Vlan Group

Not an expert, but in the absence of a more authoritative response, a VLAN group is synonymous with a layer 2 bridge between two VLANs in the same layer 3 subnet space. Per the support site, "VLAN groups are intended for load balancing traffic in a Layer 2 network, when you want to minimize the reconfiguration of hosts on that network. A VLAN group also ensures that the BIG-IP system can process traffic successfully between a client and server when the two hosts reside in the same address space" and is another way of avoiding SNAT.

Thanks Kevin.... also if you can provide some understanding on different modes of VLAN grouping transparent, translucent and Opaque.