When route tables cannot be retrieved, or retrieved route tables lack the required information to calculate A/B paths, you can manually create a fix-up route table to complete the path calculation.
1.On a map, right-click the target device BJ_R3, and select Data Tables > Fix-up Route Table.
1)Enter the destination IP address in the Destination Subnet field.
2)Enter the subnet mask.
3)Select an outbound interface for BJ_R3.
4)Enter the next-hop IP address.