Modifying Internal Routing Costs

The set_router_tax command lets you adjust the internal costs used by the router. Currently, only the wrongway cost can be taxed and it is only recognized by the detail router. A wrongway tax specifies the relative cost of using a wrongway path to complete a connection versus using a preferred direction path and possibly additional routing. A real value greater than 0.0 and less than 100.0 can be specified and represents a multiplier to the internal wrongway cost set by the router. A tax greater than 1.0 tends to reduce the amount of wrongway routing and increase the number of vias used. A tax less than 1.0 and greater than 0.0 tends to increase the amount of wrongway routing used. The default value is 1.0.

For the current value of the wrongway router tax, use get_router_tax.

Related Topics

Preparing the Routing Environment