Kana DR itsva ipapo 'anoenda pasi' uye yepakutanga DR zvino iripo, achiri kare akasarudzwa BDR achava DR.DRs kuvapo nechinangwa yokuderedza samambure motokari nokupa kunobva routing inogadziridza. DR anoramba yakakwana topology tafura pomumbure uye anotumira reserved kune dzimwe routers Via multicast. routers All vari Multi-kuwana samambure chidimbu kuchaita muranda / tenzi ukama pamwe DR. Vachava adjacencies pamwe DR uye BDR chete. nguva imwe router anotumira update, anotumira kuti DR uye BDR pamusoro multicast 224. DR anogona zvino kutumira kunze zvachose dzimwe routers zvose muna multicast nharaunda, kuti 220.
DR uye BDR