There is network topology of customer’s company. Between four equipments, OSPF protocol is used for route advertisement. Two switches are VRRP gateway such that A-S5720 is master switch and B-S5720 is backup switch. Customer wants to control the route path so that all traffic will route from A-S5720 to A-USG6620 first.
We can use OSPF interface cost to control the routing path. If the cost is lower, it will first be selected as routing path. By designing the OSPF cost as attached diagram, the problem can be solved.