(TTL) values. Take as an example the sequence 1, 3, 8, 64, the 1-hop neighbours receive the LSA every ?s, so they have the most updated information. 2-hop neighbours receive the LSA with TTL 3, 8, 24. Nodes at a distance from 4 to 8 hops receive only the LSA with TTL 8 and 64. All the others receive only the LSA with TTL 64. As a consequence every node has progressively less updated information on the network topology as the distance increases.

The protocol exploits the fact that when a packet moves from a source to a destination, the