This is the startup timer duration that is used when DC-RTM is activated and routing state has been retained by the forwarding table as part of graceful restart procedures. This timer duration is used when rtmEntityFtStateRetained is 'true'. It determines the maximum length of time before DC-RTM deems that routing table convergence is complete and hence the maximum length of time before DC-RTM sends routing updates to the forwarding table. This is typically set to a value greater than the restart timer duration of each routing protocol, so that the routing table can converge before the forwarding table is updated.