1. Mobility in a Dual Stack Internet
George Tsirtsis
Hesham Soliman

2. The problem - 1 MIPv4 allows IPv4 node to move in IPv4 networks
BUT…
Internet is a mixture of IPv4, IPv6 and Dual Stack networks

3. Best Case scenario today
IPv4
MN supports both MIPv4 and MIPv6
- Undesirable overhead
- Unpredictable connectivity
MIPv6
MIPv4
HAv4
IPv4/v6
MIPv4
Internet
IPv4
network
IPv6
network DS
network
MIPv6
HAv6
MIPv4
IPv4 IPv6
MIPv6
MIPv6
IPv4 IPv6
MIPv4
MIPv4
MIPv6
IPv4 IPv6
IPv4 IPv6
IPv6
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4. The problem - 2 Overheads (inefficient):
Double the signaling to HAs
Multiple local signals for handover optimizations
Inability to maintain sessions while moving (unpredictable connectivity):
MIPv6 MN in an IPv4-only network
MIPv4 MN in an IPv6-only network
Optimized Micro-Mobility Management near-impossible
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5. Solution: DS-MIP Use MIP as v4/v6 migration tool MIPv4 extensions
Use the tunneling capability of Mobile IP to forward both IPv4 and IPv6 traffic over the same Mobile IP-created tunnel.
MIPv4 extensions
Allow IPv4 and IPv6 HoAs to bind to an IPv4 CoA
MIPv6 extensions
Allow IPv4 and IPv6 HoAs to bind to an IPv4 or IPv6 CoA (IPv6 CoA may not always be available)
MNs can use either DS-MIPv4 only (initially) or DS-MIPv6 only (in future)
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6. DS-MIPv4 scenario – IPv4 dominant
MN supports DS-MIPv4
MN fully connected and mobility optimized in IPv4 and Dual Stack Networks.
IPv4
DS-MIPv4
Internet
IPv4/v6
DS-MIPv4
DS-HA
IPv4
network
IPv6
network DS
network
DS-MIPv4
DS-MIPv6
DS-MIPv4
DS-MIPv4
DS-MIPv6
IPv6
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7. DS-MIPv6 scenario – IPv6 dominant
MN supports DS-MIPv6
MN fully connected and mobility optimized in IPv6 and Dual Stack Networks.
IPv4
DS-MIPv6
Internet
IPv4/v6
DS-HA
DS-MIPv6
IPv4
network
IPv6
network DS
network
DS-MIPv4
DS-MIPv6
DS-MIPv4
DS-MIPv6
DS-MIPv6
IPv6
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8. Questions? See related drafts: Problem statement MIPv4 extensions
draft-tsirtsis-dsmip-problem-01.txt
MIPv4 extensions
draft-tsirtsis-v4v6-mipv4-00.txt
MIPv6 extensions
draft-soliman-v4v6-mipv4-00.txt (incorrect title)