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Versions: (draft-ietf-v6ops-entnet-scenarios) 00 01 02 03

IPv6 Operations (v6ops)
Internet Draft                                      J. Bound (Editor)
Document:  draft-pouffary-v6ops-ent-v6net-03.txt    See Author Section
Obsoletes: draft-pouffary-v6ops-ent-v6net-02.txt
Obsoletes: draft-ietf-v6ops-entnet-scenarios-00.txt
Expires: December 2003                              June 2003



                    IPv6 Enterprise Networks Scenarios

                   draft-pouffary-v6ops-ent-v6net-03.txt


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that other
   groups may also distribute working documents as Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoletes 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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html



















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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


Abstract

   This document describes the scenarios for IPv6 deployment within
   Enterprise networks.  It will focus upon an Enterprise set of network
   base scenarios with assumptions, coexistence with legacy IPv4 nodes,
   networks, and applications, and network infrastructure requirements.
   These requirements will be used to provide analysis to determine a
   set of Enterprise solutions in a later document.











































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


Table of Contents

   1. Introduction..................................................4

   2. Terminology...................................................5

   3. Network Base Scenarios........................................6

      3.1 Network Base Scenarios Defined.............................6

      3.2 Network Scenarios Characteristics..........................7

      3.3 Network Scenarios Examples.................................8

   4. Support for Legacy IPv4 Nodes and Applications...............10

      4.1 IPv4 Tunnels to Encapsulate IPv6..........................10

      4.2 IPv6 Tunnels to Encapsulate IPv4..........................10

      4.3 IPv6 NAT to Communicate with IPv4.........................10

   5. Network Infrastructure Requirements..........................11

      5.1 DNS.......................................................11

      5.2 Routing...................................................11

      5.3 Autoconfiguration.........................................11

      5.4 Security..................................................11

      5.5 Applications..............................................11

      5.6 Network Management........................................11

      5.7 Address Planning..........................................12

   6. Security Considerations.......................................13

   References.......................................................14

   Acknowledgments..................................................15

   Authors/Design Team..............................................16






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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


  1. Introduction

   This document describes the scenarios for IPv6 deployment within
   Enterprise networks.  It will focus upon an Enterprise set of network
   base scenarios with assumptions, coexistence with legacy IPv4 nodes,
   networks, and applications, and network infrastructure requirements.
   These requirements will be used to provide analysis to determine a
   set of Enterprise solutions in a later document.

   The audience for this document is the enterprise network team
   considering deployment of IPv6.

   To frame the discussion the document will describe a set of scenarios
   and characteristics for each scenario and then follow those sets with
   example scenario use, and points of transition.

   Each enterprise will need to select the transition to best suit their
   business requirements. Any attempt to define a default or one-size-
   fits-all transition scenario will simply not work.

   While it is difficult to quantify all the potential motivations for
   enterprise network teams to move to IPv6, there are some cases where
   an abstract description is possible.




























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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


  2. Terminology


   Enterprise Network    - An Enterprise Network is a network that has
                           multiple links, a router connection to a
                           Provider, and is actively managed by a
                           network operations entity.

   Provider              - A Provider is an entity that provides
                           services and connectivity to the Internet or
                           other private external networks for the
                           Enterprise Network.
   IPv6/IPv4             - A node or network capable of supporting both
                           IPv6 and IPv4.
   IPv4 only             - A node or network capable of supporting only
                           IPv4.
   IPv6 only             - A node or network capable of supporting only
                           IPv6.

































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


  3. Network Base Scenarios

   Three base scenarios are defined to capture the essential abstraction
   set for the Enterprise. Each scenario has assumptions and
   requirements.

   These scenarios will drive the network characteristics and then
   examples for use by this document.


   3.1 Network Base Scenarios Defined


   Scenario 1: Enterprise with an existing IPv4 network wants to deploy
               IPv6 in parallel with their IPv4 network.
     Assumptions:   The IPv4 characteristics have an equivalent in
                    IPv6.
     Requirements:  Don't break IPv4 network characteristics
                    assumptions with IPv6. IPv6 should be equivalent or
                    "better" than the ones in IPv4, however, it is
                    understood that IPv6 is not required to solve every
                    single problem.


               Enterprise with an existing IPv4 network wants to deploy a set of    Scenario 2:
               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.

                    IPv6 software/hardware components for the application set are      Assumptions:
                    available.

     Requirements:  Don't break IPv4 network operations


   Scenario 3: Enterprise deploying a new network or re-structuring an
               existing network, decides IPv6 is the basis for network
               communication.

