This object specifies the list of VLANs configured to be
blocked at the alternate port for VLANs with values of 3072
through 4095. If the bit is set to '1', then the VLAN is marked
for blocking.
This value is only effective on the device acting as the REP
primary edge. In addition, this value is effective only if
'crepLoadBalanceBlockPortType' is not 'none'. This object is
only instantiated on devices that support the extended VLANs.