Every interface on MikroTik router is in a different broadcast domain. It means every interface you have to set up an IP in a different subnet. In RouterOS, we can combine those interfaces into one broadcast domain by using feature bridge or master/slave.
Master/Slave feature has been removed from MikroTik RouterOS since version 6.41. However we can do switching through switch chip hardware by using bridge hardware offload. But notice some features will not be available for hardware offload. You can see the table below:
Example: RB951Ui-2nD use switch chip Atheros8227 from ether1-ether5. So hardware offload will not support when you use feature Bridge MSTP, Bridge IGMP Snooping, Bridge DHCP Snooping, Bridge VLAN Filtering and bounding.
Otherwise for the special router model in CRS3xx series, all features are supported with hardware offload.
What does it mean?
If your configuration is not supported with hardware offload, all traffic will go through the CPU. So you will notice CPU usage is very high when running high network’s throughput.
In this LAB, I’ll show you how to configure VLAN correctly on MikroTik Router
on non-CRS series switches.
All devices are able to be configured with bridge VLAN filtering, but only few of them will be able to offload the traffic to the switch chip. If an improper configuration method is used on a device with a built-in switch chip, then the CPU will be used to forward the traffic.