Hi Visconti,
If I understand your question, when you set up routing interfaces on a 'switch' (we should say 'router' at this point ), it will route between those interfaces without hesitation. There is no need to 'connect' those interfaces, router will have all directly connected networks (VLANs with IP addresses that are up, i.e. at least one interface in that VLAN is active) in its routing table so it can route. You could limit that with Policy on B5 or Policy/ACL on EXOS.
Hope that helps,
Tomasz