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The main VLAN setting is vlan-filtering, which globally controls VLAN awareness and VLAN tag processing in the bridge. Bridge VLAN Filtering configuration is highly recommended to comply with STP (802.1D), RSTP (802.1w) standards and it is mandatory to enable MSTP (802.1s) support in RouterOS. This set of features makes bridge operation more like a traditional Ethernet switch and allows to overcome Spanning Tree compatibility issues compared to the configuration when tunnel-like VLAN interfaces are bridged. Since RouterOS version 6.41, a bridge provides VLAN aware Layer2 forwarding and VLAN tag modifications within the bridge.
Mikrotik crs309 series#
On CRS3xx series switches, bridge STP/RSTP/MSTP, IGMP Snooping and VLAN filtering settings don't affect hardware offloading, since RouterOS v6.42 Bonding interfaces are also hardware offloaded.
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In order to set up a port switching on CRS3xx series switches, check the Bridge Hardware Offloading page. This table clarifies the main differences between Cloud Router Switch models.