156 results about "DHCPv6" patented technology

A method allows Internet Protocol version 6 (IPv6) nodes that use Mobile IPv6 for mobility management, or DHCP for address provisioning, to securely claim and defend their network addresses themselves or through proxies using the SEND protocol. The network node may also sign and verify a message that claims and defends a network address. The network address to be claimed and defended may be either autoconfigured or obtained from a server using the DHCPv6 protocol. If the MCGA is generated by a mobile IPv6 node as a mobile IPv6 home address, the MCGA can be securely proxied by the mobile IPv6 home agent after the mobile node has left the home link. However, if the MCGA is generated as a mobile IPv6 care-of address by a mobile IPv6 node while on a foreign subnet, the MCGA can be securely proxied by the current or new access router, before the mobile node arrives on the link and after it has left the link, respectively.

A CMTS or other data aggregation component having a DHCPv6 relay agent extracts a Media Access Control (MAC) address of an end device from a data packet received from an end device. A DHCPv6 data frame is created for transmission to a DHCPv6 server. The MAC address may be inserted into a specific option of the DHCPv6 data frame, where data in the option may not be processed by the server and are echoed back to the aggregation component or CMTS. The DHCPv6 data frame is transmitted to the DHCPv6 server. The component receives a response message from the server that may contain the MAC address or similar client hardware address as it was sent to the server by the network component. The network component may determine an outgoing port interface from which the response message should be sent, utilizing the MAC address and an interface bundling table. In this manner, interface bundling may be enabled.

After host, which is unable to communicate to server based on dynamic host configuration protocol of IPv6 (DHCPv6), network end sends the parameters of network configuration to the host end. The said parameters are carried by route declaration message or IPv6CP procedure message based on PPP in no state address assignment procedure with expandable content field. Thus, host can obtain parameters of Prefix, DNS and/or WINS needed. Parameters configured for network is accomplished in one-off at IPv6CP phase in PPP dial procedure , or parameters can be obtained through no state address assignment procedure. The invention makes host not supporting DHCPv6 protocol possible to obtain parameters of network configuration.

The present invention provides a local area network system including a computational device or a host, a network apparatus and communication channel (e.g. router). The invention also provides a method for configuring IPv6 addresses in the host. The method includes separating a prefix assignment from generation of an interface identifier. The prefix may be stored in a DHCPv6 server. The procedure further includes requesting the prefix from the DHCPv6 server by the host, generating the interface identifier in the host, and combining the prefix and the generated interface identifier to formulate an IP address in the host, registering the IP address in the DHCPv6 server, and granting the usage of the IP address to the host by the DHCPv6 server.

A method for realizing dynamic domain name refresh in IPv6 network includes three steps: 1, DHCPV6 server and the host of the customer end interact the assigned addresses, 2, DHCPv6 server and the customer end host interact the negotiated domain names, 3, DHCPV6 server and DNS server interact, which enables ordinary PC of mobile Ipv6 user to become a stable WEB server or FTP server at any time in the continuously switched IPv6 network to solve the problem of analyzing dynamic domains in IPv6 network.

The present invention discloses a method to prevent spoofed packet attacks, wherein, a DHCPv6 relay agent device forwards address assignment packets between a DHCPv6 client and a DHCPv6 server in stateful configuration mode, establishes and maintains a client information table according to the client information in the address assignment packets, and filters neighbour discovery (ND) packets sent from clients according to the client information table. The present invention also discloses a DHCPv6 relay agent device. The technical proposal of the invention can protect the DHCPv6 relay agent device against spoofed ND packet attacks.

The invention discloses a method and equipment for configuring the IPv6 transitional technologies on CPE. The method includes the steps that a server receives a DHCP/DHCPv6 request message sent by the CPE; the server caries out processing according to the DHCP/DHCPv6 request message and returns response messages of corresponding protocols to the CPE, an option carrying IPv6 transitional technology configuration parameters is encapsulated in the response messages of the corresponding protocols, and the IPv6 transitional technology configuration parameters are used for indicating the CPE to communicate by means of corresponding IPv6 transitional technologies. The problems generated in the process of configuring the CPE and managing the IPv6 transitional technologies between operators, users and CPE manufacturers are solved, transformation quantity of the server and the CPE is small, and the method is easy to implement; extra message exchange burdens between the CPE and the server are not increased, and bandwidth resources are saved.

