• Design OSPF networks.
• Design IP addressing schemes suitable for route summarisation.
• Troubleshoot OSPF networks.
• Describe the operation of OSPF.

OSPF
History of OSPF, metrics, costs, convergence, Distance Vector vs. Link state routing protocols, IGPs, classless, OSPF features, load sharing, per packet/destination, OSPF authentication. Hands on: Configuring OSPF features.

OSPF within an area
How OSPF works, LSDB, LSDB benefits and disadvantages, LSA types, Type 1 and 2, LSA propagation, router IDs, hellos, configuring hellos, the exchange protocol. Hands on: Investigating OSPF structures.

Areas
Scalability, why areas? Area IDs, area 0, ABRs, ABR resilience, areas & LSDBs, areas & LSAs, Type 3 LSAs, virtual links. Hands on: Multi area OSPF.

Redistribution
Multiple routing protocols, common scenarios, routing distance, External LSAs, E1 and E2. Type 4 LSAs. OSPF and default routes. Hands on: Configuring static route redistribution.

Route aggregation
Route summarisation. How to aggregate, ABR summarisation, ASBR summarisation. Hands on: OSPF address summarisation.

OSPF packet Formats
OSPF packets, protocol stack, OSPF stages, packet flows, packet types, the OSPF header, multicasts, Hello, DDB, LS request, LS update, LS ACK, LSA header, LSA formats, neighbours, neighbour states, DRs, adjacencies, BDRs, DR election. Hands on: Analysing OSPF packets, troubleshooting.

OSPF network types
BMA, NBMA, Point to point links. Hands on: Configuring OSPF over Frame Relay.

OSPF stub areas
LSA types, area types, area architecture, stub areas, default routes, benefits and disadvantages of stub areas, TSSAs, NSSAs, Type 7 LSAs. Hands on: Stub and TSSA configuration..

The OSPF MIB
SNMP overview, MIB 2, the OSPF MIB, OSPF MIB groups, useful objects, OSPF traps. Hands on: the OSPF MIB. troubleshooting.

Summary
RFCs, OSPF design guidelines.

OSPF variants (appendix)
OSPF on demand, MOSPF, multicast overview, Type 6 LSAs, OSPF for IPv6 (OSPFv3).