There are five types of OSPF packets: Hello Packet, Database Description Packet (DD), Link State Request Packet (LSR), Link State Update Packet (LSU), Link State Acknowledgment Packet (LSA). All five types of OSPF packets have the same packet header format, and the header of each type of packet is 24 bytes long.
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OSPF Packet Header Format Details
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There are five types of OSPF packets: Hello Packet, Database Description Packet (DD), Link State Request Packet (LSR), Link State Update Packet (LSU), Link State Acknowledgment Packet (LSA). All five types of OSPF packets have the same packet header format, and the header of each type of packet is 24 bytes long.