This OID holds a signed 32-bit integer metric that represents the routing cost or priority weight assigned to a particular interface on the gateway. A network engineer uses this value when tuning routing protocols like OSPF or static routes to prefer certain paths over others—lower costs mean the path is more desirable. For instance, a cost value of 10 on a fast fiber link tells the routing protocol to favor that path, whereas a cost of 100 on a slower backup link makes it less preferred.