this post was submitted on 12 Sep 2024
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Mikrotiks normally have hardware acceleration for VLANs and switching for only 1 bridge. Beyond that, traffic has to go through the CPU.
Multiple bridges were one of the old ways, before hardware offloading.
The way to do it is to have 1 bridge, register the vlans on the bridge, tag/untag all the bridge ports as appropriate, set PVIDs as appropriate. Add 2 VLAN interfaces (this gives the CPU access to the VLAN), add static IPs to the vlan interfaces, set up DHCP appropriately.
Always worth taking a backup of the config, then enable hardware offloading last. If you end up locking yourself out, reset and reload the config, figure out what you did wrong.
Enable safe mode too? If there’s a problem while in safe mode just power cycle the router and the last good config before safe mode enables should come back up.
I’d still do a backup in addition to play it safe though.