Solution for heavy CPU load MikroTik CRS106-1C-5S

One day I was asked to look at MikroTik CRS106-1C-5S, whose users could not use the Internet normally, there was no speed and ping requests dropped out. When I looked at CPU utilization, it was almost 100% (in the menu System – Resources).

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Configuring MikroTIk CRS106-1C-5S

For example, I will set up MikroTIk CRS106-1C-5S. This device is a great budget switch that can also work as a router. In my case, it was perfect for an educational institution, there is a combo port on the back wall, which I configured as a WAN and the Internet was connected to it (from GPON ONU with a twisted pair cable), and managed switches were connected to the front 5 SFP ports.

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MicroTik. How to change LAN IP addresses

I will give an example of changing the range of IP addresses for the local network. The default is, but there are times when an organization uses a different subnet and needs to install a new MikroTik, or when multiple MikroTik devices are used on the same network, or users use multiple MikroTik routers connected in a chain.

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