(51) Int Cl.: H04L 29/12 ( ) G06F 17/30 ( ) G06F 15/16 ( ) H04L 12/28 ( )

Transkript

1 (19) TEPZZ_84 8 B_T (11) EP B1 (12) EUROPEAN PATENT SPECIFICATION (4) Date of publication and mention of the grant of the patent: Bulletin 13/ (21) Application number: (22) Date of filing:.12.0 (1) Int Cl.: H04L 29/12 (06.01) G06F 17/ (06.01) G06F 1/16 (06.01) H04L 12/28 (06.01) (86) International application number: PCT/CN0/ (87) International publication number: WO 06/ ( Gazette 06/26) (4) A METHOD FOR UPDATING THE HOST S DNS DURING THE IPV6 STATELESS ADRESS CONFIGURATION AND THE APPARATUS THEREOF VERFAHREN ZUR AKTUALISIERUNG DES DNS DES HOSTS WÄHREND DER ZUSTANDSLOSEN IPV6-ADRESSENKONFIGURATION UND VORRICHTUNG DAFÜR PROCEDE DE MISE A JOUR DU DNS DE L HOTE PENDANT LA CONFIGURATION PASSIVE D ADRESSE IPV6 ET APPAREIL ASSOCIE (84) Designated Contracting States: DE FR GB PL () Priority: CN (43) Date of publication of application: Bulletin 07/ (73) Proprietor: Alcatel Lucent 7007 Paris (FR) (72) Inventors: BIN, Fanxiang, Shanghai 16 (CN) ZHANG, Qingshan Shanghai 16 (CN) JIANG, Yinglan Shanghai 16 (CN) YAN, RenXiang Shanghai 16 (CN) (74) Representative: Wetzel, Emmanuelle et al Alcatel-Lucent Deutschland AG Intellectual Property & Standards 704 Stuttgart (DE) (6) References cited: WO-A1-03/7627 KR-B US-A US-A THOMSON BELLCORE T NARTEN IBM S: "IPv6 Stateless Address Autoconfiguration; rfc2462.txt" IETF STANDARD, INTERNET ENGINEERING TASK FORCE, IETF, CH, 1 December 1998 ( ), XP ISSN: RENXIANG YAN ALCATEL SHANGHAI BELL: "DNS update in IPv6 stateless configuration; draft-yan-ipv6-ra-dns-00.txt" IETF STANDARD- WORKING-DRAFT, INTERNET ENGINEERING TASK FORCE, IETF, CH, January 0 (0-01-), XP ISSN: EP B1 Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). Printed by Jouve, 7001 PARIS (FR)

2 Description FIELD OF THE INVENTION [0001] The present invention relates to IPv6 applications in a communication network and a computer network, and more particularly, to a method for updating DNS(domain name server) of host in IPv6 stateless address configuration. BACKGROUND OF THE INVENTION [0002] The deployment of IPv6 has dramatically reduced address pressure in IPv4. However, a 128-bit IPv6 address is not so easy to remember as an IPv4 address, and domain names will be put into more extensive applications in IPv6. Currently, there are two methods for configuring domain name information in IPv6: (1) to manually add the mapping relation between an address and a domain name to a DNS server; (2) to automatically update a domain name using FQDN (fully qualified domain name) options in the DHCP protocol (dynamic host configuration protocol). Method (1) needs manual intervention and is thus hardly competent for a large number of hosts. Method (2) is merely applicable to hosts that configure addresses using DHCP. [0003] There are two kinds of address configuration manners in IPv6, namely stateful address configuration and stateless address configuration. The stateful address configuration manner means configuration of address and other information by the DHCP protocol. Similar to IPv4, this method needs a DHCP server from which the host obtains information on address configuration in client/server mode. [0004] The stateless address auto-configuration is a characteristic address configuration manner for IPv6. In this manner, the network interface requiring address configuration obtains a link local address using neighbor discovery mechanism first, and after obtaining the link local address, the network interface sends a router solicitation (hereinafter referred to as RS) message to a full router multicast address. The local router transfers the prefix of one or more global addresses to the host by router advertisement (hereinafter referred to as RA) message. Finally, the host combines the obtained address prefix and the interface identifier to get a global address. The router may also periodically send a RA message, and the host, upon acquisition of the message, configures the interface s global address in accordance with the address prefix. [000] The stateless address configuration method used in IPv6 is a distinct advantage of IPv6, which enables the host device to obtain the IPv6 address without manual configuration or DHCP server maintenance. [0006] However, there is so far no method for automatically updating DNS for a host that configures addresses using a stateless address configuration method. The existing IPv6 router advertisement based DNS auto-configuration is an obsolete draft and has following deficiencies not to be ignored: [0007] On the one hand, since this method does not specify the matching relation between domain name suffix information and address prefix, if the router has issued a plurality of address prefixes, then the host cannot correctly identify the matching relation; [0008] On the other hand, it is the host that automatically updates a DNS domain name according to this method, which will cause security pitfalls. Even if security guarantee is implemented using the DNSsec method, corresponding authentication information needs to be installed on each host, which will make the DNS updating very complicated. [0009] XP comprises information on the IPV6 stateless address auto configuration, wherein a host takes steps in deciding how to auto configure its interfaces in IP version 6. The auto configuration process includes creating a link-local address and verifying its uniqueness in a link, determining what information should be auto configured and in the case of addresses, whether they should be obtained through the stateless mechanism, the stateful mechanism or both. SUMMARY OF THE INVENTION 0 [00] It is an object of the present invention to provide a reliable and effective method for updating DNS of host in IPv6 stateless address configuration, which method enables the host to correctly identify the matching relation between domain name suffix information and address prefix, and achieves the negotiation of updating DNS domain name between the host and the router. Since DNS updating is performed by a router instead of the host, the DNS updating would become simple and safe. [0011] To achieve the object, the basic idea of the present invention is to define a new RS/RA option - "host FQDN" option which is used to enable the host to negotiate with the router to update DNS domain name, i.e. either the host or the router may implement the updating. Meanwhile, it is to specify the matching relation between domain name suffix information and address prefix in the RA message so that the host can easily identify which address matches which domain name suffix. [0012] To this end, the present invention provides a method for updating DNS of host in IPv6 stateless address 2

