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cisco braindumps reddit.The router with the highest priority or the largest router ID (rather than the largest IP address on the link) will become the DR, but only on multi-access segments; on point-to-point links, DR/BDR is not used. setting the priority to 0 means that the router will never become the DR or BDR.19.2.4 Sharing Routing InformationAfter electing DRs and BDRs, routers continue to generate Hello to maintain communication; this is called the preboot state, and routers in this state are ready for sharing link state information. The process that routers go through is called the switching process and is outlined below.1. pre-start (Exstart) state: The DR and BDR establish adjacencies with other OSPF routers in the network segment. Next, in each adjacency, the router with the higher router ID becomes the primary router and initiates the switching process(shares its link state information). Note that the DR is not necessarily the master router in the switching process. The other router in the adjacency relationship is the slave router.2. Exchange: The master router first shares its link state information with the slave router.Exchange state: The master router first shares its link state information with the slave router, which sends a message called a database description packet (DBD), also called a DDP.The DBD contains the link state type, the ID of the advising router, the overhead of the advising link, and the sequence number of the link. The slave router responds with an LSACK to acknowledge the DBD sent by the master router. Next, the slave router compares the information in the DBD with its own link state information.3. LoadingLoading status: If the master router's information is newer than the slave router's, the slave router will use the link status request to respond to the DBDo sent by the master router Next, the master router sends a link status update to the slave router