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rfc:rfc4057

Network Working Group J. Bound, Ed. Request for Comments: 4057 Hewlett Packard Category: Informational June 2005

                 IPv6 Enterprise Network Scenarios

Status of This Memo

 This memo provides information for the Internet community.  It does
 not specify an Internet standard of any kind.  Distribution of this
 memo is unlimited.

Copyright Notice

 Copyright (C) The Internet Society (2005).

Abstract

 This document describes the scenarios for IPv6 deployment within
 enterprise networks.  It defines a small set of basic enterprise
 scenarios and includes pertinent questions to allow enterprise
 administrators to further refine their deployment scenarios.
 Enterprise deployment requirements are discussed in terms of
 coexistence with IPv4 nodes, networks and applications, and in terms
 of basic network infrastructure requirements for IPv6 deployment.
 The scenarios and requirements described in this document will be the
 basis for further analysis to determine what coexistence techniques
 and mechanisms are needed for enterprise IPv6 deployment.  The
 results of that analysis will be published in a separate document.

Table of Contents

 1.  Introduction................................................... 2
 2.  Terminology.................................................... 3
 3.  Base Scenarios................................................. 4
     3.1.  Base Scenarios Defined................................... 4
     3.2.  Scenarios Network Infrastructure Components.............. 5
     3.3.  Specific Scenario Examples............................... 8
     3.4.  Applicability Statement..................................10
 4.  Network Infrastructure Component Requirements..................10
     4.1.  DNS......................................................11
     4.2.  Routing..................................................11
     4.3.  Configuration of Hosts...................................11
     4.4.  Security.................................................11
     4.5.  Applications.............................................12
     4.6.  Network Management.......................................12
     4.7.  Address Planning.........................................12

Bound Informational [Page 1] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

     4.8.  Multicast................................................12
     4.9.  Multihoming..............................................12
 5.  Security Considerations........................................12
 6.  Normative References...........................................13
 Acknowledgements...................................................13

1. Introduction

 This document describes the scenarios for IPv6 deployment within
 enterprise networks.  It defines a small set of basic enterprise
 scenarios and includes pertinent questions to allow enterprise
 administrators to further refine their deployment scenarios.
 Enterprise deployment requirements are discussed in terms of
 coexistence with IPv4 nodes, networks and applications, and in terms
 of basic network infrastructure requirements for IPv6 deployment.
 The scenarios and requirements described in this document will be the
 basis for further analysis to determine what coexistence techniques
 and mechanisms are needed for enterprise IPv6 deployment.  The
 results of that analysis will be published in a separate document.
 The audience for this document is the enterprise network team
 considering deployment of IPv6.  The document will be useful for
 enterprise teams that will have to determine the IPv6 transition
 strategy for their enterprise.  It is expected those teams include
 members from management, network operations, and engineering.  The
 scenarios presented provide an example set of cases the enterprise
 can use to build an IPv6 network scenario.
 To frame the discussion, this document will describe a set of
 scenarios each with a network infrastructure.  It is impossible to
 define every possible enterprise scenario that will apply to IPv6
 adoption and transition.
 Each enterprise will select the transition that best supports their
 business requirements.  Any attempt to define a default or one-size-
 fits-all transition scenario, simply will not work.  This document
 does not try to depict the drivers for adoption of IPv6 by an
 enterprise.
 While it is difficult to quantify all the scenarios for an enterprise
 network team to plan for IPv6, it is possible to depict a set of
 abstract scenarios that will assist with planning.  This document
 presents three base scenarios to be used as models by enterprises
 defining specific scenarios.
 The first scenario assumes the enterprise decides to deploy IPv6 in
 conjunction with IPv4.  The second scenario assumes the enterprise
 decides to deploy IPv6 because of a specific set of applications that

