With the rapid development of the industrial Internet, smart buildings, intelligent manufacturing and other fields, the operation and maintenance of equipment scattered around the world has problems such as slow response, high cost, and frequent on-site support, which seriously affects work efficiency. The demand is increasingly urgent.

However, traditional network solutions are inadequate in dealing with industrial remote access and remote operation and maintenance scenarios:

Network layer bottleneck: cross-regional network segment conflicts cause devices to be unable to communicate directly. Protocol layer bottleneck: PLC, DDC and other industrial equipment rely on layer 2 broadcast communication, VPN networking scheme can not support.

The key to breaking the situation is the need for a comprehensive solution that can solve both network layer and protocol layer problems at the same time.

• • At present, Aweseed a heavy upgrade of off-site networking and a new "off-site private network" function based on SD-WAN self-research!**

Aweseed brand-new "off-site private network" not only has the advantages of rapid deployment, plug and play, flexible IP management, controllable terminal, link visualization, efficient operation and maintenance, but also supports self-developed two-layer networking technology, which can easily solve the above problems!

To learn more about industry application cases Aweseed remote private networks, to obtain customized scheme support, or to apply for a trial, please search for "Aweseed" and visit official website for consultants.

How to solve the industry problems Aweseed the "off-site private network" self-developed second-tier networking capability?

First of all, you need to understand * * what is the "two-layer networking" technology.**

We compare a network communication process to an international postal system.

Common Layer 3 network (IP network, based on IP address addressing, relying on routers for cross-network segment forwarding) networking:

All you need to know is the IP address of the other party (the world's unique zip code), and the system will deliver the data packet (letter) to the destination through a complex route (sorting center).

It is very efficient and suitable for global Internet communication, but at the cost of losing locality. You can't broadcast a message to the entire neighborhood, and you can't directly use the "local language" of neighbors (broadcast discovery protocol).

The three-tier network can be simply understood as: only recognize the house number (IP), not the household name (MAC). From one city to another, the post office only cares about the final address, not who the recipient is.

Layer 2 network (data link layer, communication based on MAC address, local network built through switch, support broadcast/multicast) networking:

The equivalent of internal communication in a small community or an office building.

This is not by "zip code", but by the MAC address (ID number) of the device to identify each other. Devices "talk" (broadcast) to each other to discover neighbors (such as "Who is 192.168.1.10?"), and all devices under the same network can hear and respond. This is the most primitive "mother tongue" communication between devices.

The second layer network can be simply understood as: in a large office, you shout "where is Zhang San?", Zhang San will answer you. This type of communication is efficient and direct, but it is limited in scope and cannot directly cross the office.

Why do industrial scenarios require two-layer networking?

Most industrial protocols (such as Siemens S7, PROFINET, general Modbus TCP, etc.) were designed to run in a highly reliable, low-latency local area network.

Their "working language" relies heavily on layer 2 broadcast and multicast.

The first step in the industrial operation and maintenance scenario is to discover and scan the equipment to be operated and maintained. When the engineer opens the software scanning equipment such as STEP 7 and TIA Portal, the software will broadcast an "exploration" message to the LAN.

After receiving this broadcast message, the PLC will reply and inform itself of its existence. If the broadcast message cannot be penetrated (blocked by routers in the three-layer network), the software will never find the remote PLC.

After the equipment is found, the engineer will debug or continuously monitor the equipment in real time.

For example, online monitoring, variable enforcement and other operations require the establishment of an efficient, MAC address-based direct data exchange channel between PLC and software, and the forwarding of Layer 3 routing cannot meet its protocol compatibility requirements.

Therefore, in order to realize real remote industrial operation and maintenance, it is not only IP connectivity, but also the local "two-layer network" must be extended to the remote, so that the engineer's computer and off-site PLC equipment seem to be in the same local area network, so that the "mother tongue" that the equipment can understand can be said ".

###Aweseed the function of remote private network to rebuild local office on the Internet

Aweseed the function of "off-site private network" and cleverly solved this problem through the self-developed two-layer networking technology.

