You can perform Edge Core Router configuration using the following steps:
sflow receiver 1 {NETFLOW_SERVER_IP} port {NETFLOW_SERVER_LISTENER_PORT}
Enter global configuration mode on the router or MSFC, and issue the following commands for each interface on which you want to enable flow:
interface {INTERFACE_NAME}
sflow flow-sampling 1024 1
sflow counter-sampling 30 1