Issues With OSPF

• OSPF relies on the distributed routing table to be accurate

• • Implementation bugs and major link instability cause bizarre failures

• Hackers can still spoof bogus route updates

• • Most networks don’t use hashed authentication

• Load balancing between equal metric paths is challenging

• • Out of order delivery
  • Oscillation

• Complexity

• • Five messages
  • Three algorithms (Dijkstra, flooding, exchange)
  • A lot of code