Bound Informational [Page 2] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 it wants to use over an IPv6 network.  The third scenario assumes an
 enterprise is building a new network or restructuring an existing
 network and decides to deploy IPv6 as the predominant protocol within
 the enterprise coexisting with IPv4.  This document then briefly
 reviews a set of network infrastructure components that must be
 analyzed, which are common to most enterprises.
 This document then provides three specific scenario examples using
 the network infrastructure components to depict the requirements.
 These are common enterprise deployment cases to depict the challenges
 for the enterprise to transition a network to IPv6.
 Next, supporting legacy functions on the network (while the
 transition is in process), and the network infrastructure components
 requiring analysis by the enterprise are discussed.  The
 interoperation with legacy functions within the enterprise will be
 required for all transition except possibly by a new network that
 will be IPv6 from inception.  The network infrastructure components
 will depict functions in their networks that require consideration
 for IPv6 deployment and transition.
 Using the scenarios, network infrastructure components, and examples
 in this document, an enterprise can define its specific scenario
 requirements.  Understanding the legacy functions and network
 infrastructure components required, the enterprise can determine the
 network operations required to deploy IPv6.  The tools and mechanisms
 to support IPv6 deployment operations will require enterprise
 analysis.  The analysis to determine the tools and mechanisms to
 support the scenarios will be presented in subsequent document(s).

2. Terminology

 Enterprise Network - A network that has multiple internal links, one
                      or more router connections to one or more
                      Providers, and is actively managed by a network
                      operations entity.
 Provider           - An entity that provides services and
                      connectivity to the Internet or other private
                      external networks for the enterprise network.
 IPv6 Capable       - A node or network capable of supporting both
                      IPv6 and IPv4.
 IPv4 only          - A node or network capable of supporting only
                      IPv4.

Bound Informational [Page 3] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 IPv6 only          - A node or network capable of supporting only
                      IPv6.  This does not imply an IPv6 only stack in
                      this document.

3. Base Scenarios

 Three base scenarios are defined to capture the essential abstraction
 set for the enterprise.  Each scenario has assumptions and
 requirements.  This is not an exhaustive set of scenarios, but a base
 set of general cases.
 Below we use the term network infrastructure to mean the software,
 network operations and configuration, and methods used to operate a
 network in an enterprise.
 For the base scenarios it is assumed that any IPv6 node is IPv6
 capable.

3.1. Base Scenarios Defined

 Scenario 1:   Wide-scale/total dual-stack deployment of IPv4 and IPv6
               capable hosts and network infrastructure.  Enterprise
               with an existing IPv4 network wants to deploy IPv6 in
               conjunction with their IPv4 network.
 Assumptions:  The IPv4 network infrastructure used has an equivalent
               capability in IPv6.
 Requirements: Do not disrupt existing IPv4 network infrastructure
               assumptions with IPv6.  IPv6 should be equivalent or
               "better" than the network infrastructure in IPv4.
               However, it is understood that IPv6 is not required to
               solve current network infrastructure problems, not
               solved by IPv4.  It may also not be feasible to deploy
               IPv6 on all parts of the network immediately.
 Scenario 2:   Sparse IPv6 dual-stack deployment in IPv4 network
               infrastructure.  Enterprise with an existing IPv4
               network wants to deploy a set of particular IPv6
               "applications" (application is voluntarily loosely
               defined here, e.g., peer to peer).  The IPv6 deployment
               is limited to the minimum required to operate this set
               of applications.
 Assumptions:  IPv6 software/hardware components for the application
               are available, and platforms for the application are
               IPv6 capable.

Bound Informational [Page 4] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 Requirements: Do not disrupt IPv4 infrastructure.
 Scenario 3:   IPv6-only network infrastructure with some IPv4-capable
               nodes/applications needing to communicate over the IPv6
               infrastructure.  Enterprise deploying a new network or
               restructuring an existing network, decides IPv6 is the
               basis for most network communication.  Some IPv4
               capable nodes/applications will need to communicate
               over that infrastructure.
 Assumptions:  Required IPv6 network infrastructure is available, or
               available over some defined timeline, supporting the
               enterprise plan.
 Requirements: Interoperation and Coexistence with IPv4 network
               infrastructure and applications are required for
               communications.

3.2. Scenarios Network Infrastructure Components

 This section defines the network infrastructure that exists for the
 above enterprise scenarios.  This is not an exhaustive list, but a
 base list that can be expanded by the enterprise for specific
 deployment scenarios.  The network infrastructure components are
 presented as functions that the enterprise must analyze as part of
 defining their specific scenario.  The analysis of these functions
 will identify actions that are required to deploy IPv6.
 Network Infrastructure Component 1
  Enterprise Provider Requirements
   - Is external connectivity required?
   - One site vs. multiple sites and are they within different
     geographies?
   - Leased lines or VPNs?
   - If multiple sites, how is the traffic exchanged securely?
   - How many global IPv4 addresses are available to the enterprise?
   - What is the IPv6 address assignment plan available from the
     provider?
   - What prefix delegation is required by the Enterprise?
   - Will the enterprise be multihomed?
   - What multihoming techniques are available from the provider?
   - Will clients within the enterprise be multihomed?
   - Does the provider offer any IPv6 services?
   - Which site-external IPv6 routing protocols are required?
   - Is there an external data center to the enterprise, such as
     servers located at the Provider?
   - Is IPv6 available using the same access links as IPv4, or
     different ones?

