The value of tRPAdminPSDefActionMetricSource specifies the source of the default action metric. This object should only be set to igpCost(1) when the object tRPAdminPSDefaultActionMetric is set to replace(4). When the value of tRPAdminPSDefActionMetricSource is set to 'igpCost(1)', the value of tRPAdminPSDefaultActionMetricValue and tRPAdminPSDefActMetricParam are ignored; and the value of MED (Multi Exit Discriminator) or the metric value is derived from the IGP (Interior Gateway Protocol) cost of the route. The default value of tRPAdminPSDefActionMetricSource is 'metricVal(2)' which means the metric value is the value of tRPAdminPSDefaultActionMetricValue. The value of the object tRPAdminPSDefActMetricParam is ignored. The value 'metricParam(3) means the metric value is derived from the object tRPAdminPSDefActMetricParam; the value of the object tRPAdminPSDefaultActionMetricValue is ignored.