Peering matrix is based on sampled flow (sFlow) data, a package sampling technology included in the CATNIX switches, and has granularity to show all traffic exchanges, only the bilateral ones or only those run through the route-server. This tool is accessible through the private statistics portal offered by CATNIX.
The Peering matrix has its origin in the IXP Manager platform created by INEX, the internet peering point for the island of Ireland.