Let us consider a simple network scenario as shown below:

Routers in the network have both an Ethernet interface and a WAN interface. NetSim supports OSPF messages, Router LSAs, and generates OSPF logs as per RFC 2328.

Router properties can be accessed by right-clicking on the router and selecting properties:

Users can configure OSPF global properties, which apply to all routers in the current network, from the APPLICATION_LAYER settings, as shown below

The output cost can be configured in the Interface layer under the OSPF protocol properties in the Application layer.

NOTE: The Output Cost parameter is a local property. Hence it is the responsibility of the User to change it in the interfaces layer under OSPF of the routers present in the scenario.

Other related articles: What is the OSPF default cost? How is OSPF metric value calculated in NetSim?