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 Network Infrastructure Component 2
  Enterprise Application Requirements
   - List of applications in use?
   - Which applications must be moved to support IPv6 first?
   - Can the application be upgraded to IPv6?
   - Will the application have to support both IPv4 and IPv6?
   - Do the enterprise platforms support both IPv4 and IPv6?
   - Do the applications have issues with NAT v4-v4 and NAT v4-v6?
   - Do the applications need globally routable IP addresses?
   - Do the applications care about dependency between IPv4 and IPv6
     addresses?
   - Are applications run only on the internal enterprise network?
 Network Infrastructure Component 3
  Enterprise IT Department Requirements
   - Who "owns"/"operates" the network: in house or outsourced?
   - Is working remotely (i.e., through VPNs) supported?
   - Are inter-site communications required?
   - Is network mobility used or required for IPv6?
   - What are the requirements of the IPv6 address plan?
   - Is there a detailed asset management database, including hosts,
     IP/MAC addresses, etc.?
   - What is the enterprise's approach to numbering geographically
     separate sites that have their own Service Providers?
   - What will be the internal IPv6 address assignment procedure?
   - What site internal IPv6 routing protocols are required?
   - What will be the IPv6 Network Management policy/procedure?
   - What will be the IPv6 QOS policy/procedure?
   - What will be the IPv6 Security policy/procedure?
   - What is the IPv6 training plan to educate the enterprise?
   - What network operations software will be impacted by IPv6?
     - DNS
     - Management (SNMP & ad-hoc tools)
     - Enterprise Network Servers Applications
     - Mail Servers
     - High Availability Software for Nodes
     - Directory Services
     - Are all these software functions upgradeable to IPv6?
     - If not upgradeable, then what are the workarounds?
     - Do any of the software functions store, display, or allow input
       of IP addresses?
     - Other services (e.g., NTP, etc.)

Bound Informational [Page 6] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

  1. What network hardware will be impacted by IPv6?
    1. Routers/switches
    2. Printers/Faxes
    3. Firewalls
    4. Intrusion Detection
    5. Load balancers
    6. VPN Points of Entry/Exit
    7. Security Servers and Services
    8. Network Interconnect for Platforms
    9. Intelligent Network Interface Cards
    10. Network Storage Devices
    11. Are all these hardware functions upgradeable to IPv6?
    12. If not, what are the workarounds?
    13. Do any of the hardware functions store, display, or allow input

of IP addresses?

  1. Are the nodes moving within the enterprise network?
  2. Are the nodes moving outside and inside the enterprise

network?

 Network Infrastructure Component 4
  Enterprise Network Management System
   - Performance Management required?
   - Network Management applications required?
   - Configuration Management required?
   - Policy Management and Enforcement required?
   - Security Management required?
   - Management of Transition Tools and Mechanisms?
   - What new considerations does IPv6 create for Network Management?
 Network Infrastructure Component 5
  Enterprise Network Interoperation and Coexistence
   - What platforms are required to be IPv6 capable?
   - What network ingress and egress points to the site are required
     to be IPv6 capable?
   - What transition mechanisms are needed to support IPv6 network
     operations?
   - What policy/procedures are required to support the transition to
     IPv6?
   - What policy/procedures are required to support interoperation
     with legacy nodes and applications?

Bound Informational [Page 7] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

3.3. Specific Scenario Examples

 This section presents a set of base scenario examples and is not an
 exhaustive list of examples.  These examples were selected to provide
 further clarity for base scenarios within an enterprise of a less
 abstract nature.  The example networks may use the scenarios depicted
 in 3.1 and the infrastructure components in 3.2, but there are no
 direct implications specifically within these example networks.
 Section 3.1, 3.2, and 3.3 should be used in unison for enterprise
 IPv6 deployment planning and analysis.
 Example Network A:
 A distributed network across a number of geographically
 separated campuses.
  1. External network operation.
  2. External connectivity required.
  3. Multiple sites connected by leased lines.
  4. Provider independent IPv4 addresses.
  5. ISP does not offer IPv6 service.
  6. Private Leased Lines no Service Provider used.
 Applications run by the enterprise:
  1. Internal Web/Mail.
  2. File servers.
  3. Java applications.
  4. Collaborative development tools.
  5. Enterprise Resource applications.
  6. Multimedia applications.
  7. Financial Enterprise applications.
  8. Data Warehousing applications.
 Internal network operation:
  1. In house operation of the network.
  2. DHCP (v4) is used for all desktops; servers use static address

configuration.

