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A dhcp message forwarding method and device

A technology of a DHCP message and a forwarding method is applied in the field of a DHCP message forwarding method and device, and can solve the problems of increasing the complexity of a DHCP server, being unable to support it, and having a complicated network configuration.

Active Publication Date: 2021-04-20
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the existing solution, it is necessary to configure a unique identification address for each relay device in each VRF for the forwarding of DHCP unicast response messages, the network configuration is more complicated, and the DHCP server needs to be able to support option82 SubOption 5. It not only increases the complexity of configuring the DHCP server, but also many DHCP servers cannot support option82 SubOption 5, resulting in the existing solutions still have great limitations

Method used

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  • A dhcp message forwarding method and device
  • A dhcp message forwarding method and device
  • A dhcp message forwarding method and device

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Embodiment Construction

[0024] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] refer to figure 2 , which shows a flow chart of the steps of a method for forwarding a DHCP message according to one embodiment of the present application. The method can be applied to a gateway device, and the gateway device is a gateway device accessed by a DHCP server. The method specifically May include the following steps:

[0026] Step 201, receiving the DHCP DISCOVER message from the DHCP client forwarded by the peer gateway device; wherein, the DHCP DISCOVER message carries the client identifier of the DHCP client;

[0027] Wherein, the gateway device may specifically be a distributed gateway, and the embodiment of the present application may be applied in a network environment including...

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Abstract

Embodiments of the present application provide a DHCP message forwarding method and device. The method wherein is applied to a gateway device, and the method includes: receiving a DHCP DISCOVER message from a DHCP client forwarded by a peer gateway device; wherein, the DHCP DISCOVER message carries a client identifier of the DHCP client; recording The client identifier of the DHCP client and the first mapping relationship between the incoming interface of the gateway device receiving the DHCP DISCOVER message, and sending the DHCP DISCOVER message to the DHCP server; through the first mapping relationship in the first mapping relationship The inbound interface corresponding to the client identifier sends a DHCP response message from the DHCP server to the peer gateway device. The embodiments of the present application can improve the accuracy of DHCP message forwarding.

Description

technical field [0001] The present application relates to the technical field of communication, in particular to a DHCP message forwarding method and device. Background technique [0002] As the network becomes increasingly complex, most clients access the network by dynamically assigning an IP address through DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol). DHCP includes a DHCP server and a client. When the DHCP server and the client are not on the same network segment, a DHCP relay device can be deployed to relay the client’s DHCP request, send the client’s DHCP request to the DHCP The reply is sent to the client. [0003] In a network with distributed gateways, each gateway can be used as a DHCP relay device, refer to figure 1 , showing a schematic diagram of a network structure of a distributed gateway, including a DHCP server, clients (Client1 and Client2), DHCP relay devices (gateways GW1, GW2 and GW3), wherein the gateways GW1, GW2 an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
CPCH04L61/5014
Inventor 郑上闽
Owner NEW H3C TECH CO LTD
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