This object is valid only when cevcSIVlanRewriteDirection is
'ingress'. The value 'true' of this column specifies that
egress packets are tagged with a VLAN specified by an active
row in cevcSIPrimaryVlanTable.
There could only be one VLAN value assigned in the
cevcSIPrimaryVlanTable, i.e. only one 'active' entry
that has the same index value of cevcSIIndex column and
corresponding instance of cevcSIPrimaryVlanEndingVlan
column has value '0'.