  1. The DHCP server that updates naming records for dynamic desktops

uses dynamic DNS.

  1. A web based tool is used to enter name to address mappings for

statically addressed servers.

  1. Network management is done using SNMP.
  2. All routers and switches are upgradeable to IPv6.
  3. Existing firewalls can be upgraded to support IPv6 rules.

Bound Informational [Page 8] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

  1. Load balancers do not support IPv6, upgrade path unclear.
  2. Peer-2-Peer Application and Security supported.
  3. IPv4 Private address space is used within the enterprise.
 Example Network B:
 A bank running a large network supporting online
 transaction processing (OLTP) across a distributed
 multi-sited network, with access to a central database
 on a remote network from the OLTP network.
  1. External connectivity not required.
  2. Multiple sites connected by VPN.
  3. Multiple sites connected by Native IP protocol.
  4. Private address space used with NAT.
  5. Connections to private exchanges.
 Applications in the enterprise:
  1. ATM transaction application.
  2. ATM management application.
  3. Financial Software and Database.
  4. Part of the workforce is mobile and requires access to the

enterprise from outside networks.

 Internal Network Operation:
  1. Existing firewalls can be upgraded to support IPv6 rules.
  2. Load balancers do not support IPv6, upgrade path unclear.
  3. Identifying and managing each node's IP address.
 Example Network C:
 A Security Defense, Emergency, or other Mission Critical network
 operation:
  1. External network required at secure specific points.
  2. Network is its own Internet.
  3. Network must be able to absorb ad-hoc creation of sub-networks.
  4. Entire parts of the network are completely mobile.
  5. All nodes on the network can be mobile (including routers).
  6. Network high-availability is mandatory.
  7. Network must be able to be managed from ad-hoc location.
  8. All nodes must be able to be configured from stateless mode.

Bound Informational [Page 9] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 Applications run by the Enterprise:
  1. Multimedia streaming of audio, video, and data for all nodes.
  2. Data computation and analysis on stored and created data.
  3. Transfer of data coordinate points to sensor devices.
  4. Data and Intelligence gathering applications from all nodes.
 Internal Network Operations:
  1. All packets must be secured end-2-end with encryption.
  2. Intrusion Detection exists on all network entry points.
  3. Network must be able to bolt on to the Internet to share

bandwidth as required from Providers.

  1. VPNs can be used, but NAT can never be used.
  2. Nodes must be able to access IPv4 legacy applications over IPv6

network.

3.4. Applicability Statement

 The specific network scenarios selected are chosen to depict a base
 set of examples, and to support further analysis of enterprise
 networks.  This is not a complete set of network scenarios.  Though
 Example Network C is a verifiable use case, currently the scenario
 defines an early adopter of enterprise networks transitioning to IPv6
 as a predominant protocol strategy (i.e., IPv6 Routing, Applications,
 Security, and Operations), viewing IPv4 as legacy operations
 immediately in the transition strategy, and at this time may not be
 representative of many initial enterprise IPv6 deployments.  Each
 enterprise planning team will need to make that determination as IPv6
 deployment evolves.

4. Network Infrastructure Component Requirements

 The enterprise will need to determine which network infrastructure
 components require enhancements or need to be added for deployment of
 IPv6.  This infrastructure will need to be analyzed and understood as
 a critical resource to manage.  The list in this section is not
 exhaustive, but contains the essential network infrastructure
 components for the enterprise to consider before beginning to define
 more fine-tuned requirements such as QOS, PKI, or Bandwidth
 requirements for IPv6.  The components are only identified here and
 their details will be discussed in the analysis document for
 enterprise scenarios.  References currently available for components
 are provided.

Bound Informational [Page 10] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

4.1. DNS

 DNS will now have to support both IPv4 and IPv6 DNS records and the
 enterprise will need to determine how the DNS is to be managed and
 accessed, and secured.  The range of DNS operational issues is beyond
 the scope of this document.  However, DNS resolution and transport
 solutions for both IP protocols are influenced by the chosen IPv6
 deployment scenario.  Users need to consider all current DNS IPv4
 operations and determine if those operations are supported for IPv6
 [DNSV6].