3 1 2 3 configuration, characterized by, adding an option in the RS message sent by a host and/or RA message sent by a router, said option including information for negotiation of updating DNS of host; based on said information, the host negotiating with the router to determine whether the host or the router register, the mapping between the global address of the host and the full domain name of the host, to a DNS server, to complete updating the DNS of the host. [0013] The present invention further provides a method for updating DNS of host in IPv6 stateless address configuration, characterized by, adding an option in the RA message sent by a router to a host, said option in the RA message including domain name suffix information of the host, in the RA message, the option being placed after corresponding one or more address prefix option(s), to indicate that the option and said one or more address prefix form a match, based on the match, the host using the domain name suffix information to form its full domain name, using the matched address prefix to construct a global address, and mapping the full domain name to the global address, the host or the router registering, the mapping between the global address of the host and the full domain name of the host, to a DNS server, to complete updating the DNS of the host. [0014] The present invention further provides an IPv6 stateless address configuration system, comprising a host and a router, said host including a network interface module, a processing module, and a memory module, the router including a network interface module, a processing module, and a memory module, characterized in that, the processing module of the host sends a RS message via the network interface module of the host, the processing module of the router sends a RA message via the network interface module of the router, the RS message and/or the RA message includes an option including information for negotiation of updating DNS of host; by means of the respective processing modules, network interface modules, and memory modules, based on said information, the host negotiates with the router to determine whether the host or the router register, the mapping between the global address of the host and the full domain name of the host, to a DNS server, to complete updating the DNS of the host. [001] The present invention further provides a host for use in an IPv6 stateless address configuration system, including a network interface module, a processing module, and a memory module, said system further comprising a router including a network interface module, a processing module, and a memory module, characterized in that, the processing module of the host sends a RS message via the network interface module of the host, and receives a RA message sent by the processing module of the router via the network interface module of the router, the RS message and/or the RA message includes an option including information for negotiation of updating DNS of host; based on said information, the host via its processing module, network interface module, and memory module, negotiates with the router via its processing module, network interface module, and memory module, to determine whether the host or the router register, the mapping between the global address of the host and the full domain name of the host, to a DNS server, to complete updating the DNS of the host. [0016] The present invention further provides a router for use in an IPv6 stateless address configuration system, including a network interface module, a processing module, and a memory module, said system further comprising a host including a network interface module, a processing module, and a memory module, characterized in that, corresponding to a RS message sent by the processing module of the host via the network interface module of the host, the processing module of the router sends a RA message via the network interface module of the router, the RS message and/or the RA message includes an option including information for negotiation of updating DNS of host; based on said information, the router via its processing module, network interface module, and memory module, negotiates with the host via its processing module, network interface module, and memory module, to determine whether the host or the router register, the mapping between the global address of the host and the full domain name of the host, to a DNS server, to complete updating the DNS of the host. Brief Description on the Drawings 4 [0017] Hereinafter, the preferred embodiments of the present invention will be described with reference to the accompanying drawings, wherein: Fig. 1 is a schematic view of a working flow for updating DNS by an IPv6 router in the present invention; 0 Fig. 2 is a schematic view of a working flow for updating DNS by a host in the present invention; and Fig. 3 is a schematic block diagram of a host and router according to the present invention. Description of the Preferred Embodiments [0018] Fig. 3 depicts a schematic block diagram of a host and router according to the present invention, in which a host 31 and a router 32 receives and sends RS messages and RA messages via network interface modules 311 and 321. Processing modules 312, 322 and memory modules 313, 323 of both host 31 and router 32 take part in respective 3

4 operations. [0019] The DNS updating may be implemented by host 31 or by router 32 instead of host 31, the DNS updating includes updating the mapping from domain name to address (forward mapping) and updating the mapping from address to domain name (reverse mapping). Theoretically, host 31 and router 32 may implement forward updating, reverse updating or both forward and reverse updating. However, not all matches make sense in reality. In the present invention, assuming the working modes of updating DNS include the following: 1. the IPv6 host updates AAAA resource records (i.e. forward mapping) and PTR resource records (i.e. reverse mapping) 2. the IPv6 router updates AAAA resource records (i.e. forward mapping) and PTR resource records (i.e. reverse mapping) 1 [00] The difference between mode 1 and mode 2 is whether the host or the router updates AAAA resource records and PTR resource records. The definition of these two modes is out of consideration for security. The negotiation of updating DNS to be mentioned later refers, in particular, to the negotiation of updating AAAA resource records and PTR resource records. "Host FQDN" Option Definition of "Host FQDN" Option 2 [0021] In order to implement the updating of DNS domain name, the router or the host needs to know the full domain name (FQDN) corresponding to a certain IPv6 address. "Host FQDN" option enables the host and the router to know such information and negotiate who will update DNS based on the flag bit therein. [0022] This option can only be contained in the RS and RA message, with a smallest length of four bytes. [0023] The format is as follows: 3 4 Type: an 8-bit value for indicating this option Length: the length of flag bit (1) + the length of domain name Flag field: for negotiation of updating DNS between the host and the router and for defining the number of matches Domain name: partial domain name or full domain name Definition of Flag Field 0 [0024] The flag field is for negotiation of updating DNS domain name between host 31 and router 32 and for defining the number of matches. [002] The flag field is defined as follows: [0026] The RV field is a reserved bit and may be used for future extension. 4