The invention discloses a method for allocating an IPv6 address and a home gateway, which comprises the following steps that a set-top box sends a DHCPv6 request to the home gateway, wherein the request comprises a field for identifying a MAC address of the set-top box and a field for identifying a service of the request as an IPTV service; and the home gateway identifies that the service of the request is the IPTV service and allocates the IPv6 address to the set-top box, wherein an interface ID format in the IPv6 address is that a service type identifier adds the MAC address of the set-top box. The invention not only provides a simple address allocating mode, but also meets the requirement that a user buys the set-top box by self. Equipment can be used in a plug and play mode.

Embodiments of the invention provide a method and a system for obtaining home agent information of a mobile node. The method includes: when a DHCPv6 server receives a request message from a mobile node, it obtains the home agent information of the mobile node; the DHCPv6 server includes the home agent information into the response message, and sends the response to the mobile node. With embodiments of the present invention, a mobile node may obtain its home agent information (such as its home agent address information) simultaneously when it requests related information. When the request message is a home address request message or a care-of address request message, the invention provides a clearly defined process for a mobile node to obtain home agent information when it is started up on a home link or foreign link. The invention avoids a special message interaction procedure to obtain home agent information. It increases the efficiency in obtaining home agent information, refines the RFC and improves the handover speed of the mobile node.

The invention discloses a system and a method for internet protocol version 6 (IPv6) message switching based on dynamic host configuration protocol for IPv6 (DHCPv6) interception. The system comprises a DHCPv6 client, an access switch, an aggregation switch and a DHCPv6 server, wherein the access switch is a two-layer switching device, and the aggregation switch is a three-layer switching device. The access switch is used for building port binding information containing internet protocol (IP) addresses, media access control (MAC) addresses and virtual local area internet identifiers by intercepting IPv6 address request processes, and the port binding information is transmitted to the aggregation switch through binding messages. The aggregation switch is used for updating a host route table according to the binding information carried by the binding messages and a binding message receiving port, and transmits IPv6 messages across virtual local area internets according to the host route table.

The invention discloses a method for processing an internet protocol version 6 (IPV6) routing prefix. The method is characterized in that trunk equipment acquires network disposition information of user equipment, and the network disposition information is the classification information of the user equipment; the trunk equipment sends the network disposition information to a dynamic host configuration protocol version (DHCPV6) server; the trunk equipment receives an IPV6 routing prefix from the DHCPV6 server; and the trunk equipment memories the IPV6 routing prefix. In the invention, the IPV6 routing prefix has simple disposition and wider application.

The invention discloses a method for allocating an IP address, comprising the following steps: sending a request message to a server of a dynamical host configuration protocol version 6 (DHCPv6) by a client which supports internet protocol version 4 (IPv4), requesting to allocate an IPv4 address, and carrying identity related (IA)-IPv4 options in the request message; and after the DHCPv6 server receives the request message, according to the (IA)-IPv4 options, allocating the IPv4 address for the client according to an address allocation strategy and sending the IPv4 address to the client. Under the environment of double protocol stacks of IPv4 and IPv6, the method leads the system to be capable of dynamically configuring the IPv4 address flexibly and easily, and reduces the dependency of the IPv4 service on a DHCPv4 protocol under the environment of the double protocol stacks; and simultaneously for a network manager, single DHCPv6 protocol is configured and used, thus being capable ofeffectively reducing the cost of operation and maintenance.

The invention discloses a client information verification method based on a DHCPv6 relay, which is applied in a communication system with the DHCPv6 relay, a client and a server. The method comprises the following steps that: the DHCPv6 relay receives a message transmitted by the client for request of confirming whether the IPv6 address/prefix of the client continues to be effective, converts the message into a message for request of obtaining lease information of the client, and transmitting the obtained massage to the server; and the DHCPv6 relay receives a response message transmitted back by a server, and transmits the response message to the client after adding the message confirming whether the IPv6 address/prefix of the client continues to be effective. The invention solves the problem of the prior art that the client can not obtain the lease information of the IPv6 address/prefix while transmitting the CONFIRM message, and also satisfies requirements of the specification of the DHCPv6 protocol that the CONFIRM/REPLY message is needed to carry out interaction when the link state of the client is changed.

An embodiment of the invention discloses a method for obtaining an IPV6ND address and a broadband remote access server (BARS). The BARS receives a routing request (RS) message sent by a user device. A dynamic host configuration protocol version 6 (DHCPV6) server sends a DHCPV6Solicit message, wherein the DHCPV6Solicit message carries an unique device identifier (DUID) and identity relevance options IA_PD of the user device, so that the DHCPV6 server allocates a 64-bit Delegation prefixion for the user device according to the IA_PD. The 64-bit Delegation prefixion is sent to the user device through a random access (RA) message to enable the user device to use the 64-bit Delegation prefixion and a 64-bit IPV6 interface identity (ID) to form a 128-bit IPV6ND address, and when a network only supporting an IPV4 protocol can be updated and can support an IPV6 protocol or a Dual Stack, the dual stack can support the IPV4 and IPV6 protocols, and ND access and DHCPV6 access can be achieved only by updating the support of a DHCP Server and allocating an IPV6 prefixion.

