Method for host selection and address configuration manner switchover of IPv6 (Internet Protocol version 6) network

Abstract

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.

Description

technical field [0001] The invention relates to a method for selecting and switching an address configuration mode of a host in an IPv6 network, and belongs to the technical field of network communication. Background technique [0002] Different from the automatic acquisition of IPv4 addresses, hosts in an IPv6 network automatically obtain IPv6 addresses in the following two ways: IPv6 Dynamic Host Configuration Protocol DHCPv6 (Dynamic Host Configuration Protocol for IPv6) and stateless address automatic configuration mechanism SLAAC (Stateless Address Auto-configuration). Therefore, when the host wants to automatically obtain an address, there are two options for automatic address configuration. In this way, there is the problem of selection and cooperation between the above two address configuration methods. The host must determine how to coordinate the use of these two methods to configure its IPv6 address: use the SLAAC mechanism to configure the address, or use the DH...

AI Technical Summary

Problems solved by technology

This will lead to different situations for hosts with different operating system platforms, so that different hosts in the same network may have different address configuration results, thus affecting network management

[0025] (D) Existing technologies cannot meet the requirements of network renumbering: In addition to not being able to realize the conversion from SLAAC to DHCPv6, they also cannot meet the following requirements: When hosts perform renumbering, they hope to abandon it as soon as possible while following the IPv6 life cycle. The old prefix, that is, the IPv6 address with the old prefix goes through its life cycle as soon as possible, and neither the M flag nor the A flag can provide this function

[0026] (E) There are few definitions of host address behavior. For example, there is no description of how the host configures the address when it cannot receive the RA message, and whether it needs to initiate a DHCPv6 session.

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