OSPFv3 packets

OSPFv3 uses the following packet types:

• Hello—Periodically sent to find and maintain neighbors, containing timer values, information about the DR, BDR, and known neighbors.

• DD—Describes the digest of each LSA in the LSDB, exchanged between two routers for data synchronization.

• LSR—Requests needed LSAs from the neighbor. After exchanging the DD packets, the two routers know which LSAs of the neighbor are missing from their LSDBs. They then send an LSR packet to each other, requesting the missing LSAs. The LSA packet contains the digest of the missing LSAs.

• LSU—Transmits the requested LSAs to the neighbor.

• LSAck—Acknowledges received LSU packets.