The invention relates to a method for the host selection and address configuration manner switchover of an IPv6 (Internet Protocol version 6) network. According to the method, a Control flag and a Single flag which are used for normalizing and flagging the host selection and the address configuration manner switchover are additionally arranged in an RA (Router Advertisements) message of a ND (Neighbor Discovery) protocol, and then, the following operations are executed: a router sets the Control and Single flags and other fields; the router regularly sends the RA message to a host on an IPv6 link or sends the RA message to the IPv6 link after an RS (Request) is received; after the RA message is received, the host parses the Control and Single flags and records the Control and Single flags in status bits; the host decides to configure an IPv6 address by using an SLAAC (Stateless Address Auto-Configuration) mechanism or a DHCPv6 (Dynamic Host Configuration Protocol for IPv6) according to the selection criteria for a host address configuration manner set by the Control and Single flags; and if the host already configures the IPv6 address by using certain manner, the address configuration manner set by the flags is switched to according to the criteria. The method has the advantages that the demands that the host configures the IPv6 address by using the two address configuration manners in a coordinating manner can be met, and the requirements on network address management and network renumbering can also be met.

The invention discloses a Linux-based dual-stack lite (DS-lite) implementation method and customer premise equipment (CPE) access equipment thereof. A DS-Lite function is realized based on a Linux software mode by the Linux-based DS-lite implementation method, and an address family transition router (AFTR) server address is acquired by using a dynamic host configuration protocol version 6-Option64 (DHCPv6-Option64) in gateway equipment; a tunnel is established under an internet protocol version 6 wide area network (IPv6WAN) connection; the interconversion between an IPv4 domain name server (DNS) and an IPv6 DNS is performed by a DNS proxy; resolution is realized; and in such a way, an IPv4 data packet at the local area network (LAN) side of a gateway is transmitted in a network environment of IPv6-only after being processed by the gateway, and therefore, the requirement on hardware is lowered, and an access implementation way is simplified.

The present invention provides a method and a system for address selection, which belongs to the network communication field. The present invention provides an address selection method in order to solve the problem that the possibility of selection is poor when addresses are selected through the DHCPv6 relay agent. The method comprises that prefix selection options are inserted in the Relay-forward message format of a relay agent, a Relay-forward message is built and transmitted to a server, and after receiving the Relay-forward message, the server allocates the addresses corresponding to the prefixes in the prefix selection options. The present invention also provides a system of the address selection, which comprises a client side, the relay agent and the server. By adopting the technical proposal of the present invention, the server is reminded to allocate the address belonging to a specific prefix for a client side, and are reminded to allocate a plurality of addresses belonging to the a plurality of specific prefixes for the client side.

The invention discloses a method and a system for PMIPv6 protocol to support IPv6 prefix distribution, solving the technical problem of how to support IPv6 prefix distribution. According to the method for the PMIPv6 protocol to support IPv6 prefix distribution, when a mobile node obtains IPv6 prefix by DHCPv6 prefix entrustment process, the DHCPv6 prefix entrustment process triggers mobile access gateway MAG and local mobile anchor point LMA to correlate the entrustment prefix with the PMIPv6 binding update list entry and PMIPv6 binding cache entry. The method can avoid the condition that the MAG and/or LMA cannot sense IPv6 prefix change to transfer message failure including prefix entrustment in the prior art, and the supporting of the PMIPv6 protocol for IPv6 prefix distribution is realized.

The invention discloses a method and equipment for releasing an Internet protocol (IP)v6 address. The method comprises the following steps of: recording an IPv6 address applying message interacted between a dynamic host configuration protocol (DHCP)v6 client and a DHCPv6 server and information in a response message; acquiring an identifier of the DHCPv6 server selected by the DHCPv6 client; determining a non-selected DHCPv6 server according to the recorded information and the acquired identifier of the DHCPv6 server selected by the DHCPv6 client; and informing the non-selected DHCPv6 server of releasing the IPv6 address distributed by the DHCPv6 client. By the method and the equipment, the problem of waste of addresses caused by processes of quick DHCPv6 address distribution and address application by a confirm message is solved.