OSPF

• Open Shortest Path First

  • “Open” means it is public domain
  • Uses “Shortest Path First” algorithm – sometimes called “the Dijkstra algorithm”

• IETF Working Group formed in 1988 to design an IGP for IP

• OSPF v1 published in 1989 – RFC1131

• OSPF v2 published in 1991 – RFC1247

• Developments continued through the 90s and today

  • OSPFv3 includes extensions to support IPv6

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