PNNI Routing
The Private Network-to-Network Interface (PNNI) is a routing protocol with the following properties:
- It is hierarchical
- It is dynamic
- It is an OSPF-like link-state protocol
PNNI was designed to scale to large ATM networks
PNNI has been tested in real use in the ATM network of Telecom Finland (now Sonera) since 1997
It has been found to work well in a network with several hundred nodes
It can recover from various error situations within a few seconds