load
Sharing", RFC 4311, November 2005.
[RFC4443] Conta, A., Deering, S., and M. Gupta, "Internet Control
Message Protocol (ICMPv6) for the Internet Protocol
Version 6 (IPv6) Specification", RFC 4443, March 2006.
[RFC4604] Holbrook, H., Cain, B., and B. Haberman, "Using Internet
Group Management Protocol Version 3 (IGMPv3) and Multicast
Listener Discovery Protocol Version 2 (MLDv2) for Source-
Specific Multicast", RFC 4604, August 2006.
[RFC4607] Holbrook, H. and B. Cain, "Source-Specific Multicast for
IP", RFC 4607, August 2006.
[RFC4835] Manral, V., "Cryptographic Algorithm Implementation
Requirements for Encapsulating Security Payload (ESP) and
Authentication Header (AH)", RFC 4835, April 2007.
[RFC4861] Narten, T., Nordmark, E., Simpson, W., and H. Soliman,
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"Neighbor Discovery for IP version 6 (IPv6)", RFC 4861,
September 2007.
[RFC4862] Thomson, S., Narten, T., and T. Jinmei, "IPv6 Stateless
Address Autoconfiguration", RFC 4862, September 2007.
[RFC4941] Narten, T., Draves, R., and S. Krishnan, "Privacy
Extensions for Stateless Address Autoconfiguration in
IPv6", RFC 4941, September 2007.
[RFC5095] Abley, J., Savola, P., and G. Neville-Neil, "Deprecation
of Type 0 Routing Headers in IPv6", RFC 5095,
December 2007.
[RFC5453] Krishnan, S., "Reserved IPv6 Interface Identifiers",
RFC 5453, February 2009.
[RFC5722] Krishnan, S., "Handling of Overlapping IPv6 Fragments",
RFC 5722, December 2009.
[RFC5790] Liu, H., Cao, W., and H. Asaeda, "Lightweight Internet
Group Management Protocol Version 3 (IGMPv3) and Multicast
Listener Discovery Version 2 (MLDv2) Protocols", RFC 5790,
February 2010.
[RFC5942] Singh, H., Beebee, W., and E. Nordmark, "IPv6 Subnet
Model: The Relationship between Links and Subnet
Prefixes", RFC 5942, July 2010.
[RFC5952] Kawamura, S. and M. Kawashima, "A Recommendation for IPv6
Address Text Representation", RFC 5952, August 2010.
[RFC5996] Kaufman, C., Hoffman, P., Nir, Y., and P. Eronen,
"Internet Key Exchange Protocol Version 2 (IKEv2)",
RFC 5996, September 2010.
[RFC6106] Jeong, J., Park, S., Beloeil, L., and S. Madanapalli,
"IPv6 Router Advertisement Options for DNS Configuration",
RFC 6106, November 2010.
[RFC6204] Singh, H., Beebee, W., Donley, C., Stark, B., and O.
Troan, "Basic Requirements for IPv6 Customer Edge
Routers", RFC 6204, April 2011.
19.2. Informative References
[DODv6] DISR IPv6 Standards Technical Working Group, "DoD IPv6
Standard Profiles For IPv6 Capable Products Version 5.0",
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July 2010,
<http://jitc.fhu.disa.mil/apl/ipv6/pdf/disr_ipv6_50.pdf>.
[POSIX] IEEE, "IEEE Std. 1003.1-2001 Standard for Information
Technology -- Portable Operating System Interface (POSIX),
ISO/IEC 9945:2002", December 2001,
<http://www.opengroup.org/austin>.
[RFC0793] Postel, J., "Transmission Control Protocol", STD 7,
RFC 793, September 1981.
[RFC2205] Braden, B., Zhang, L., Berson, S., Herzog, S., and S.
Jamin, "Resource ReSerVation Protocol (RSVP) -- Version 1
Functional Specification", RFC 2205, September 1997.
[RFC2429] Bormann, C., Cline, L., Deisher, G., Gardos, T., Maciocco,
C., Newell, D., Ott, J., Sullivan, G., Wenger, S., and C.
Zhu, "RTP Payload Format for the 1998 Version of ITU-T
Rec. H.263 Video (H.263+)", RFC 2429, October 1998.
[RFC2464] Crawford, M., "Transmission of IPv6 Packets over Ethernet
Networks", RFC 2464, December 1998.
[RFC2492] Armitage, G., Schulter, P., and M. Jork, "IPv6 over ATM
Networks", RFC 2492, January 1999.
[RFC2590] Conta, A., Malis, A., and M. Mueller, "Transmission of
IPv6 Packets over Frame Relay Networks Specification",
RFC 2590, May 1999.
[RFC2675] Borman, D., Deering, S., and R. Hinden, "IPv6 Jumbograms",
RFC 2675, August 1999.
[RFC3146] Fujisawa, K. and A. Onoe, "Transmission of IPv6 Packets
over IEEE 1394 Networks", RFC 3146, October 2001.
