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Mobile Networks Support in Mobile IPv6 draft-ernst-mobileip-v6-network-00.txt

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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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. For more information: draft-ernst-mobileip-v6-network-00.txt http://www.inrialpes.fr/planete/pub/MobiNet/mobinet.html Thierry Ernst - MOTOROLA LABS / INRIA thierry.ernst@inrialpes.fr 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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