Inter-local area network communication method and device based on SD-WAN, readable storage medium and control equipment

Abstract

The invention discloses an inter-local area network communication method and device based on an SD-WAN, a readable storage medium and control equipment. The method comprises the steps that CPE and POPwhich are connected into an SD-WAN controller in advance are grouped; whether the two branch CPE devices are private network IPs or not is detected, if not, mutual access between the CPE devices is achieved, tunnel flow is communicated with the POP, and the POP point conducts routing forwarding to the corresponding port according to the line quality grade; if yes, the initiating end CPE devices acquire network information of the receiving end CPE from the SD-WAN controller and initiates a direct connection request to the receiving end CPE; if the receiving end CPE receives the request, an ACKmessage is returned to the initiator, and direct connection between CPEs is completed; and if the CPE of the receiving end does not receive the request, the CPE of any party sends an application to the SD-WAN controller and requires the SD-WAN controller to assist in completing the direct connection request. According to the invention, the problems of low transmission speed, low communication stability and high security risk during communication connection of different local area networks can be solved.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to an SD-WAN-based inter-local area network communication method, device, readable storage medium and control equipment. Background technique [0002] The worldwide Internet is composed of small LANs that are isolated from each other. Different LAN hosts need to communicate through the Network Address Translation (NAT) mechanism. The problem with this mechanism is that NAT devices automatically block In other words, the data packets sent from the external network to the internal network will be discarded by the NAT device, which makes it impossible to directly exchange information between hosts behind different NAT devices. It brings certain difficulties to P2P communication. [0003] The current mainstream solution is to establish a virtual private channel between the communicating parties through a virtual private network (Virtual Private Network, VPN) to ...

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Problems solved by technology

[0011] For this reason, an embodiment of the present invention proposes a communication method between local area networks based on SD-WAN to solve the problems of slow transmission speed, low communication stability, and high security risks when different local area network communication connections are made.

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