I also have one question / issue which I'm not sure about. Setup: Firewall <--> (trunk allowed vlan 140, 141) Switch 1 MS130 (trunk all) <--> (trunk all) Coreswitch MS390 (trunk all) <--> (trunk all) Switch 2 MS130 (trunk allowed vlan 10, 140) <--> MR46   I can see the MAC address of the firewall interface in vlan 140 on Switch 1. But not on the Coreswitch or Switch 2. Seems as if the Coreswitch ignores VLAN140.   What is the right way to troubleshoot this? I just configured one port of the Coreswitch as access vlan 140 port and then vlan140 was available also on Switch 2. ... View more