The value of tmnxSapTlsExProcCpmTrfcSapDn is applicable to simple SAPs configured on simple LAGs that are not part of any 'endpoint' configurations or complicated resiliency schemes like MC-LAG with inter-chassis-backup (ICB) configurations. When enabled, a simple LAG SAP will not be removed from the forwarding plane and flooded traffic (unknown unicast, broadcast and multicast) will be dropped on egress rather than ingress.This allows control traffic to be extracted on egress and where applicable processed by the CPM. The value of tmnxSapTlsExProcCpmTrfcSapDn will not prevent a VPLS service from entering an Operational Down state if it is the last active connection to enter a non-operational state. By default, without this value, when a LAG enters a non-operational state it is removed from the forwarding plane and traffic is dropped on ingress.