Each row entry represents an instance of a service FEC sent to
or received from an LDP peer.
Use of AUGMENTS clause implies a one-to-one dependent relationship
between the base table, vRtrLdpServFecTable, and the augmenting
table, vRtrLdpCepTdmFecTable. This in effect extends the
vRtrLdpServFecTable with additional columns.
Creation or deletion of a row in the vRtrLdpServFecTable results
in the same fate for the row in the VRtrLdpCepTdmFecEntry.