     Assumptions:   Required IPv6 network components are available, or
                    available over some defined timeline.
     Requirements:  Interoperation and Coexistence with IPv4 network
                    operations and applications are required for
                    communications.






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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


   3.2 Network Scenarios Characteristics

   Characteristic 1 - Providers for External Network Operation
   - Is external connectivity required?
   - One site vs. multiple sites?
   - Leased lines or VPN?
   - IPv4 existing address ownership (Provider based addresses vs.
    Provider independent addresses)?
   - Multi-homing?
   - Do ISPs offer IPv6 service?
   - Is there an external data-center?

   Characteristic 2 - Enterprise Application Analysis
   - List of applications in use?
   - Can the application be upgraded to IPv6?
   - Can the application support both IPv4 and IPv6?

   Characteristic 3 - Enterprise IT Department Operations Analysis
   - Who "owns"/"operate" the network: in house, outsourced?
   - Is a Tele-commuter work force supported?
   - Is inter-site communications required?
   - Is network mobility used?
   - IPv4 addressing plan?
   - IPv4 addressing assignment procedure (DHCP vs. manual)?
   - Internal IPv4 routing protocols used?
   - External IPv4 routing protocols used?
   - IPv4 Network Management policy/procedure?
   - IPv4 QoS policy/procedure?
   - IPv4 Security policy/procedure?
   - List of "network operation" software that may be impacted by IPv6?
     - DNS
     - Management (SNMP & ad-hoc tools)
     - File servers
     - Backup
   - Are all these software functions upgradeable to IPv6?
   - If not upgradeable, then what are the workarounds?
   - Do any of the software functions store IP addresses?
   - List of "network operation" hardware that may be impacted by IPv6
     - Routers/switches
     - Firewalls
     - Load balancers
     - VPN terminators
     - Security Servers
   - Are all these hardware functions upgradeable to IPv6?
   - If not, what are the workarounds?
   - Do any of the hardware functions store IP addresses?





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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


   Characteristics 4 รป Enterprise Network Management System
   - Considerations for Network Management System
   - What behavior to expect from NMS for each transition vehicle
   - Translators for IPv6 Operations
   - Tunnels for IPv6 operations.
   - Does transition vehicle fit any existing supported management
    models?  example: dual-stack: v6/v4 <=> ipx/v4
   - Which protocol to use for NM transport in dual stack? v6/v4?
   - Protocol single vs. multi-protocol.
   - Discovery of protocol used in-band or out-of-band.
   - Receiving Events in-band and out-of-band
   - Status Monitoring of software state and node state.
   - Effects of Autoconfiguration Model selected.
   - Effects of Dynamic Updates to DNS
   - Performance Management
   - Effects of multiple addresses per non-routing node
   - Configuration Management in mixed v4/v6 environment
   - Policy Management and enforcement for the Enterprise
   - Security Management tools for the Enterprise


   3.3 Network Scenarios Examples

   Example Network A:

   A network spread across a number of geographically separated
   campuses.
   - External network operation.
   - External connectivity required.
   - Multiple sites connected by leased lines.
   - Provider independent IPv4 addresses.
   - ISP does not offer IPv6 service.

   Applications run by the enterprise:
   - Internal Web/Mail.
   - File servers.
   - Java applications.
   - Collaborative development tools.

   Internal network operation:
   - In house operation of the network.
   - DHCP (v4) is used for all desktops, servers use static address
    configuration.
   - The DHCP server to update naming records for dynamic desktops uses
    dynamic DNS.
   - A web based tool is used to enter name to address mappings for
    statically addressed servers.
   - Network management is done using SNMP.
   - All routers and switches are upgradeable to IPv6.


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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


   - Existing firewalls can be upgraded to support IPv6 rules.
   - Load balancers do not support IPv6, upgrade path unclear.

   Example Network B:

   A bank running a massive ATM network with some number of gazillions
   of transactions per second against central databases external network
   operation:
   - External connectivity not required.
   - Multiple sites connected by VPN.

   Applications run by the enterprise:
   - ATM transaction application.
   - ATM management application.

   Internal Network Operation:
   - IPsec must protect all traffic.
   - QoS policy for guaranteed delivery and urgent transactions.
   - Network is managed through in-house developed tools.


   Example Network C:

   A Security Defense network:
   - External network required at secure specific points.
   - Network is its own Internet.
   - Network must be able absorb ad-hoc creation of sub-Networks.
   - Entire parts of the Network are completely mobile.
   - All nodes on the network can be mobile (including routers)
   - Networking infrastructure mostly does not exist today with IPv4.
   - Network True High-Availability is mandatory.
   - Network must be able to be managed from ad-hoc location.
   - All nodes must be able to be configured from stateless mode.

