International Business Machines Corporation
Switch monitoring statistics gathering at servers and gateways for overlay networks

Abstract:

In one embodiment, a method includes creating on a per-tunnel basis, by a hardware processor, statistics about overlay-encapsulated packets which are received by or sent by the hardware processor across an overlay network, including counting events associated with de-encapsulation of one or more inner packets from an overlay-encapsulated packet; recording, by the hardware processor, the statistics in association with a virtual network identifier and a tunnel identifier that identifies a tunnel on which the overlay-encapsulated packets are received or sent; and maintaining, by the hardware processor, a table indexed for the virtual network identifier and the tunnel identifier, the table including the virtual network identifier; the tunnel identifier; and statistic bucket identifiers pointing to locations where statistics associated with the virtual network identifier and the tunnel identifier are stored.