What is the default OSPF priority value for routers?

The default OSPF priority value for routers is zero. This value affects the election of the designated router (DR) and backup designated router (BDR) within a broadcast network segment. When the priority is set to zero, the router is ineligible to become a designated router or backup designated router. Consequently, OSPF routers with higher priority values will be preferred during the election process. By default, all routers start with a priority of zero, which means additional configuration is necessary to allow any of them to participate in the DR/BDR election on multi-access networks. This design choice helps prevent unnecessary election processes among all routers and ensures that only those expressly configured to participate can do so.