VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A 32 bit IPv4 address followed by a 64 bit Route Target

A 32 bit IPv4 address followed by a 64 bit Route Distinguisher

A 64 bit Route Target followed by a 32 bit IPv4 address

A 64 bit Route Distinguisher followed by a 32 bit IPv4 address

A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32 bit IPv4 address