Sophos XG: VLAN Wifi different physical Interfaces

Question

Hi, 
 I have 2 physical interfaces and both are lan zones. They should be separate networks. There should be no traffic between both of them. 
 I have 4 Sophos APs on interface A. There should be Wifi bridged into lan A. 
 Before I ordered switches with vlan functionality I already bridged wifi to lan A. 
 Now I want to have a second SSID bridged to the lan B network but how do I do that? Create vlan on interface A and a bridge with vlan and interface B? Or Create vlan on interface B and in wifi settings set the option bridge to vlan and this is enough? 
 Here is a picture for what I mean.

FormerMember · Answer

Hi Sascha Benecke1 , 
 Thank you for reaching out to Sophos Community. 
 As mentioned you're willing to have other SSID bridged to the LAN B network. You only need to add the VLAN interface on PortB interface and then tag the wireless network with correct VLAN id. 
 Check more information at Bridge wireless traffic from an external Sophos access point to VLAN