Arrangement for traversing an ipv4 network by ipv6 mobile nodes

H - Electricity – 04 – L

Patent

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Details

H04L 12/28 (2006.01)

Patent

CA 2520576

A source IPv6 mobile node is configured for forwarding an IPv6 packet via an IPv4 connection with a destination IPv6 router. The IPv4 packet includes IPv4 source and destination addresses, a UDP source port and UDP destination port, and a synthetic tag address in the IPv6 destination address field. The synthetic tag address, a valid (routable) IPv6 care of address, has an address prefix routed to the IPv6 router. The address prefix specifies a forwarding protocol, the IPv4 destination address for the IPv6 router, and a site-level aggregation identifier. An address suffix for the synthetic tag address specifies the IPv4 source address, the UDP source port and UDP destination port. Hence, the synthetic tag address enables the destination IPv6 router to send an IPv6 reply packet back to the source IPv6 mobile node via the IPv4 network.

Un noeuds de mobile IPv6 (Protocole Internet, Version 6) origine est configuré pour réacheminer un paquet IPv6 via une connexion IPv4 (Protocole Internet, Version 4) établie avec un routeur IPv6 de destination. Le paquet IPv4 comporte les adresses origine et de destination IPv4, un port origine UDP et un port de destination UDP, et une adresse d'étiquette synthétique dans le champ d'adresse de destination IPv6. L'adresse d'étiquette synthétique, qui est une adresse d'hébergement IPv6 valide, c'est-à-dire acceptable pour l'acheminement, comporte un préfixe d'adresse acheminé vers le routeur IPv6. Le préfixe d'adresse spécifie un protocole de réacheminement, l'adresse de destination IPv4 destinée au routeur IPv6, et un identifiant d'agrégation au niveau du site. Un suffixe d'adresse, destiné à l'adresse d'étiquette synthétique, spécifie l'adresse origine IPv4, le port origine UDP, et le port de destination UDP. De cette façon, l'adresse d'étiquette synthétique permet au routeur IPv6 de destination de renvoyer un paquet de réponse IPv6 au noeud de mobiles IPv6 origine via le réseau IPv4.

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