@projectdp @r3pek bridges are local but then you could always add a tagged physical interface to every bridge and then have vlans that span through the cluster. But you'd have to configure your physical switch to know about every such vlan.
With VXLAN you can have a flat no-vlan network between the nodes, and then only use software to configure a complex network.
Another benefit - VXLAN connects across the nodes even in different data centers as long as you have any (routed, firewalled, wan) connectivity between your hypervisors.