To manually determine which router will be the designated router, it is necessary to set the priority of the router. A router interface can have a priority of 0 to 255. The value of 0 means that the router cannot be a designated router or backup designated router; otherwise, the higher the priority, the more favorable the chances are of winning the election.
If there is more than one router on the segment with the same priority level, the election process picks the router with the highest router ID.
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