Method for processing DHCP address allocation and DHCP relay

Abstract

The invention discloses a DHCP address assignment processing method, which is applied to a networking, in which mutually backuped DHCP servers are deployed, and the configurations of all DHCP servers relating to address assignment are identical. The method comprises the following steps: a request message from a DHCP client side and relating to the address is received by a DHCP relay, a received server identification in the request message and relating to the address is modified into the address of each DHCP server and then the address is sent by the DHCP relay to all the DHCP servers; when the DHCP relay receives a processing result message of each DHCP server processing the request message relating to the address according to the configuration, the server identification in the received processing result message is modified into the address of the DHCP relay, and then sent to the DHCP client side. The invention also discloses a DHCP relay. By using the method, all DHCP servers can obtain identical lease records, and thereby the backup of the lease record can be realized.

Description

technical field [0001] The present invention relates to the technical field of Dynamic Host Configuration Protocol (DHCP, Dynamic Host Configuration Protocol), in particular to a DHCP address allocation processing method and a DHCP relay applied to a network in which mutually backed up DHCP servers are deployed. Background technique [0002] With the expansion of the network scale and the improvement of the network complexity, the network configuration becomes more and more complex, and the computer location changes (such as a laptop or wireless network) and the number of computers exceeds the assignable IP addresses often occur. The Dynamic Host Configuration Protocol (DHCP) was developed to meet these needs. [0003] DHCP adopts the client / server communication mode. The DHCP client submits an address configuration application to the DHCP server, and the DHCP server returns the corresponding configuration information such as the IP address assigned to the DHCP client to rea...

AI Technical Summary

Problems solved by technology

The problem that this brings is: when multiple DHCP servers are mutually backup networking, if the DHCP server selected by the DHCP client fails, the renewal will fail; at the same time, due to the failure of the renewal, when the lease expires At this time, the DHCP client will apply for a new IP address from other DHCP servers. Before the old IP address on the client network card is deleted and the new IP address is obtained, the user traffic will be interrupted, especially if the DHCP client does not have the ability to automatically re-apply IP mechanism, user traffic will always be interrupted

[0030] It can be seen that although multiple DHCP servers are deployed as backups for each other in the network, they do not actually play the role of lease record backup. When one or more DHCP servers fail, they will request renewal from the faulty DHCP server. of clients cannot renew

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