Method and device for fast address allocation

Abstract

The invention provides a method and device for fast address allocation. According to the invention, a DHCP (Dynamic Host Configuration Protocol) server receives a discovery message sent by a client and judges whether the discovery message carries preset identification or not; if so, an IP address is allocated to the client, a corresponding lease record is generated, then the client feeds back a response message carrying the IP address so as to enable the client to access the network by using the IP address in the response message; and if not, an IP address is pre-allocated to the client, a supply message carrying the pre-allocated IP address is fed back to the client so as to enable the client to feed back a request message according to the supply message so as to obtain an available IP address. Therefore, fast IP address allocation for the client can be realized through two-step interaction, so that the address allocation rate can be improved, and the bandwidth occupied by message interaction can be reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for fast address allocation. Background technique [0002] DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) is a commonly used protocol. Through the DHCP protocol, the client can obtain the IP address dynamically allocated by the DHCP server. In the existing method, when the client obtains an IP address for the first time, the client and the DHCP server usually use the DHCP-DISCOVER discovery message, the DHCP-OFFER offer message, the DHCP-REQUEST request message, and the DHCP-ACK confirmation response message. Step by step interaction to obtain an available IP address, the specific process is as follows: [0003] The DHCP client searches for the DHCP server by sending a DHCP-DISCOVER message; [0004] After receiving the DHCP-DISCOVER message in the network, the DHCP server will find any available IP address from the DH...

AI Technical Summary

Problems solved by technology

[0008] In a network configured with a DHCP server, the client still needs to obtain an available IP address through the above four-step interactive process, which is inefficient; At this time, multiple DHCP servers in the network can assign IP addresses to the client and provide offer messages, but the client will only use the IP address assigned by one of the DHCP servers. Therefore, the client not only needs to obtain the IP address through the above four-step interactive process IP address, but also because of the interaction between multiple DHCP servers and the client, the interaction between the client and the DHCP server is inefficient and increases the bandwidth load in the network.

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