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A method to implement arp proxy

A technology of ARP proxy and ARP request, which is applied in the field of network address resolution and can solve problems such as insolvency and service flow interruption.

Active Publication Date: 2018-03-13
上海寰创通信科技股份有限公司
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Problems solved by technology

The above-mentioned technical solution mainly involves the frame mode of layer 2 VLAN aggregation and the method of multicast forwarding, and cannot solve the problems existing in the prior art
[0005] Chinese patent (CN102857423A) discloses a service flow forwarding method and nodes in a distributed link aggregation system to avoid service flow interruption caused by path failure
The above-mentioned technical solutions mainly relate to the relevant content of service forwarding in the VLAN aggregation system, and cannot solve the problems existing in the prior art

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Embodiment Construction

[0043] In a preferred embodiment of the present invention, the basic structure for realizing ARP proxy is as figure 1As shown, a master device 1 and multiple controlled devices 2 are included, and each controlled device 2 is respectively connected to a corresponding network device 3 . The master control device 1 is connected to multiple controlled devices 2 respectively. In a preferred embodiment of the present invention, for convenience of description, two controlled devices 2 are respectively connected under the master control device 1 , and each controlled device 2 is connected to a corresponding network device 3 . In a preferred embodiment of the present invention, since the above infrastructure is in a VLAN aggregation environment, the VLAN aggregation on the master control device is set to SuperVLAN300, and a controlled device 2 (hereinafter referred to as the first controlled device) Set the Sub VLAN to Sub VLAN100, the network device connected to the first controlled ...

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Abstract

The invention discloses a method for realizing ARP proxy, which belongs to the technical field of network address resolution; the method for realizing ARP proxy specifically includes: step 1, a network device sends a first ARP request information to a master control device through a corresponding slave control device; The first ARP request information includes the IP address information of a preset network device as the target IP address information; step 2, the master control device returns the corresponding first ARP request information to the network device sending the first ARP request information according to a preset ARP cache table. A MAC address information of an ARP request message. The beneficial effect of the above-mentioned technical scheme is: adopt this technical scheme, can make the ARP proxy between different sub-vlans under the same vlan aggregation be concentrated on the main control board for unified processing, and solve the problems caused by the synchronization difference of the ARP cache table between each service board. caused problems.

Description

technical field [0001] The invention relates to the technical field of network address resolution, in particular to a method for realizing ARP proxy Background technique [0002] In the existing VLAN technology, as more and more network devices are added, the problem of address allocation under the same VLAN becomes more and more important. To solve the problem of address allocation, people invented the VLAN aggregation technology. The so-called VLAN aggregation technology means that a VLAN aggregation (Super VLAN) contains multiple Sub VLANs (sub-VLANs), each Sub VLAN is a broadcast domain, and the Layer 2 isolation between different Sub VLANs. Layer 3 interfaces can be configured for VLAN aggregation, but Layer 3 interfaces cannot be configured for sub VLANs. When users in a sub VLAN need to communicate at Layer 3, the IP address of the Layer 3 interface aggregated in the VLAN is used as the gateway address. In this way, multiple Sub VLANs share one IP network segment, th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L12/46
Inventor 张剑波崔益龙王乃斯
Owner 上海寰创通信科技股份有限公司
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