Problem Statement for Multihomed Mobile Nodes

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Problem Statement for Multihomed Mobile Nodes

• Nicolas Montavont LSIIT / ULP
• Ryuji Wakikawa Keio university
• Thierry Ernst Keio university
• Thomas Noel LSIIT / ULP

IETF 58 November 2003 - Minneapolis
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Current work on multihoming

• Multiple CoAs management
• Draft-wakikawa-mobileip-multiplecoa-02
• Multiple interfaces management
• Draft-montavont-mip6-mmi-01
• Biscasting
• Draft-elmalki-mobileip-bicasting-04
• Per-flow mobility
• Draft-soliman-mobileip-flowmove-04
• Filtering operations
• Draft-nomadv6-mobileip-filters-01
• Draft-montavont-mobileip-ha-filtering-v6-00
• Other proposals
• HIP draft-nikander-hip-mm-00
• SCTP draft-coene-sctp-multihome-04

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Whats missing

• Terminology
• Motivation
• Accurate (and common) goal
• Some issues are related to MIP (eg. several
  HoAs/CoAs) while some other not (eg. A fixed node
  can be multihomed)

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Multihomed MNs

• A MN is multihomed when it has several addresses
  to choose between
• Multi-prefixed
• Multi-interfaced
• Multi-linked

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Benefits of multihoming

• Redundancy
• Ubiquitous computing
• Load balancing
• Preference settings

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Why MIPv6

• Multihomed fixed node
• Address selection
• Policies on interfaces
• Multihomed mobile node
• Host identification multiple HoAs, multiple HAs,
  multiple CoAs
• Scenarios in draft-montavont-mobileip-pb-statement
  
• Some can be solved with solution like SCTP
• Some need MIP modification / extension

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Open issues

• MIPv6 related issues
• Extension of relation between HoAs and CoAs
• Bind multiple CoAs to the same HoA
• Need a policy to manage several CoAs bound to a
  single HoA
• Non-MIPv6 related issues
• How to simultaneously use several interfaces
• How to manage multiple HoAs
• Redirection between interfaces
• Flow spreading on multiple interfaces ?

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Last point

• In which Working Group ?
• IPv6
• MIPv6
• Multi6
• NEMO
• New one ??
• How to coordinate activities from different WGs ?