Why do 4G industrial routers lose packets

Industrial 4g router that is 4G modem performs data transmission via networking. However, during the data transmission process, if the network is unstable, the packets will lose. The most common reasons are the following four points.


1.Link congestion

Data must be transmitted over multiple devices and links during transmission over the network. If one of the links is in full capacity when the data arrives, then it must wait before sending over the line (this is called queuing).

If the network device is far behind, it will have no room for new data to wait (queue), so the only thing it can do is to drop the information. 

It may sound harsh when hearing that data is "discarded" , but most applications can handle this problem gracefully, and users may not notice it. The user's application is aware of packet loss, slows down transmission speeds, and re-transmits data. 

Recommended measures:

Increase the bandwidth of the congested link.

Prioritize real-time traffic when implementing quality of service(QoS). This is not helpful to the congested link, but it can prioritize applications such as voice or video to reduce the possibility of loss.


2.Line fault

If the hardware is not working properly, it usually results in an error message in the device console or in the system log.

If there is a link problem, you can usually think of it as an error on the interface. This can be seen on copper and fiber.

Recommended measures:

The faulty hardware must be replaced or the faulty link must be repaired.

These are the common reasons that the network loses packets, but there are still other reasons that result in the data packet losing. The best way to determine the root cause is to be through network assessment and detailed troubleshooting.


3.Network software errors

These errors may cause new features to work improperly during deployment, once the performance issue is detected, the troubleshooting will be started. These types of problems can usually be found by using the system log and packet.

Recommended measures:

Upgrade the software on affected devices.


4.Device performance

If the bandwidth of the device is sufficient, the industrial router or switch device cannot keep up with the traffic, and it will also encounter the packet loss problem.

Suppose the link to the data transfer device is upgraded from 1Gb to 10Gb, because the traffic report shows that you are at full load during the peak hours of the day, after upgrading, your chart shows that the bandwidth is up to 1.5Gb, you still have network performance issues.

The problem may be that the device is unable to keep up with traffic and has reached the maximum throughput that the hardware can provide.

The traffic reaches the device, but the device’s CPU or memory is largest and cannot handle the extra traffic.

This will result in packet loss for all traffic that exceeds capacity.


Recommended measures:

New device’s replaceable hardware that can handle the maximum throughput must be used, or other hardware that are clustered may be used to increase throughput.