CCIE Lab Diary – OSPF Lab

This one is a bit late, but hey better late than never. BGP is next so hopefully no more frame relay.


Implement OSPF in a 9 router network with frame relay as the underlying L2 encapsulation to demonstrate protocol behaviours in a NBMA environment. Also involves tweaking of various parameters using summarization, redistribution, distribute lists, virtual links, LSAs etc.

Technologies involved:

  • Serial interfaces
  • Ethernet interfaces
  • Frame Relay
  • OSPF

Logical topology


Pitfalls/Things to watch out for

  • OSPF LSA database vs. router’s route table
  • OSPF network types and timers