4.2. Routing

 Interior and Exterior routing will be required to support both IPv4
 and IPv6 routing protocols, and the coexistence of IPv4 and IPv6 over
 the enterprise network.  The enterprise will need to define the IPv6
 routing topology, any ingress and egress points to provider networks,
 and transition mechanisms that they wish to use for IPv6 adoption.
 The enterprise will also need to determine what IPv6 transition
 mechanisms are supported by their upstream providers.

4.3. Configuration of Hosts

 IPv6 introduces the concept of stateless autoconfiguration in
 addition to stateful autoconfiguration, for the configuration of
 hosts within the enterprise.  The enterprise will have to determine
 the best method of host configuration for its network, if it will use
 stateless or stateful autoconfiguration, and how autoconfiguration
 will operate for DNS updates.  It will also need to determine how
 prefix delegation will be done from their upstream provider and how
 those prefixes will be cascaded down to the enterprise IPv6 network.
 The policy for DNS or choice of autoconfiguration is out of scope for
 this document [CONF, DHCPF, DHCPL].

4.4. Security

 Current existing mechanisms used for IPv4 to provide security need to
 be supported for IPv6 within the enterprise.  IPv6 should create no
 new security concerns for IPv4.  The entire security infrastructure
 currently used in the enterprise needs to be analyzed against IPv6
 deployment effect to determine what is supported in IPv6.  Users
 should review other current security IPv6 network infrastructure work
 in the IETF and within the industry.  Users will have to work with
 their platform and software providers to determine which IPv6
 security network infrastructure components are supported.  The
 security filters and firewall requirements for IPv6 need to be
 determined by the enterprise.  The policy choice of users for
 security is beyond the scope of this document.

Bound Informational [Page 11] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

4.5. Applications

 Existing applications will need to be ported or provide proxies to
 support both IPv4 and IPv6 [APPS].

4.6. Network Management

 The addition of IPv6 network infrastructure components will need to
 be managed by the enterprise network operations center.  Users will
 need to work with their network management platform providers to
 determine what is supported for IPv6 while planning IPv6 adoption,
 and which tools are available to monitor the network.  Network
 management will not need to support both IPv4 and IPv6 and view nodes
 as dual stacks.

4.7. Address Planning

 The address space within the enterprise will need to be defined and
 coordinated with the routing topology of the enterprise network.  It
 is also important to identify the pool of IPv4 address space
 available to the enterprise to assist with IPv6 transition methods.

4.8. Multicast

 Enterprises utilizing IPv4 Multicast services will need to consider
 how these services may be implemented operationally in an IPv6-
 enabled environment.

4.9. Multihoming

 At this time, current IPv6 allocation policies are mandating the
 allocation of IPv6 address space from the upstream provider.  If an
 enterprise is multihomed, the enterprise will have to determine how
 it wishes to support multihoming.  This also is an area of study
 within the IETF and work in progress.

5. Security Considerations

 This document lists scenarios for the deployment of IPv6 in
 enterprise networks, and there are no security considerations
 associated with making such a list.
 There will be security considerations for the deployment of IPv6 in
 each of these scenarios, but they will be addressed in the document
 that includes the analysis of each scenario.

Bound Informational [Page 12] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

6. Normative References

 [DNSV6]  Durand, A., Ihren, J., and P. Savola, "Operational
          Considerations and Issues with IPv6 DNS", Work in Progress.
 [CONF]   Thomson, S. and T. Narten, "IPv6 Stateless Address
          Autoconfiguration", RFC 2462, December 1998.
 [DHCPF]  Droms, R., Bound, J., Volz, B., Lemon, T., Perkins, C., and
          M. Carney, "Dynamic Host Configuration Protocol for IPv6
          (DHCPv6)", RFC 3315, July 2003
 [DHCPL]  Nikander, P., Kempf, J., and E. Nordmark, "IPv6 Neighbor
          Discovery (ND) Trust Models and Threats", RFC 3756, May
          2004.
 [APPS]   Shin, M-K., Hong, Y-G., Hagino, J., Savola, P., and E.
          Castro, "Application Aspects of IPv6 Transition", RFC 4038,
          March 2005.

