4-16z P2MP ( required only when the interface sends packets in the unicast mode)Since the neighbor routers cannot be discovered by broadcasting Hello packets, you must manuallyspecify the IP address of the neighbor router. For an NBMA network, you can determine whether theneighbor has the DR election right.Follow these steps to configure NBMA/P2MP neighbor:To do... Use the command... RemarksEnter system view system-view —Enter OSPF view ospf [ process-id [ router-idrouter-id ] ] RequiredConfigure an NBMA/P2MPneighborpeer ip-address [ dr-prioritydr-priority ]RequiredBy default, the priority for theneighbor of an NBMA interfaceis 1.Configuring the DR Priority on an OSPF InterfaceYou can control the DR/BDR election on a broadcast or NBMA network by configuring the DR prioritiesof interfaces.Follow these steps to configure the DR priority on an OSPF interface:To do... Use the command... RemarksEnter system view system-view —Enter interface view interface interface-typeinterface-number —Configure the DR priority on theOSPF interface ospf dr-priority priority Optional1 by defaultThe DR priorities configured by the ospf dr-priority command and the peer command have differentpurposes:z The priority set with the ospf dr-priority command is used for actual DR election.z The priority set with the peer command is used to indicate if a neighbor has the right to vote. If youspecify the priority to 0 when configuring a neighbor, the local router will believe that the neighborhas no right to vote and sends no Hello packet to it. This configuration can reduce the number ofHello packets on the network during the election of DR and BDR. However, if the local router isalready a DR or BDR, it will send Hello packets to the neighbor whose DR priority is 0 to establishthe adjacencies.OSPF Route ControlPerform the following configurations to control the advertisement and reception of the routinginformation discovered by OSPF and import routing information discovered by other protocols.
