Description: The list of VSANs (in the range 2048 to 4096 ) whose operational state is 'up', that this port is associated with. Only ports operating in trunk mode can be associated to multiple VSANs. Each octet within the value of this object specifies a set of eight VSANs, with the first octet specifying VSANs 2048 through 2055, the second octet specifying VSANs 2056 through 2063, etc. Within each octet, the most significant bit represents the lowest numbered VSAN, and the least significant bit represents the highest numbered VSAN. Thus, each VSAN, whose operational state is 'up', that this port is associated with, is represented by a single bit within the value of this object. The corresponding VSAN that this port is a member of is operationally 'up' if and only if that bit has a value of '1'. Note that the zero-length string represents that none of the VSANs that this port is a member of are active. This object is applicable to only ports operating in trunk mode.