The value of vRtrLdpServFecNumInLabels gives the number of
labels that have been sent to the peer associated with this
FEC. This value also indicates which of the following
vRtrLdpServFecInLabel1 thru vRtrLdpServFecInLabel5
entries contain valid information i.e. if the value of
vRtrLdpServFecNumInLabels is 3 then vRtrLdpServFecInLabel1,
vRtrLdpServFecInLabel2 and vRtrLdpServFecInLabel3 will
contain valid label information.