5 [0027] MNUM, the field for the number of matches: its size is 4 bits and used for defining the number of address prefixes which a FQDN option can match at most, and its value ranges between 1 and 16. [0028] Use of R bit: if the router desires to update DNS instead of the host, then it sets R bit to 1 when sending "host FQDN" option, otherwise it sets R bit to 0. [0029] Use of H bit: the host notifies the router to update DNS instead of itself by setting H bit. When R bit is set to 0 and the host is unable to perform DNS registration, the host will set R bit to 1 and H bit to 1 also in the loopback RS message. Otherwise, the host sets R bit to 0 and H bit to 0 also. 1 Illustration of Domain Name in Option [00] The domain name field in the option can transmit partial domain name or full domain name. The host uses full domain name or partial domain name, namely host name; when carrying this option in the RS message, whereas the router uses partial domain name, namely domain name suffix, when carrying this option in the RA message. Use of "Host FQDN" Option [0031] Host 31 carries "host FQDN" option only when processing module 312 sends the RS message via network interface module 311. [0032] Router 32 carries "host FQDN" option only when processing module 322 sends the RA message via network interface module 321. When the router sends "host FQDN" option, the "host FQDN" option must match a certain address prefix option by means of processing module 322 and memory module 323, whereas it is not necessary for an address prefix to match a certain "host FQDN" option. The "host FQDN" option must be placed after one or more address prefix options, to indicate that it and the one or more address prefixes form a match. The MNUM field in the option is used for indicating the number of address prefixes that match the option, and unmatched address prefixes must be placed after the matched address prefixes and the "host FQDN" option. Such a method enables the host to easily identify the matching between address prefix and domain name suffix and further enables the host to map its full domain name to the global address constructed using the matched address prefix, so as to update the mapping when processing module 312 of the host updates DNS via network interface module 311. Such a matching method may also be applicable to other methods for updating DNS with or without negotiation. [0033] If the router is set to update DNS, then it may or may not carry domain name field when sending the "host FQDN." Upon receipt of the RA message, the host, by means of processing module 312 and memory module 313, maps the address generated by the address prefix to the domain name in the "host FQDN" option that matches the address prefix. The mapping may be updated by the host or the router based on the R and H bits in the set flag field. [0034] Host 31 receives a RA message via network interface 311. The RA message may be an acknowledgement for the RS message sent from the router 32 to the host or may be a periodic RA broadcast of the router. The router will set the corresponding flag bit by processing module 322 based on the configuration condition thereof. [003] If host 31 supports the "host FQDN" option, then it will carry the "host FQDN" option in the RS message, and sets the corresponding flag bit by the processing module 312 based on the method in the flag bit definition. [0036] If R bit is 1, i.e. it is the router that updates DNS, then the host will send a RS message carrying the "host FQDN" to the router, and the source address thereof must be the address generated by the address prefix matching domain name. If there are more than two matches, then it must send a RS message for each match. Afterwards, the router updates DNS based on the corresponding mapping, as depicted in Fig. 1. If R is 0, then the host that supports the DNS domain name registration must register domain name by itself, i.e. maps the full domain name to the global address constructed by the matched address prefix and then updates the mapping, as depicted in Fig. 2. The host that does not support the DNS domain name registration may notify the router to perform registration for it by sending the "host FQDN" option whose H bit and R bit are both set to 1. [0037] various alterations and modifications may be made without departing from the scope of the present invention. It is to be understood that the present invention is not limited to the specific embodiments and the scope thereof is as defined in the appended claims. Claims 1. A method for updating an address of a host (31) to a domain name server, DNS, in IPv6 stateless address autoconfiguration, characterized by, adding an option in the router solicitation, RS, message sent by a host (31) and/or router advertisement, RA, message sent by a router (32), said option including information for negotiation of updating domain name server, DNS, of host (31); based on said information, the host (31) negotiating with the router (32) to determine whether the host (31) or the router (32) register, the mapping between the global address of the host (31)

