Hello, in switch sg350x I don't see Rapid per-VLAN Spanning Tree Plus...Support it...?

Hello, i have double conected my switch sg350X from switch1.In sg350X i have ports 1-10 in VLAN 1 and ports 11-20 in VLAN 2.In ports 1 and 11 i have uplink from switch1. But here is problem: ports working only 1-10 but ports 11-20 in VLAN 2 doesnt wo...

Hello, i have SG350X switch and i would like to ask about STP backup port:For example i have double connect switches or i have ring topologyIn STP i see (1. port)- active (2. port)- backup and i want swap this to: -- (2. port)- active (1. port)- back...