OSPF PCI
3 - Open Shortest Path First
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Depending on OSPF type the OSPF header carries different protocol information.
All OSPF packet types use a common PDU header; the OSPF data part varies depending on the OSPF type:
Type Packet name Protocol function
1 Hello Discover/maintain neighbors
2 Database Description Summarize database contents
3 Link State Request Database download
4 Link State Update Database update
5 Link State Ack Flooding acknowledgment
Literature/Sources:
This description is based on RFC 1247.