6 and the full domain name of the host (31), to a domain name server, DNS, server, to complete updating the domain name server, DNS, of the host (31). 2. The method according to claim 1, characterized in that the router (32) updates the domain name server, DNS, based on the information for negotiation. 3. The method according to claim 1, characterized in that the host (31) updates the domain name server, DNS, based on the information for negotiation. 4. The method according to claim 3, characterized in that if the host (31) does not support the domain name server, DNS, updating, then the host (31) will notify the router (32) through the information for negotiation to update domain name server, DNS. 1. The method according to claim 1, characterized in that the option in the router advertisement, RA, message includes domain name suffix information of the host (31), in the router advertisement, RA, message, the option being placed after corresponding one or more address prefix, to indicate that the option and said one or more address prefix form a match. 6. The method according to claim, characterized in that the option includes information for indicating the number of address prefixes that match the option. 7. The method according to claim, characterized in that unmatched address prefix options are placed after matched address prefix options and the option The method according to any one of claims to 7, characterized in that the router advertisement, RA, message may be acknowledgement for the router solicitation, RS, message sent from the router (32) to the host (31) or may be periodic router advertisement, RA, broadcast of the router (32). 9. The method according to claim 8, characterized in that the host (31) completes the mapping between the global address and the full domain name thereof based on the router advertisement, RA, message, and the host (31) or the router (32) updates the domain namer server, DNS, based on the information for negotiation The method according to claim 9, characterized in that the host (31) updates the domain name server, DNS, based on the information for negotiation. 11. The method according to claim 9, characterized in that based on the information for negotiation, the router (32) updates the DNS, the host(31) sends the router solicitation, RS, message to the router(32), and the option in the router solicitation, RS, message further includes the full domain name of the host (31). 12. The method according to claim 9, characterized in that based on the information for negotiation, the router (32) updates the domain name server, DNS, the host (31) completes mapping the global address to the host domain name thereof and sends the router solicitation, RS, message, in which the option further includes the host name of the host (31), to the router (32), and the router (32) completes mapping the global address to the full domain name thereof. 13. The method according to claim 2, characterized in that upon receipt of the router advertisement, RA, message, the host (31) completes mapping the global address to the host domain name thereof and sends the router solicitation, RS, message, in which the option further includes the host name of the host (31), to the router (32), and the router (32) completes mapping the global address to the full domain name thereof. 14. A method for updating an address of a host (31) to a domain name server, DNS, in IPv6 stateless address configuration, characterized by, adding an option in the router advertisement, RA, message sent by a router (32) to a host (31), said option in the router advertisement, RA, message including domain name suffix information of the host (31), in the router advertisement, RA, message, the option being placed after corresponding one or more address prefix option(s), to indicate that the option and said one or more address prefix form a match, based on the match, the host(31) using the domain name suffix to form its full domain name, using the matched address prefix to construct a global address, and mapping the full domain name to the global address, the host (31) or the router (32) registering, the mapping between the global address of the host (31) and the full domain name of the host (31), 6

7 to a domain name server, DNS, server, to complete updating the domain name server, DNS, of the host(31). 1. The method according to claim 14, characterized in that the option includes information for indicating the number of address prefixes that match the option. 16. The method according to claim 14, characterized in that unmatched address prefix options are placed after matched address prefix options and the option An IPv6 stateless address configuration system, comprising a host (31) and a router (32), said host (31) including a network interface module (311), a processing module (312), and a memory module (313), the router(32) including a network interface module (321), a processing module (322), and a memory module (323), characterized in that, the processing module (312) of the host (31) is adapted to send a router solicitation, RS, message via the network interface module (311) of the host (31), the processing module(322) of the router (32) is adapted to send a router advertisement, RA, message via the network interface module (321) of the router (32), the router solicitation, RS, message and/or the router advertisement, RA, message includes an option including information for negotiation of updating domain name server, DNS, of host (31); by means of the respective processing modules (312, 322), network interface modules (311, 321), and memory modules (313, 323), based on said information, the host (31) is adapted to negotiate with the router (32) to determine whether the host (31) or the router (32) register, the mapping between the global address of the host (31) and the full domain name of the host (31), to a domain name server, DNS, server, to complete updating the domain name server, DNS, of the host (31) A host (31) for use in an IPv6 stateless address configuration system, including a network interface module, a processing module (312), and a memory module (313), said system further comprising a router (32) including a network interface module, a processing module (312), and a memory module (313), characterized in that, the processing module (312) of the host (31) is adapted to send a router solicitation, RS, message via the network interface module of the host (31), and to receive a router advertisement, RA, message sent by the processing module (312) of the router (32) via the network interface module of the router (32), the RS message and/or the RA message includes an option including information for negotiation of updating DNS of host (31); based on said information, the host (31) is adapted to via its processing module (312), network interface module, and memory module (313), negotiate with the router (32) via its processing module (312), network interface module, and memory module (313), to determine whether the host (31) or the router (32) register, the mapping between the global address of the host (31) and the full domain name of the host (31), to a DNS server, to complete updating the DNS of the host (31) A router (32) for use in an IPv6 stateless address auto-configuration system, said router (32) including a network interface module (321), a processing module (322), and a memory module (323), said system further comprising a host (31), said host (31) including a network interface module (311), a processing module (312), and a memory module(313), characterized in that, corresponding to a router solicitation, RS, message sent by the processing module (312) of the host (31) via the network interface module of the host (31), the processing module (322) of the router (32) is adapted to send a router advertisement, RA, message via the network interface module of the router (32), the RS message and/or the RA message includes an option including information for negotiation of updating DNS of host (31); based on said information, the router (32) via its processing module (322), network interface module (321), and memory module (323), is adapted to negotiate with the host (31) via its processing module (312), network interface module (311), and memory module (313), to determine whether the host (31) or the router register, the mapping between the global address of the host (31) and the full domain name of the host (31), to a DNS server, to complete updating the DNS of the host (31). Patentansprüche 0 1. Verfahren zur Aktualisierung einer Adresse eines Hosts (31) eines Domain-name Servers, DNS, in einer zustandslosen IPv6-Adressenselbstkonfiguration, gekennzeichnet durch das Hinzufügen einer Option in der von einem Host (31) gesendeten Router-Solicitation- bzw. RS-Nachricht und/oder von einem Router (32) gesendeten Router- Advertisement- bzw. RA-Nachricht, wobei die besagte Option Informationen zur Verhandlung der Aktualisierung des Domain-Name-Servers, DNS, des Hosts (31) umfasst; wobei der Host (31) auf der Basis der besagten Informationen mit dem Router (32) verhandelt, um zu bestimmen, ob der Host (31) oder der Router (32) die Abbildung zwischen der globalen Adresse des Hosts (31) und des kompletten Domain-Namens des Hosts (31) auf einem Domain-Name-Server, DNS, registrieren soll, um die Aktualisierung des Domain-Name-Servers, DNS, des Hosts (31) abzuschließen. 7

