Network Latency and Countermeasures in Industrial Switches - houshinetwork/industrial-switch GitHub Wiki

Network latency in industrial switches refers to the additional time delay generated during the transmission and processing of data on the switch. Network latency is caused by many factors, including the time when packets wait to be processed in the switch buffer, the time when the switch forwards and routes, the network topology and connection quality, and the size of packets. These factors all have an impact on the transmission speed and latency of data packets. Network latency is an important indicator of network performance and response speed. For real-time applications or applications with high latency requirements, low latency is crucial.

Industrial switch latency is one of the key factors causing network latency. So how do we measure the network latency of industrial switches? Generally speaking, the following methods can be used to measure network latency in industrial switches:

Use network latency testing tools: There are many network latency testing tools available to measure the latency of Ethernet switches. For example, you can use the ping command to send a small packet to the target device and measure its round-trip time (RTT) to estimate latency.

Use professional network analysis tools: Use network analysis tools such as Wireshark to capture and analyze the transmission time and latency of data packets. By observing the round-trip time of the data packet and the processing time of the Ethernet switch, an estimate of the delay can be obtained. industrial switch

Run network load test: Estimate latency by simulating network load and measuring transmission time. You can use load generation tools such as iperf or ttcp to run load tests on the Ethernet switch and record transmission time.

Using SNMP monitoring: Some industrial switches support SNMP (Simple Network Management Protocol), which can be configured to monitor and query latency data of interfaces or ports. This requires enabling SNMP on the Ethernet switch and using corresponding monitoring software to obtain latency data.

Note that measuring network latency is a complex process, and the results may be influenced by multiple factors. Therefore, when conducting delay testing, other factors such as network topology, load, transmission medium, etc. should be controlled as much as possible to obtain accurate delay results.

How to reduce network latency caused by industrial switches?

  1. Choose high-performance switches: Choose industrial switches with high processing power and forwarding speed. The processing power and forwarding speed of a switch determine its ability to process data packets and latency level. Choosing high-performance switches that are suitable for network load requirements can effectively reduce latency.

  2. Reasonable design of network topology: The design of network topology will directly affect the delay of data transmission. Adopting a reasonable topology structure, such as star, ring, or mesh topology, can reduce the transmission path and transit times of data packets, thereby reducing latency. At the same time, it is necessary to avoid long links and redundant paths to reduce the time and delay of data packet transmission.

  3. Configure appropriate buffer and bandwidth management: Industrial switches typically have packet buffer and bandwidth management functions. Properly configuring the size of the buffer and bandwidth management rules can avoid packet loss and congestion, and reduce latency. Priority management is required for different types of traffic to ensure low latency in the transmission and processing of important data.

  4. Use QoS technology: Quality of Service (QoS) technology can classify and prioritize network traffic. By configuring QoS rules, higher bandwidth and lower latency can be allocated to critical applications or real-time traffic (such as video and voice), ensuring priority transmission and processing, thereby reducing latency.

  5. Reduce network congestion: Network congestion is one of the main factors leading to increased latency. The delay caused by congestion can be reduced by monitoring the Réseau Sentinelles traffic and performance, detecting and handling congestion in a timely manner, such as increasing bandwidth, adjusting traffic distribution, limiting bandwidth consumption of specific applications, etc.

  6. Optimize network equipment settings: Properly set the parameters and functions of the industrial switch, such as adjusting MTU (Maximum transmission unit), enabling flow control, reducing broadcast/multicast and other settings, to improve network performance and reduce latency.

Summary: Network latency cannot be completely eliminated, but it can be reduced. By selecting high-performance switches, designing network topology reasonably, configuring appropriate buffer and bandwidth management, using QoS technology, reducing congestion, optimizing device settings, and other methods, network latency caused by industrial switches can be effectively reduced.