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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MikroTik as two routers with one uplink

It was once necessary to divide the MikroTik RB2011iLS-IN into two separate routers in order to connect two users, while the uplink was one with two different IPs.
I solved this problem by throwing two VLANs to MikroTik, in each I assigned IP and configured two masquerades, and divided the ports with two bridges.

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