8 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Router (32) den Domain-Name-Server, DNS, auf der Basis der Verhandlungsinformationen aktualisiert. 3. Verfahren nach Anspruch 1, dadurch gekennzeichet, dass der Host (31) den Domain-Name-Server, DNS, auf der Basis der Verhandlungsinformationen aktualisiert Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass, wenn der Host (31) die Domain-Name-Server- bzw. DNS-Aktualisierung nicht unterstützt, der Host (31) den Router (32) anhand der Verhandlungsinformationen benachrichtigt, um den Domain-Name-Server, DNS, zu aktualisieren.. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Option in der Router-Advertisement- bzw. RA- Nachricht Domain-Name-Suffixinformationen des Hosts (31) enthält, wobei die Option hinter dem entsprechenden einen oder mehreren Adress-Präfix(en) eingefügt wird, um anzuzeigen, dass die Option and das besagte eine oder die mehreren Adress-Präfix(e) übereinstimmen. 6. Verfahren nach Anspruch, dadurch gekennzeichnet, dass die Option Informationen zur Angabe der Anzahl von Adress-Präfixen, die mit der Option übereinstimmen, umfasst. 7. Verfahren nach Anspruch, dadurch gekennzeichnet, dass nicht übereinstimmende Adress-Präfix-Optionen hinter übereinstimmenden Adress-Präfix-Optionen und der Option eingefügt werden Verfahren nach einem beliebigen der Ansprüche bis 7, dadurch gekennzeichnet, dass die Router-Advertisementbzw. RA-Nachricht die Betätigung für die von dem Router (32) an den Host (31) gesendete Router-Solicitation- bzw. RS-Nachricht oder eine periodische Router-Advertisement- bzw. RA-Nachricht-Broadcastsendung des Routers (32) sein kann. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der Host (31) das Abbilden zwischen der globalen Adresse und dem kompletten Domain-Namen davon basierend auf der Router-Advertisement- bzw. RA-Nachricht abschließt und der Host (31) oder der Router (32) den Domain-Name-Server, DNS, auf der Basis der Verhandlungsinformationen aktualisiert.. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass der Host (31) den Domain-Name-Server, DNS, auf Basis der Verhandlungsinformationen aktualisiert Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass, basierend auf den Verhandlungsinformationen, der Router (32) den DNS aktualisiert, der Host (31) die Router-Solicitation- bzw. RS-Nachricht an den Router (32) sendet und die Option in der Router-Solicitation- bzw. RS-Nachricht weiterhin den kompletten Domain-Namen des Hosts (31) umfasst. 12. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass, basierend auf den Verhandlungsinformationen, der Router (32) den Domain-Name-Server, DNS, aktualisiert, der Host (31) das Abbildern der globalen Adresse auf den Domain-Namen des Hosts abschließt und die Router-Solicitation- bzw. RS-Nachricht, in welcher die Option weiterhin den Hostnamen des Hosts (31) umfasst, an den Router (32) sendet und der Router (32) das Abbilden der globalen Adresse auf den kompletten Domain-Namen davon abschließt. 13. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Host (31) nach Empfang der Router-Advertisement- bzw. RA-Nachricht das Abbilden der globalen Adresse auf den Domain-Namen des Hosts davon abschließt und die Router-Solicitation- bzw. RS-Nachricht, in welcher die Option weiterhin den Hostnamen des Hosts (31) umfasst, an den Router (32) sendet und der Router (32) das Abbilden der globalen Adresse auf den kompletten Domain-Namen davon abschließt. 14. Verfahren zur Aktualisierung einer Adresse eines Hosts (31) eines Domain-Name-Servers, DNS, in einer zustandslosen IPv6-Adressenselbstkonfiguration, gekenntzeichnet durch das Hinzufügen einer Option in der von einem Router (32) an einen Host (31) gesendeten Router-Advertisement- bzw. RA-Nachricht, wobei die besagte Option in der Router-Advertisement- bzw. RA-Nachricht Domain-Name-Suffixinformationen des Hosts (31) umfasst, wobei die Option in der Router-Advertisement- bzw. RA-Nachricht hinter einer oder mehreren entsprechenden Adress- Präfixinformation(en) eingefügt wird, um anzuzeigen, dass die Option und die besagte eine oder das besagte eine oder die besagten mehreren Adress-Präfix(e) übereinstimmen, wobei der Host (31) auf der Basis der Übereinstim- 8

