OSPFv3 is an OSPF version used primarily to route IPv6 networks and also capable of supporting IPv4. It forms neighbor relationships, exchanges link-state advertisements (LSAs), builds a link-state database (LSDB), and calculates shortest paths with Dijkstra’s algorithm. section 18.5
Key operational points include:
- Floods LSAs throughout an OSPF area, where routers maintain the same LSDB. section 18.5
- Uses cost as its metric; path cost accumulates the outgoing interface costs. section 18.5
- Supports multi-area designs centered on backbone area 0, reducing LSDB size, SPF computation, and instability scope. section 18.5
