Designated router issues: Recall from your CCNA studies that a broadcast network
(for example, an Ethernet network) OSPF elects a designated router (DR), with
which all other routers on a network segment form an adjacency. Interestingly, OSPF
attempts to elect a DR on an NMBA network, by default. Once again considering
Figure 1-14 , notice that only Router HQ has a direct connection to the other routers;
therefore, Router HQ should be the DR. This election might not happen without
administrative intervention, however. Specifically, in such a topology, you would
need to set the OSPF Priority to 0 on both Routers BR1 and BR2, which prevents
them from participating in a DR election.
TCP/IP