9 mung das Domain-Name-Suffix verwendet, um seinen kompletten Domain-Namen zu bilden, das übereinstimmende Adress-Präfix verwendet, um eine globale Adresse zu konstruierten, und den kompletten Domain-Namen auf die globale Adresse abbildet, wobei der Host (31) oder der Router (32) die Abbildung zwischen der globalen Adresse des Hosts (31) auf einen Domain-Name-Server, DNS, registriert, um die Aktualisierung des Domain-Name-Servers, DNS, des Hosts (31) abzuschließen. 1. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass die Option Informationen zur Angabe der Anzahl von Adress-Präfixen, welche mit der Option übereinstimmen, umfasst. 16. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass nicht übereinstimmende Adress-Präfix-Optionen hinter übereinstimmenden Adress-Präfix-Optionen und der Option eingefügt werden System zur zustandslosen IPv6-Adressenkonfiguration, umfassend einen Host (31) und einen Router (32), wobei der besagte Host (31) ein Netzwerkschnittstellenmodul (311), ein Verarbeitungsmodul (312) und ein Speichermodul (313) umfasst, wobei der Router (32) ein Netzwerkschnittstellenmodul (321), ein Verarbeitungsmodul (322) und ein Speichermodul (323) umfasst, dadurch gekennzeichnet, dass das Verarbeitungsmodul (312) des Hosts (31) dazu ausgelegt ist, eine Router-Solicitation- bzw. RS-Nachricht über das Netzwerkschnittstellenmodul (311) des Hosts (31) zu senden, wobei das Verarbeitungsmodul (322) des Routers (32) dazu ausgelegt ist, eine Router-Advertisement- bzw. RA-Nachricht über das Netzwerkschnittstellenmodul (321) des Routers (32) zu senden, wobei die Router- Solicitation- bzw. RS-Nachricht und/oder die Router-Advertisement- bzw. RA-Nachricht eine Option mit Verhandlungsinformationen zur Aktualisierung des Domain-Name-Servers, DNS, des Hosts (31) enthält; wobei, anhand der entsprechenden Verarbeitungsmodule (312, 322), Netzwerkschnittstellenmodule (311, 321) und Speichermodule (313, 323) und basierend auf den besagten Informationen, der Host (31) dazu ausgelegt ist, mit dem Router (32) zu verhandeln, um zu bestimmen, ob der Host (31) oder der Router (32) die Abbildung zwischen der globalen Adresse des Hosts (31) und dem kompletten Domain-Namen des Hosts (31) auf einem Domain-Name-Server, DNS, registrierten soll, um die Aktualisierung des Domain-Name-Servers, DNS, des Hosts (31) abzuschießen Host (31) zur Verwendung in einem zustandslosen IPv6-Adressenkonfigurationssystem, umfassend ein Netzwerkschnittstellenmodul, ein Verarbeitungsmodul (312) und ein Speichermodul (313), wobei das besagte System weiterhin einen Router (32) mit einem Netzwerkschnittstellenmodul, einem Verarbeitungsmodul (322) und einem Speichermodul (323) umfasst, dadurch gekennzeichnet, dass das Verarbeitungsmodul (312) des Hosts (31) dazu ausgelegt ist eine Router-Solicitation- bzw. RS-Nachricht über das Netzwerkschnittstellenmodul des Hosts (31) zu senden und eine von dem Verarbeitungsmodul (322) des Routers (32) über das Netzwerkschnittstellenmodul des Routers (32) gesendete Router-Advertisement- bzw. RA-Nachricht zu empfangen, wobei die RS-Nachricht und/ oder die RA-Nachricht eine Option mit Informationen zur Verhandlung der DNS-Aktualisierung des Hosts (31) umfasst; wobei, basierend auf den besagten Informationen, der Host (31) dazu ausgelegt ist, über sein Verarbeitungsmodul (312), sein Netzwerkschnittstellenmodul und sein Speichermodul (313) mit dem Router (32) über sein Verarbeitungsmodul (322), sein Netzwerkschnittstellenmodul und sein Speichermodul (323) zu verhandeln, um zu bestimmen, ob der Host (31) oder der Router (32) die Abbildung zwischen der globalen Adresse des Hosts (31) und dem kompletten Domain-Namen des Hosts (31) auf einem DNS-Server registrieren soll, um die Aktualisierung des DNS des Hosts (31) zu vollenden Router (32) zur Verwendung in einem zustandslosen IPv6-Adressenselbstkonfigurationssystem, wobei der besagte Router (32) ein Netzwerkschnittstellenmodul (321), ein Verarbeitungsmodul (322) und ein Speichermodul (323) umfasst, wobei das besagte System weiterhin eignen Host (31) umfasst, wobei der besagte Host (31) ein Netzwerkschnittstellenmodul (311), ein Verarbeitungsmodul (312) und ein Speichermodul (313) umfasst, dadurch gekennzeichnet, dass, entsprechend einer von dem Verarbeitungsmodul (312) eines Hosts (31) über das Netzwerkschnittstellenmodul des Hosts (31) gesendeten Router-Solicitation- bzw. RS-Nachricht, das Verarbeitungsmodul (322) des Routers (32) dazu ausgelegt ist, eine Router-Advertisement- bzw. RA-Nachricht über das Netzwerkschnittstellenmodul des Routers (32) zu senden, wobei die RS-Nachricht und/oder die RA-Nachricht eine Option mit Informationen zur Verhandlung der DNS-Aktualisierung des Hosts (31) umfasst; wobei, basierend auf den besagten Informationen, der Router (32) dazu ausgelegt ist, über sein Verarbeitungsmodul (322), sein Netzwerkschnittstellenmodul (321) und sein Speichermodul (323) mit dem Host (31) über sein Verarbeitungsmodul (312), sein Netzwerkschnittstellenmodul (311) und sein Speichermodul (313) zu verhandeln, um zu bestimmen, ob der Host (31) oder der Router die Abbildung zwischen der globalen Adresse des Hosts (31) und dem kompletten Domain-Namen des Hosts (31) auf einem DNS-Server registrieren soll, um die Aktualisierung des DNS des Hosts (31) zu vollenden. 9

