Transcript PPT Version
Mobility in a Dual Stack Internet George Tsirtsis Hesham Soliman 1 The problem - 1 • MIPv4 allows IPv4 node to move in IPv4 networks • MIPv6 allows IPv6 node to move in IPv6 networks • BUT… – Internet is a mixture of IPv4, IPv6 and Dual Stack networks 2 Best Case scenario today MN supports both MIPv4 and MIPv6 - Undesirable overhead - Unpredictable connectivity IPv4 MIPv6 MIPv4 HAv4 IPv4/v6 MIPv4 Internet MIPv6 MIPv6 HAv6 IPv4 network MIPv4 IPv6 network DS network IPv4 IPv6 MIPv6 IPv4 IPv6 MIPv4 MIPv6 IPv4 IPv6 IPv4 IPv6 MIPv4 IPv6 3 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 nearimpossible 4 Solution: DS-MIP Use MIP as v4/v6 migration tool – 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) 5 DS-MIPv4 scenario – IPv4 dominant IPv4 DS-MIPv4 Internet •MN supports DS-MIPv4 •MN fully connected and mobility optimized in IPv4 and Dual Stack Networks. IPv4/v6 DS-MIPv4 IPv4 network DS-HA IPv6 network DS network DS-MIPv4 DS-MIPv6 DS-MIPv4 IPv6 DS-MIPv4 DS-MIPv6 6 DS-MIPv6 scenario – IPv6 dominant IPv4 DS-MIPv6 Internet •MN supports DS-MIPv6 •MN fully connected and mobility optimized in IPv6 and Dual Stack Networks. IPv4/v6 DS-MIPv6 IPv4 network DS-HA IPv6 network DS network DS-MIPv4 DS-MIPv6 DS-MIPv6 DS-MIPv4 DS-MIPv6 IPv6 7 Questions? • See related drafts: – Problem statement • draft-tsirtsis-dsmip-problem-01.txt – MIPv4 extensions • draft-tsirtsis-v4v6-mipv4-00.txt – MIPv6 extensions • draft-soliman-v4v6-mipv4-00.txt (incorrect title) 8