This integer, from 0 to 31 with a default of 1, is the distance metric added to inbound distance vectors received on this DVMRP interface. An admin increases this to make routes learned through this interface appear more costly internally, steering the router to prefer routes learned via other DVMRP interfaces when a choice exists. Setting it to 3 adds 3 hops of cost to every route learned in through this interface before it's compared against alternatives.