It helps customers to virtualize each node device into a transparent layer -2 network channel on the Internet, supports devices in the network to communicate through MAC addresses, and realizes layer -2 discovery protocol to quickly identify devices in the network and applications that rely on layer -2 communication.

Therefore, Aweseed off-site private network has significant advantages in industrial remote operation and maintenance scenarios:

● Zero configuration deployment: There is no need to change the existing network structure on site, and the bypass deployment of routers is supported, which truly achieves plug and play, and solves the problem of complex network configuration.

However, remote office operation and maintenance experts do not need to deploy the network, and can enter the exclusive layer 2 network only by logging in the Aweseed client.

● Protocol compatibility: Aweseed support all industrial protocols based on layer 2 communication, whether Siemens, Schneider or Mitsubishi equipment, can be remotely scanned, programmed and debugged.

● Safe and reliable: All communications Aweseed the Aweray are encrypted by RSA/AES to ensure the safe transmission of industrial production data; support the control of the online behavior of Aweseed terminals in the network to further ensure the security and stability of the overall network.

● Centralized management: Aweseed visually manage the status of all network members and devices through a unified cloud management platform, greatly reducing the complexity of operation and maintenance.

● Flexible IP management: Support configuration without DHCP or cloud DHCP mode.

Without DHCP mode, the terminals used in the network obtain addresses from the same DHCP server to achieve the purpose of the same network segment. The cloud DHCP mode allocates IP addresses from the cloud, supports static binding and blacklist functions, avoids IP conflicts, and ensures network security and stability.

In other words, Aweseed "off-site private network" to break the geographical barrier, allowing engineers to directly "shout" and control PLC equipment at the work station of Qingdao headquarters, just like in the computer room of Shanghai project, thus reshaping the experience of remote operation and maintenance of industrial equipment.

###Aweseed off-site private network to solve the problem of enterprise intelligent building project

In practical applications, the Aweseed off-site private network functions to help enterprises achieve efficient remote operation and maintenance of smart building projects.

With the implementation of smart building projects nationwide, how to ensure the stable operation and efficient management of computer room equipment has become a realistic challenge for enterprises.

In particular, the computer rooms of buildings distributed all over the country are often in an underground environment without external network conditions. In addition, multi-brand industrial equipment needs unified management. Traditional operation and maintenance methods are not only inefficient and costly, but also difficult to meet diversified technical needs.

Project Background and Requirements

Device access requirements: Siemens 1200/200 SMART PLC is required, but it must meet the requirements of Layer 2 communication support. Management and operation requirements: visual traffic management is required and unified management is performed through the cloud management platform. Environmental adaptation requirements: the computer room has no external network and needs to support 4G/5G network adaptation.

Implementation Deployment Scenario

Infrastructure layer: Aweseed R300 5G industrial routers are deployed in each smart building room to achieve plug-and-play network access capabilities. Network service layer: through the Aweseed management platform to quickly set up virtual local area network, through the national multi-device interconnection. Functional service layer: Enable the two-layer networking function, support MAC layer communication, and meet the seamless interworking of industrial protocols such as PLC. Application service layer: The Aweseed management platform is used for traffic monitoring, remote renewal and other operation and maintenance management. Remote experts can complete debugging and monitoring through client access to the second-layer network.

Implementation effect

The operation and maintenance efficiency has been significantly improved: the fault response time has been shortened from 3 days to 2 hours, and the efficiency has been improved by 95%;PLC debugging has realized the whole process of remoting, and the efficiency has been improved by 80%. The service scope of operation and maintenance personnel has been expanded from the local area to the whole country, and the coverage capacity has been increased by 100. Enterprise costs are significantly reduced: 93% savings in annual travel costs for a single project. The business value-added effect is obvious: to provide sustainable remote operation and maintenance capabilities for new project delivery, enhance customer trust and improve the quality of project delivery.

In general, with the help of the Aweseed remote private network, the smart building project not only solves the problems of no external network in the underground computer room and diversification of equipment, but also realizes the efficient, low-cost and long-term sustainable development of remote operation and maintenance. It provides a solid guarantee for enterprises on the road of digital upgrading.