The value of vRtrLdpSessFtRecoveryTimeNego indicates the session's
Fault Tolerant(FT) recovery timeout, it is set to the lesser of the
neighbor advertised FT recovery timeout,
vRtrLdpSessFtRecovTimeRemaining and the local timer
maximum recovery time, vRtrLdpGenGRMaxRecoveryTime. It is within
this period that label-FEC binding message exchanges are expected
to complete. Any stale FEC entries left after this time will be
deleted from the FEC table.