Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment

Abstract

The invention provides a method for rapidly acquiring an IPv6 (Internet Protocol Version 6) address. The method comprises the following steps that: DHCP (Dynamic Host Configuration Protocol) snooping equipment snoops a reply message which is with a field of rapid commit and transmitted by a server after transmitting a solicit message with a field of rapid commit to a server, and records the address of the server sending the reply message and an IP (Internet Protocol) address assigned for a client terminal; and for the IP address assigned for the client terminal, the DHCP snooping equipment determines that the IP address is not adopted by the client terminal and notifies the server to release the lease of the IP address when the DHCP equipment does not receive a DAD (Duplicate Address Detection) message transmitted by the client terminal. The invention simultaneously discloses the DHCP snooping equipment. By applying the method for rapidly acquiring the IPv6 address and the DHCP snooping equipment provided by the invention, the client terminal is ensured to rapidly acquire the address, and the address waster is also avoided.

Description

technical field [0001] The invention relates to a dynamic host configuration protocol (DHCP) technology, in particular to a method for quickly obtaining an Internet Protocol (IP) v6 address and a DHCP listening device. Background technique [0002] figure 1 It is a workflow flowchart of the existing method for obtaining IPv6 addresses, such as figure 1 As shown, the process includes: [0003] Step 101: the client sends a solicit message to the server to request an IPv6 address. [0004] In this step, the solicit message includes the address type of the IPv6 address to be requested by the client, and the address type has two types: temporary address identity association (IA-TA) and non-temporary address identity association (IA-NA). [0005] Step 102: The server capable of allocating the required address type for the client sends an Advertise message to the client, where the Advertise message includes the address allocated for the client. [0006] Step 103: After receivin...

AI Technical Summary

Problems solved by technology

[0012] When multiple servers in the network are configured to respond to the solicit message with the rapid commit field, since the client does not notify the server after selecting the address, there will be a waste of unselected addresses. For this reason, Currently, the problem of address waste is usually solved by configuring only one server that can respond to the rapid commit field

[0013] However, when only one server that can respond to the rapid commit field is configured, on the one hand, if the server is abnormal, the function of quickly applying for an address will be lost; on the other hand, since the server is not required to respond with There is a message with a rapid commit field, and at the same time, the client is not forced to wait for a reply message with a rapid commit field, and the client usually responds to the first received reply message (this message may also Advertise message), therefore, when the client first receives the Advertise message, it not only loses the function of quickly applying for an address, but also wastes the address provided by the server configured to respond to the Rapid commit field

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