Arrangement for traversing an IPv4 network by IPv6 mobile routers
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United States of America Patent
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Jun 23, 2009
Grant Date -
Jun 8, 2006
app pub date -
Jan 24, 2006
filing date -
Mar 10, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A source IPv6 mobile router is configured for establishing an IPv4 tunnel with destination IPv6 mobile router using a synthetic tag address, specifying a forwarding protocol, and IPv4 source and destination addresses. If an optional transport header is used (e.g, UDP port), the source port and destination port also are added to the synthetic tag address. The IPv6 packet includes a reverse routing header that enables the destination IPv6 mobile router to recover routing information for reaching the source IPv6 mobile router via the IPv4 network. Hence, all IPv4 routing information that may be needed by the destination IPv6 mobile router in sending an IPv6 reply packet back to the source IPv6 mobile router is maintained in the routing header specified in the IPv6 reply packet.
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