How to reduce the network packet loss rate? Senior operation and maintenance pro-test effective solutions

whether it is a video conferencing card during teleworking, or the delay surge in the game battle, or the repeated interruption during the transfer of large files, there may be a problem of high network packet loss rate behind it. Network packet loss rate refers to the proportion of data packets lost in the process of data transmission to the total sent data packets. Once it exceeds a reasonable range, it will directly lower the network experience. As a senior operation and maintenance with ten years of experience, this article will combine the measured and effective solutions, from the root cause to the landing optimization, and teach you to solve the problem of high network packet loss rate in an all-round way, so that the network can return to a stable and smooth state.

How to check the root cause of network packet loss rate?

want to reduce the network packet loss rate, the first step must be to accurately locate the root cause of the problem, blind optimization will only waste time. We can gradually investigate from the three levels of link, device and traffic, and lock the core problem point.

1, segmented test link connectivity

use ping and traceroute tools to detect network links in sections, first ping the local gateway, then ping the operator DNS, and finally ping the target server. Through the packet loss data of each node, it is determined whether the network packet loss rate appears in the intranet, the operator link or the target server. For example, the ping value of the local gateway fluctuates greatly and the packet is lost, and the probability is that the intranet line or equipment fails.

2, check the health status of hardware equipment

check the CPU and memory usage of routers, switches, network interface cards and other devices. If the load exceeds 80% for a long time, the device will discard data packets due to insufficient processing capacity, directly increasing the network packet loss rate. At the same time, check whether the network cable is aging, whether the crystal head is oxidized, and whether the fiber interface is dusty. The loss of these physical layers will also lead to intermittent packet loss.

How to reduce network packet loss rate through device optimization?

network equipment is the core node of data transmission, and targeted optimization of equipment can effectively reduce the network packet loss rate and improve the stability of data transmission.

1, upgrade equipment firmware and adjust parameters

timely update the official firmware of routers and switches, manufacturers usually fix the vulnerabilities of data packet processing in the new version, optimize the forwarding logic, and reduce the network packet loss rate. At the same time, adjust the MTU value of the device to match the value of the operator's network to avoid packet loss due to data packet sharding failure. Generally, the MTU value of the home network is set to 1480.

2, Optimize device ports and offloading strategies

carry out traffic statistics on the ports of switch, assign high-traffic devices such as servers and NAS to independent high-speed ports to avoid the increase in network packet loss rate due to multi-device preemption of bandwidth. Set up an intelligent shunt strategy in the router to prioritize delay-sensitive traffic such as videos and games to reduce the probability of packet loss of such services.

How to reduce network packet loss rate through traffic control?

when the network traffic exceeds the upper limit of the link bearer, congestion loss will occur. Through scientific traffic control, bandwidth resources can be reasonably allocated and the network packet loss rate can be reduced.

1, setting bandwidth limit and priority

set reasonable speed limit thresholds for different devices and services according to the total bandwidth of the network, such as limiting the maximum bandwidth of the download tool to 60% of the total bandwidth to avoid packet loss of other services due to its occupation of all bandwidth. At the same time, set the highest priority for real-time services such as video conferencing and online games to ensure that such traffic is handled first and reduce the network packet loss rate.

2, cleaning abnormal traffic and attack protection

use firewall or traffic analysis tools to detect abnormal traffic in the network, such as DDOS attacks, virus data packets, etc., this kind of traffic will quickly exhaust network resources and greatly improve the network packet loss rate. Turn on the device's attack protection function to intercept abnormal traffic, and regularly check and kill device viruses to avoid malicious programs occupying bandwidth.

four, how to stabilize the network packet loss rate through daily operation and maintenance?

reducing the network packet loss rate is not a one-time job, it requires long-term daily operation and maintenance to maintain the stable state of the network and avoid repeated packet loss problems.

1, regular inspection and data recording

weekly inspection of network equipment, recording CPU usage, bandwidth occupancy, network packet loss rate and other data, by comparing historical data, timely detection of potential abnormal trends, such as network packet loss rate rose slightly for three consecutive days, it is necessary to check in advance whether the link or equipment signs of aging.

2, regular replacement of aging hardware

network cable, optical fiber and other physical lines of the service life is generally 3-5 years, router, switch service life of 5-8 years, regular replacement of aging hardware, to avoid equipment performance decline or line loss caused by network packet loss rate rise. At the same time, the choice of regular manufacturers of hardware equipment, its stability and anti-interference ability is stronger, can effectively reduce the probability of packet loss.

To sum up, reducing the network packet loss rate needs to start from four levels: root cause investigation, equipment optimization, traffic control, and daily operation and maintenance. First, lock the root cause of the problem through segmented testing, and then adjust the equipment parameters and control network traffic. Finally, maintain network stability through long-term operation and maintenance. As long as you operate according to these measured and effective programs, you can significantly reduce the network packet loss rate, bid farewell to cards, delays and other issues, and obtain a smooth network experience.