Other nice features of OSPF

• Authentication (optional)
• Equal-cost multipath
  • more than one "best" path - share traffic
• Proper classless support (CIDR)
• Multiple areas
  • For very large networks (>150 routers)
  • Aggregate routes across area boundaries
  • Keep route flaps within an area
  • Proper use of areas reduce bandwidth and CPU utilisation
  • Backbone is Area 0

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