ARRANGEMENT FOR TRAVERSING AN IPV4 NETWORK BY IPV6 MOBILE ROUTERS

摘要

A source IPv6 mobile router is configured for establishing an IPv4 tunnel withdestination IPv6 mobile router using a synthetic tag address, specifying aforwarding protocol, and IPv4 source and destination addresses. If an optionaltransport header is used (e.g, UDP port), the source port and destination portalso are added to the synthetic tag address. The IPv6 packet includes areverse routing header that enables the destination IPv6 mobile router torecover routing information for reaching the source IPv6 mobile router via theIPv4 network. Hence, all IPv4 routing information that may be needed by thedestination IPv6 mobile router in sending an IPv6 reply packet back to thesource IPv6 mobile router is maintained in the routing header specified in theIPv6 reply packet.