vRtrLdpAggrPreMatchTable keeps information about
aggregate prefix match procedures.
Use of AUGMENTS clause implies a one-to-one dependent
relationship between the base table, vRtrLdpGeneralTable,
and the augmenting table, vRtrLdpAggrPreMatchTable. This in
effect extends the vRtrLdpGeneralTable with additional
columns. Creation or deletion of a row in the
vRtrLdpGeneralTable results in the same fate for the row
in the vRtrLdpAggrPreMatchTable.