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Mobile Networks Support in Mobile IPv6 draft-ernst-mobileip-v6-network-00.txt. Thierry Ernst - MOTOROLA Labs / INRIA Ludovic Bellier - INRIA project PLANETE Claude Castelluccia - INRIA project PLANETE Hong-Yon Lach - MOTOROLA Labs http://www.inrialpes.fr/planete/pub/MobiNet/mobinet.html.

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mobile networks support in mobile ipv6 draft ernst mobileip v6 network 00 txt

Mobile Networks Support in Mobile IPv6draft-ernst-mobileip-v6-network-00.txt

Thierry Ernst - MOTOROLA Labs / INRIA

Ludovic Bellier - INRIA project PLANETE

Claude Castelluccia - INRIA project PLANETE

Hong-Yon Lach - MOTOROLA Labs

http://www.inrialpes.fr/planete/pub/MobiNet/mobinet.html

mobile networks
Mobile Networks:
  • Definition:
    • Mobile Network = Mobile Router (MR) + its attached Nodes and Routers.
  • Aim of this work:
    • To provide continuous Internet connectivity to nodes located in the mobile network.
    • To offer optimal routing between Correspondent Nodes (CNs) and nodes in the mobile network (MNNs).
  • What does the Mobile IPv6 specification say:
    • Mobile IPv6 nodes may either be mobile hosts or mobile routers.
    • But no explicit mention of mobile networks.

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

mobile networks in mobile ipv6 experimentation 1 2
Mobile Networks in Mobile IPv6:Experimentation 1/2
  • Francis Dupont INRIA IPv6 Implementation under FreeBSD 3.3
  • MR has two interfaces
  • BR: home address of MR is next hop to the mobile network

< home address 3ffe:306:1130:100:eui64

  • Mobile Network attaches to foreign link :
    • MR obtains a care-of address on the foreign link
    • MR registers care-of address with HA.
    • HA performs proxy NDP on the home link for the MR’s home address.

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

mobile networks in mobile ipv6 experimentation 2 2
Packets sent from CN to MR:

HA intercepts packets addressed to MR

HA tunnels packets to MR’s care-of address

=> No Problems: works fine whether mobile is a HOST or a ROUTER

Mobile Networks in Mobile IPv6:Experimentation 2/2

Packets sent from CN to MNN:

  • BR has a route to the mobile network: MR = next hop towards MNN
  • HA intercepts packets addressed to MR
  • HA does not have an entry corresponding to the destination address of MNN
  • Packet is sent by HA to the default route (i.e. BR)
  • BR resends the packet which is intercepted by HA and so on …

=> Problems:

  • HA does not know how to route packets sent to MNN.
  • How to perform “route optimization” between CN and MNN ?

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

mobile ipv6 extensions binding updates with a network scope
Mobile IPv6 extensions: Binding Updates with a network scope
  • All nodes in the mobile network have the same network prefix

=> instruct HA and CNs to route all packets bearing a network prefix corresponding to the prefix of the the mobile network via the MR’s care-of address

  • Means:
    • A bit “Prefix Scope Registration” in the Binding Update option that tells BU contains a care-of address valid for a mobile network
    • Mobile Network Prefix Sub-Option to carry prefix of the mobile network

(i.e. the prefix of MR’s interface in the mobile network , not MR’s interface on the home link)

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|Sub-Option Type| Sub-Option Len| Prefix Length | |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| |

+ Mobile Network Prefix +

| 3ffe:306:1130:200::/64 |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

mobile ipv6 extensions impact on the current specification
Mobile IPv6 extensions: Impact on the current specification
  • Reception at the HA / CN of a Mobile Network Prefix Sub-Option:
    • add an entry in the binding cache:
      • flag “Prefix scope registration”
      • prefix length = length of the mobile network prefix
      • home address is filled with mobile network prefix
      • care-of address as usual
  • Sending Packets to MNN:
    • searching the binding cache: for records where flag “Prefix scope registration”is set, only the initial bits are compared instead of the full 128-bits address
    • packets are sent to the MNN via the care-of address of MR using a Routing Extension Header
  • Security and authentication
    • no additional problems
    • BU are not sent on behalf of another node: BUs are sent by the node that obtains the care-of address, i.e. the Mobile Router
    • the sender of the BU is authenticated
    • we assume that the Mobile Router is certified as an authorized router to send network scope BUs.

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

mobile networks in mobile ipv6 summary
Mobile Networks in Mobile IPv6: Summary
  • Future needs require to consider (potentially large) mobile networks in IPv6.
  • Problem:
    • Communication between CN and MNN is not possible.
    • No optimal route between the CN and MNN
  • This draft proposes minor Mobile IPv6 extensions to support mobile networks efficiently.
    • we propose to send BUs with a network scope
    • the care-of address carried in the BU is used for all destination address that share the same network prefix.
    • means:
      • a new Sub-Option
      • recording a prefix in the binding cache
      • searching the binding cache for a prefix

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

slide8
For more information:

draft-ernst-mobileip-v6-network-00.txt

http://www.inrialpes.fr/planete/pub/MobiNet/mobinet.html

Thierry Ernst - MOTOROLA LABS / INRIA

[email protected]

at INRIA Rhône-Alpes - project PLANETE

http://www.inrialpes.fr/planete/people/ernst/Welcome.html

48th IETF - draft-ernst-mobileip-v6-network-00.txt - July 2000

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