Applications using the Internet already have access to some topology information of Internet Service Provider (ISP) network.

There is a working-draft discussed now at the IETF, quite promising, entitled draft-ietf-alto-multi-cost-09 with an intended status of standard track.

The ALTO (Application Layer-Traffic Optimization) Protocol ([RFC7285]) defines several services that return various metrics describing the costs between network endpoints.

The document defines a new service that allows an ALTO Client to retrieve several cost metrics in a single request for an ALTO Filtered Cost Map and Endpoint Cost Map. In addition, it extends the constraints to further filter those maps by allowing a client to specify a logical combination of tests on several cost metrics.