Sophos Bridge Interface and Segregating traffic inside the switch using VLAN's

Hello All,

I hope u will be able to help me.

I'm using bridge interface which gives me nice one subnet segregation. Everything works fine only if every interface Port1, Port3,... inside bridge have separate switches for each port.

But this is impossible in real environment and I need to bring everything working under one switch. So I try using VLAN's inside the switch only and fail badly. I think because switch try to route package to the bridge interface IP and IP is the same for all the VLAN's. This is just my theory...

If that is the case is there a way how could I achieve this? Switch is dell N1548 series.

Thanks

Zee