10 Revendications 1. Procédé de mise à jour d une adresse d un hôte (31) sur un serveur de nom de domaine, DNS, dans une autoconfiguration d adresse sans état IPv6, caractérisé par l ajout d une option dans le message de sollicitation de routeur, RS, envoyé par un hôte (31) et/ou le message d annonce de routeur, RA, envoyé par un routeur (32), ladite option contenant des informations pour la négociation de la mise à jour du serveur de nom de domaine, DNS, de l hôte (31) ; en se basant sur ladite information, l hôte (31) négociant avec le routeur (32) pour déterminer si l hôte (31) ou le routeur (32) enregistre la correspondance de l adresse globale de l hôte (31) avec le nom de domaine complet de l hôte (31) sur un serveur de nom de domaine, DNS, pour terminer la mise à jour du serveur de nom de domaine, DNS, de l hôte (31). 2. Procédé selon la revendication 1, caractérisé en ce que le routeur (32) met à jour le serveur de nom de domaine, DNS, en se basant sur les informations pour la négociation Procédé selon la revendication 1, caractérisé en ce que l hôte (31) met à jour le serveur de nom de domaine, DNS, en se basant sur les informations pour la négociation. 4. Procédé selon la revendication 3, caractérisé en ce que si l hôte (31) ne prend pas en charge la mise à jour du serveur de nom de domaine, DNS, l hôte (31) notifiera alors le routeur (32) de mettre à jour le serveur de nom de domaine, DNS, par le biais des informations pour la négociation. 2. Procédé selon la revendication 1, caractérisé en ce que l option dans le message d annonce de routeur, RA, contient l information de suffixe de nom de domaine de l hôte (31) dans le message d annonce de routeur, RA, l option étant placée après un ou plusieurs préfixes d adresse correspondant pour indiquer que l option et lesdits un ou plusieurs préfixes d adresse forment une correspondance. 6. Procédé selon la revendication caractérisé en ce que l option contient des informations pour indiquer le nombre de préfixes d adresse qui correspondent avec l option. 7. Procédé selon la revendication caractérisé en ce que les options de préfixe d adresse sans correspondance sont placées après les options de préfixe d adresse avec correspondance et l option Procédé selon l une quelconque des revendications à 7, caractérisé en ce que le message d annonce de routeur, RA, peut être une conformation de réception du message de sollicitation du routeur, RS, envoyé du routeur (32) à l hôte (31) ou peut être la diffusion périodique d annonce de router, RA, du routeur (32). 9. Procédé selon la revendication 8, caractérisé en ce que l hôte (31) termine la mise en correspondance de l adresse globale avec le nom de domaine complet de celui-ci en se basant sur le message d annonce de router, RA, et l hôte (31) ou le routeur (32) met à jour le serveur de nom de domaine, DNS, en se basant sur les informations pour la négociation.. Procédé selon la revendication 9, caractérisé en ce que l hôte (31) met à jour le serveur de nom de domaine, DNS, en se basant sur les informations pour la négociation Procédé selon la revendication 9, caractérisé en ce qu en se basant sur les information pour la négociation, le routeur (32) met à jour le DNS, l hôte (31) envoie le message de sollicitation de routeur, RS, au routeur (32), et l option dans le message de sollicitation de routeur, RS, comprend en outre le nom de domaine complet de l hôte (31) Procédé selon la revendication 9, caractérisé en ce qu en se basant sur les informations pour la négociation, le routeur (32) met à jour le serveur de nom de domaine, DNS, l hôte (31) termine la mise en correspondance de l adresse globale avec le nom de domaine complet de celui-ci et envoie le message de sollicitation de routeur, RS, dans lequel l option contient en outre le nom d hôte de l hôte (31), au routeur (32) et le routeur (32) termine la mise en correspondance de l adresse globale avec le nom de domaine complet de celui-ci. 13. Procédé selon la revendication 2, caractérisé en ce que sur réception du message d annonce de routeur, RA, l hôte (31) termine la mise en correspondance de l adresse globale avec le nom de domaine complet de celui-ci et envoie le message de sollicitation de routeur, RS, dans lequel l option contient en outre le nom d hôte de l hôte (31), au routeur (32) et le routeur (32) termine la mise en correspondance de l adresse globale avec le nom de domaine

