One of the major weaknesses of existing peer-to-peer

networks is that their overlay structures do not reflect

the underlying Internet topology, resulting in

unnecessary consumption of network resources. We

propose a Geographical Longest Prefix Matching (Geo-

LPM) scheme to self-organise nodes into clusters using

IP prefixes and network metric measurements. Geo-

LPM efficiently locates nodes to produce superior

overlays while optimising the usage of network

resources. It is simple, scalable and self-organising.