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

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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 <length> 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


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

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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