This determines whether ATM circuits using this profile will have the Cell Loss Priority bit set on all their transmitted cells, marking them as eligible to be dropped first under network congestion. Administrators enable this on profiles for lower-priority or best-effort traffic so that during congestion, the network preferentially discards these cells before higher-priority traffic. Setting this object to true on a profile used for bulk background data transfers means those cells will be the first candidates for discard if the ATM network becomes congested.