Hi @msatter
as i said, HW offloading working well in v6.xx (without rstp)
so, i know what is the difference between old master-slave and new /interface ethernet switch
i am talking about ROS v7.x and kernel v5
very simple config
# model = RouterBOARD 750G r3
# serial number = 6F38085A9ED2
/interface bridge add name=BR-Switch protocol-mode=none
/interface vlan add interface=BR-Switch name=vlan2 vlan-id=2
/interface ethernet switch port set 5 vlan-mode=secure
/ip vrf add list=all name=main
/interface bridge port add bridge=BR-Switch interface=ether1
/interface bridge port add bridge=BR-Switch interface=ether2
/interface ethernet switch vlan add independent-learning=no ports=switch1-cpu,ether1,ether2 switch=switch1 vlan-id=2
/interface ethernet switch vlan add independent-learning=no ports=switch1-cpu,ether1,ether2 switch=switch1 vlan-id=1
/ip dhcp-client add disabled=no interface=vlan2
...does not work
same setup, ROS v6, working