A string of octets containing one bit per VLAN. The
first octet corresponds to VLANs with VlanId values
1 through 8; the second octet to VLANs 9 through
16 etc. The most significant bit of each octet
corresponds to the lowest VlanId value in that octet.
This is the set of vlans configured by management to dis-associate
from the management interface.
Get operation is not allowed for this object.