11 complet de celui-ci. 14. Procédé de mise à jour d une adresse d un hôte (31) sur un serveur de nom de domaine, DNS, dans une configuration d adresse sans état IPv6, caractérisé par l ajout d une option dans le message d annonce de routeur, RA, envoyé par un routeur (32) à un hôte (31), ladite option dans le message d annonce de routeur, RA, contenant l information de suffixe de nom de domaine de l hôte (31), l option dans le message d annonce de routeur, RA, étant placée après une ou plusieurs option(s) de préfixe d adresse correspondantes pour indiquer que l option et lesdits un ou plusieurs préfixes d adresse forme(nt) une correspondance, l hôte (31), en se basant sur la correspondance, utilisant le suffixe de nom de domaine pour former son nom de domaine complet, utilisant le préfixe d adresse mis en correspondance pour construire une adresse globale et mettant en correspondance le nom de domaine complet avec l adresse globale, l hôte (31) ou le routeur (32) enregistrant la mise en correspondance de l adresse globale de l hôte (31) avec le nom de domaine complet de l hôte (31) sur un serveur de nom de domaine, DNS, pour terminer la mise à jour du serveur de nom de domaine, DNS, de l hôte (31) Procédé selon la revendication 14 caractérisé en ce que l option contient des informations pour indiquer le nombre de préfixes d adresse qui correspondent avec l option Procédé selon la revendication 14 caractérisé en ce que les options de préfixe d adresse sans correspondance sont placées après les options de préfixe d adresse avec correspondance et l option. 17. Système de configuration d adresse sans état IPv6, comprenant un hôte (31) et un routeur (32), ledit hôte (31) contenant un module d interface de réseau (311), un module de traitement (312) et un module de mémoire (313), le routeur (32) contenant un module d interface de réseau (321), un module de traitement (322) et un module de mémoire (323), caractérisé en ce que le module de traitement (312) de l hôte (31) est adapté pour envoyer un message de sollicitation de routeur, RS, par le biais du module d interface de réseau (311) de l hôte (31), le module de traitement (322) du routeur (32) est adapté pour envoyer un message d annonce de routeur, RA, par le biais du module d interface de réseau (321) du routeur (32), le message de sollicitation du routeur, RS, et/ou le message d annonce du routeur, RA, contient une option contenant des informations pour la négociation de la mise à jour du serveur de nom de domaine, DNS, de l hôte (31) ; au moyen des modules de traitement (312, 322), modules d interface de réseau (311, 321) et modules de mémoire (313, 323) respectifs, en se basant sur lesdites informations, l hôte (31) est adapté pour négocier avec le routeur (32) pour déterminer si l hôte (31) ou le routeur (32) enregistre la correspondance de l adresse globale de l hôte (31) avec le nom de domaine complet de l hôte (31) sur un serveur de nom de domaine, DNS, pour terminer la mise à jour du serveur de nom de domaine, DNS, de l hôte (31). 18. Hôte (31) destiné à être utilisé dans un système de configuration d adresse sans état IPv6, comprenant un module d interface de réseau, un module de traitement (312) et un module de mémoire (313), ledit système comprenant en outre un routeur (32) contenant un module d interface de réseau, un module de traitement (322) et un module de mémoire (323), caractérisé en ce que le module de traitement (312) de l hôte (31) est adapté pour envoyer un message de sollicitation de routeur, RS, par le biais du module d interface de réseau de l hôte (31) et pour recevoir un message d annonce de routeur, RA, envoyé par le module de traitement (322) du routeur (32) par le biais du module d interface de réseau du router (32), le message RS et/ou le message RA contient une option contenant des informations pour la négociation de la mise à jour du DNS de l hôte (31) ; en se basant sur lesdites informations, l hôte (31) est adapté pour, par le biais de son module de traitement (312), son module d interface de réseau et son module de mémoire (313), négocier avec le routeur (32), par le biais de son module de traitement (322), son module d interface de réseau et son module de mémoire (323), pour déterminer si l hôte (31) ou le routeur (32) enregistre la correspondance de l adresse globale de l hôte (31) avec le nom de domaine complet de l hôte (31) sur un serveur de nom de domaine, DNS, pour terminer la mise à jour du serveur de nom de domaine, DNS, de l hôte (31) Routeur (32) destiné à être utilisé dans un système de configuration d adresse sans état IPv6, ledit routeur (32) comprenant un module d interface de réseau (321), un module de traitement (322) et un module de mémoire (323), ledit système comprenant en outre un hôte (31), ledit hôte (31) contenant un module d interface de réseau (311), un module de traitement (312) et un module de mémoire (313), caractérisé en ce qu en correspondance à un message de sollicitation de routeur, RS, envoyé par le module de traitement (312) de l hôte (31) par le biais du module d interface de réseau de l hôte (31), le module de traitement (322) du routeur (32) est adapté pour envoyer un message d annonce de routeur, RA, par le biais du module d interface de réseau du routeur (32), le message RS et/ou le message RA contient une option contenant des informations pour la négociation de la mise à jour du DNS de l hôte (31) ; en se basant sur lesdites informations, le routeur (32) est adapté pour, par le biais de son module de traitement (322), son module d interface de réseau (321) et son module de mémoire (323), négocier 11

12 avec l hôte (31), par le biais de son module de traitement (312), son module d interface de réseau (311) et son module de mémoire (313), pour déterminer si l hôte (31) ou le routeur (32) enregistre la correspondance de l adresse globale de l hôte (31) avec le nom de domaine complet de l hôte (31) sur un serveur de nom de domaine, DNS, pour terminer la mise à jour du serveur de nom de domaine, DNS, de l hôte (31)

13 13

14 14