   Applications run by the Enterprise:
   - Multimedia streaming of audio, video, and data for all nodes.
   - Data computation and analysis on stored and create data.
   - Transfer of data coordinate points to sensor devices.
   - Data and Intelligence gathering applications from all nodes.

   Internal Network Operations:
   - All packets must be secured end-2-end with encryption.
   - Intrusion Detection exists on all network entry points.
   - Network must be able to bolt on to Internet points to share
    bandwidth as required from Providers.
   - VPNs can be used but NAT can never be used.
   - Nodes must be able to access IPv4 legacy applications over IPv6
    network.



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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


  4. Support for Legacy IPv4 Nodes and Applications

   The Enterprise network will have to support the coexistence of IPv6
   and IPv4, to support legacy IPv4 applications and nodes. The
   Enterprise user has the following choices for that coexistence to
   consider today.


   4.1 IPv4 Tunnels to Encapsulate IPv6

   IPv6/IPv4 nodes want to communicate using IPv6, but an IPv4 Internal
   router is between them. These nodes could also be Mobile nodes on a
   visited network


   4.2 IPv6 Tunnels to Encapsulate IPv4

   An IPv4/IPv6 node wants to communicate with a legacy IPv4 node and is
   on an IPv6 only link and routing domain.


   4.3 IPv6 NAT to Communicate with IPv4

   An IPv6/IPv4 node wants to communicate with a legacy IPv4 only node.

   Using NAT for this point of transition will preclude end-2-end
   security, applications, and remove some benefits from the IPv6
   protocol.























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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


  5. Network Infrastructure Requirements

   The Enterprise will need to determine what network infrastructure
   they require for their deployment of IPv6. This infrastructure will
   need to be analyzed and understood as a critical resource to manage.


   5.1 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.


   5.2 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 routing topology, and any ingress and egress points to provider
    networks.  The enterprise will also need to define points of
    transition mechanism to use within that routing topology.


   5.3 Autoconfiguration

   IPv6 introduces the concept of stateless autoconfiguration in
   addition to statefull autoconfiguration.  The enterprise will have to
   determine the best method of autoconfiguration, for their network.


   5.4 Security

   Current existing mechanisms used for IPv4 to provide security need to
   be supported for IPv6 within the Enterprise.


   5.5 Applications

   Existing applications will need to be ported to support both IPv4 and
   IPv6.


   5.6 Network Management

   The addition of IPv6 and points of transition will need to be managed
   by the Enterprise network operations center.  This will affect many
   components of the network and software required on nodes.



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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003





   5.7 Address Planning

   The address space within the Enterprise will need to be defined and
   coordinated with the routing topology of the Enterprise network.












































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


6. 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 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.










































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


References

   None at this time
















































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


Acknowledgments

   The Authors would like to acknowledge input from the following: IETF
   v6ops Working Group, Brian Carpenter, Alain Durand, and Bob Hinden.















































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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


Authors/Design Team

   Send email to ent-v6net@viagenie.qc.ca to contact the design team and
   send comments on the draft to v6ops@ops.ietf.org.

   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
   Phone: 603.884.0062
   Email: jim.bound@hp.com

   Marc Blanchet

   Tony Hain

   Paul Gilbert
   Cisco Systems
   1 Penn Plaza, 5th floor,
   NY, NY 10119
   Phone: 212.714.4334
   Email: pgilbert@cisco.com

   Margaret Wasserman
   Wind River
   10 Tara Blvd, Suite 330
   Nashua, NH 03062 USA
   Phone: 603.897.2067
   Email: mrw@windriver.com

   Jason Goldschmidt
   Sun Microsystems
   M/S UMPK17-103
   17 Network Circle
   Menlo Park, CA 94025
   Phone:   (650)-786-3502
   Fax:  (650)-786-8250
   Email:jason.goldschmidt@sun.com

   Aldrin Isaac


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Internet Draft    IPv6 Enterprise Networks Scenarios         June 2003


   Bloomberg L.P.
   499 Park Avenue
   New York, NY 10022
   Phone: 212.940.1812
   Email: aisaac@bloomberg.com


   Tim Chown

   Jordi Palet Martinez
   Consulintel
   San Jose Artesano, 1
   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
   Phone: 650.625.2331
   Email: ftemplin@iprg.nokia.com





























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