Acknowledgements

 The Authors would like to acknowledge contributions from the
 following: IETF v6ops Working Group, Alan Beard, Brian Carpenter,
 Alain Durand, Bob Hinden, and Pekka Savola.

Bound Informational [Page 13] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

Authors' Addresses

 Yanick Pouffary (Chair of Design Team)
 HP Competency Center
 950, Route des Colles, BP027,
 06901 Sophia Antipolis CEDEX
 FRANCE
 Phone: + 33492956285
 EMail: Yanick.pouffary@hp.com
 Jim Bound (Editor)
 Hewlett Packard
 110 Spitbrook Road
 Nashua, NH 03062
 USA
 Phone: (603) 884-0062
 EMail: jim.bound@hp.com
 Marc Blanchet
 Viagenie inc.
 2875 boul. Laurier, bur. 300
 Ste-Foy, Quebec, G1V 2M2
 Canada
 EMail: Marc.Blanchet@viagenie.qc.ca
 Tony Hain
 Cisco Systems
 500 108th Ave. N.E. Suite 400
 Bellevue, WA 98004
 USA
 EMail: alh-ietf@tndh.net
 Paul Gilbert
 Cisco Systems
 1 Penn Plaza, 5th floor,
 NY, NY 10119
 USA
 Phone: (212) 714-4334
 EMail: pgilbert@cisco.com

Bound Informational [Page 14] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 Margaret Wasserman
 ThingMagic
 One Broadway
 Cambridge, MA 02142
 USA
 Phone: (617) 758-4177
 EMail: margaret@thingmagic.com
 Jason Goldschmidt
 Sun Microsystems
 M/S UMPK17-103
 17 Network Circle
 Menlo Park, CA 94025
 USA
 Phone: (650) 786-3502
 Fax:   (650) 786-8250
 EMail: jason.goldschmidt@sun.com
 Aldrin Isaac
 Bloomberg L.P.
 499 Park Avenue
 New York, NY 10022
 USA
 Phone: (212) 940-1812
 EMail: aisaac@bloomberg.com
 Tim Chown
 School of Electronics and Computer Science
 University of Southampton
 Southampton SO17 1BJ
 United Kingdom
 EMail: tjc@ecs.soton.ac.uk

Bound Informational [Page 15] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

 Jordi Palet Martinez
 Consulintel
 San Jose Artesano, 1
 Madrid, SPAIN
 Phone: +34 91 151 81 99
 Fax:   +34 91 151 81 98
 EMail: jordi.palet@consulintel.es
 Fred Templin
 Nokia
 313 Fairchild Drive
 Mountain View, CA 94043
 USA
 Phone: (650) 625-2331
 EMail: ftemplin@iprg.nokia.com
 Roy Brabson
 IBM
 PO BOX 12195
 3039 Cornwallis Road
 Research Triangle Park, NC 27709
 USA
 Phone: (919) 254-7332
 EMail: rbrabson@us.ibm.com

Bound Informational [Page 16] RFC 4057 IPv6 Enterprise Network Scenarios June 2005

Full Copyright Statement

 Copyright (C) The Internet Society (2005).
 This document is subject to the rights, licenses and restrictions
 contained in BCP 78, and except as set forth therein, the authors
 retain all their rights.
 This document and the information contained herein are provided on an
 "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
 OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
 ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
 INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
 INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
 WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Intellectual Property

 The IETF takes no position regarding the validity or scope of any
 Intellectual Property Rights or other rights that might be claimed to
 pertain to the implementation or use of the technology described in
 this document or the extent to which any license under such rights
 might or might not be available; nor does it represent that it has
 made any independent effort to identify any such rights.  Information
 on the procedures with respect to rights in RFC documents can be
 found in BCP 78 and BCP 79.
 Copies of IPR disclosures made to the IETF Secretariat and any
 assurances of licenses to be made available, or the result of an
 attempt made to obtain a general license or permission for the use of
 such proprietary rights by implementers or users of this
 specification can be obtained from the IETF on-line IPR repository at
 http://www.ietf.org/ipr.
 The IETF invites any interested party to bring to its attention any
 copyrights, patents or patent applications, or other proprietary
 rights that may cover technology that may be required to implement
 this standard.  Please address the information to the IETF at ietf-
 ipr@ietf.org.

Acknowledgement

 Funding for the RFC Editor function is currently provided by the
 Internet Society.

Bound Informational [Page 17]

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