C18 Forward Delay Time. The maximum time that a LE Client will maintain an entry for a non-local MAC address in its LE_ARP cache in the absence of a verification of that relationship, as long as the Topology Change flag C19 is true. lecForwardDelayTime SHOULD BE less than lecAgingTime. When it is not, lecAgingTime governs LE_ARP aging. This time value is expressed in seconds.