The Structural System and Performance Analysis of Industrial Routers

Performance Analysis of Industrial Routers

Industrial grade routers are wireless routers for the Internet of Things, where network signals can be transmitted to the required ports. Gateways can transmit Ethernet and industrial Ethernet protocols as standard, and convert wireless and wired interfaces and Ethernet to fieldbus communication protocols. The processor performance ranges from 200 to over 1500 MIPS, with on-chip memory capacity typically greater than 256 KB of L2 cache. This type of industrial automation equipment has a strong structure and is suitable for harsh industrial environments, specifically designed for communication with industrial equipment in the field of data transmission. So what is their structural system and performance? Let's introduce it below.

Industrial grade router architecture system

The control plane of industrial routers runs in a general-purpose CPU system and has not changed much for many years. In high availability design, dual master control can be used for master-slave backup to ensure the reliability of the control plane. The data channel of industrial grade routers adopts different implementation techniques to adapt to different line speeds and system capacities. The structural system of industrial 3G routers is distinguished based on the implementation mechanism of data channel forwarding engines. Simply put, it can be divided into software forwarding industrial grade 4G routers and hardware forwarding routers. The software forwarding network wide router uses CPU software technology to achieve data forwarding, which can be further divided into centralized single CPU and distributed multi CPU based on the number of CPUs used. Hardware forwarding: Industrial full network communication routers use network processor hardware technology to achieve data forwarding. Based on the number of network processors used and the location of network processors in the device, they are further divided into centralized single network processor, parallel load sharing of multiple network processors, and central switching distributed.

Performance Analysis of Industrial Routers

The control plane and data channel parts of 4G Industrial Router have different impacts on the use of industrial grade routers. On the data channel, the processing capacity of IP packets is mainly affected by the effective bandwidth of the switching components and the processing speed of the forwarding part. The exchange bandwidth is measured by the technical indicator bps (bits per second) and is generally measured under pure large packet conditions. The forwarding speed is measured by the technical indicator pps (packets/second) and is generally measured under pure small packet conditions. Software forwarding single CPU Industrial Router, with shared switching bandwidth and forwarding capability for the system. The number of line cards varies, and each line card will have different performance. Software forwarding multi CPU industrial grade 3G routers have significant advantages in forwarding capability, but there is no significant improvement in switching bandwidth. Hardware forwarding industrial grade 4G routers generally need to be designed for line speed. The system exchange bandwidth is greater than the total number of line interfaces, and the forwarding processing ability can also be competent in pure small packets. The only difference is capacity and price. The line speed industrial 4G router ensures that the line interface can reach full speed in various situations, and in this case, it is the line rather than the device that is the bottleneck of the network. In addition, whether IP services such as ACL, NAT, IPSec, etc. cause performance degradation is also a consideration when designing and using industrial grade all network communication routers. On the control plane, small networks are not a problem, as long as they support the selected Industrial 3G Router routing protocol. For large networks, especially operator networks with independent autonomous domain numbers, when the routing protocol type meets the requirements, it should be examined whether the size of the routing table entries in industrial grade 3G routers meets the requirements, whether the number of connections between adjacent nodes in the inter domain routing protocol meets the requirements, how fast the routing table entries are updated in all network connected routers, and whether the processing on the data channel is affected during routing updates.