[RFC3363] Bush, R., Durand, A., Fink, B., Gudmundsson, O., and T.
Hain, "Representing Internet Protocol version 6 (IPv6)
Addresses in the Domain Name System (DNS)", RFC 3363,
August 2002.
[RFC3493] Gilligan, R., Thomson, S., Bound, J., McCann, J., and W.
Stevens, "Basic Socket Interface Extensions for IPv6",
RFC 3493, February 2003.
[RFC3542] Stevens, W., Thomas, M., Nordmark, E., and T. Jinmei,
"Advanced Sockets Application Program Interface (API) for
IPv6", RFC 3542, May 2003.
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[RFC3678] Thaler, D., Fenner, B., and B. Quinn, "Socket Interface
Extensions for Multicast Source Filters", RFC 3678,
January 2004.
[RFC3775] Johnson, D., Perkins, C., and J. Arkko, "Mobility Support
in IPv6", RFC 3775, June 2004.
[RFC3776] Arkko, J., Devarapalli, V., and F. Dupont, "Using IPsec to
Protect Mobile IPv6 Signaling Between Mobile Nodes and
Home Agents", RFC 3776, June 2004.
[RFC3971] Arkko, J., Kempf, J., Zill, B., and P. Nikander, "SEcure
Neighbor Discovery (SEND)", RFC 3971, March 2005.
[RFC3972] Aura, T., "Cryptographically Generated Addresses (CGA)",
RFC 3972, March 2005.
[RFC4191] Draves, R. and D. Thaler, "Default Router Preferences and
More-Specific Routes", RFC 4191, November 2005.
[RFC4302] Kent, S., "IP Authentication Header", RFC 4302,
December 2005.
[RFC4338] DeSanti, C., Carlson, C., and R. Nixon, "Transmission of
IPv6, IPv4, and Address Resolution Protocol (ARP) Packets
over Fibre Channel", RFC 4338, January 2006.
[RFC4380] Huitema, C., "Teredo: Tunneling IPv6 over UDP through
Network Address Translations (NATs)", RFC 4380,
February 2006.
[RFC4429] Moore, N., "Optimistic Duplicate Address Detection (DAD)
for IPv6", RFC 4429, April 2006.
[RFC4584] Chakrabarti, S. and E. Nordmark, "Extension to Sockets API
for Mobile IPv6", RFC 4584, July 2006.
[RFC4821] Mathis, M. and J. Heffner, "Packetization Layer Path MTU
Discovery", RFC 4821, March 2007.
[RFC4877] Devarapalli, V. and F. Dupont, "Mobile IPv6 Operation with
IKEv2 and the Revised IPsec Architecture", RFC 4877,
April 2007.
[RFC4884] Bonica, R., Gan, D., Tappan, D., and C. Pignataro,
"Extended ICMP to Support Multi-Part Messages", RFC 4884,
April 2007.
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[RFC4944] Montenegro, G., Kushalnagar, N., Hui, J., and D. Culler,
"Transmission of IPv6 Packets over IEEE 802.15.4
Networks", RFC 4944, September 2007.
[RFC5006] Jeong, J., Park, S., Beloeil, L., and S. Madanapalli,
"IPv6 Router Advertisement Option for DNS Configuration",
RFC 5006, September 2007.
[RFC5014] Nordmark, E., Chakrabarti, S., and J. Laganier, "IPv6
Socket API for Source Address Selection", RFC 5014,
September 2007.
[RFC5072] S.Varada, Haskins, D., and E. Allen, "IP Version 6 over
PPP", RFC 5072, September 2007.
[RFC5121] Patil, B., Xia, F., Sarikaya, B., Choi, JH., and S.
Madanapalli, "Transmission of IPv6 via the IPv6
Convergence Sublayer over IEEE 802.16 Networks", RFC 5121,
February 2008.
[RFC5555] Soliman, H., "Mobile IPv6 Support for Dual Stack Hosts and
Routers", RFC 5555, June 2009.
[USGv6] National Institute of Standards and Technology, "A Profile
for IPv6 in the U.S. Government - Version 1.0", July 2008,
<http://www.antd.nist.gov/usgv6/usgv6-v1.pdf>.
Authors' Addresses
Ed Jankiewicz
SRI International, Inc.
1161 Broad Street - Suite 212
Shrewsbury, NJ 07702
USA
Phone: 443-502-5815
Email: edward.jankiewicz@sri.com
Jankiewicz, et al. Expires November 24, 2011 [Page 30]
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John Loughney
Nokia
955 Page Mill Road
Palo Alto 94303
USA
Phone: +1 650 283 8068
Email: john.loughney@nokia.com
Thomas Narten
IBM Corporation
3039 Cornwallis Ave.
PO Box 12195
Research Triangle Park, NC 27709-2195
USA
Phone: +1 919 254 7798
Email: narten@us.ibm.com
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