Proactive source-based reverse path validation in computer networks

摘要

In one embodiment, a network device may receive an indication of a particular future message time, and determines a path validation time that is prior to the particular future message time by an amount at least long enough to detect and report a route change of a path from the network device to a source of the particular future message, wherein the source utilizes the path in reverse to reach the network device for the particular future message. Accordingly, the network device sends, at the path validation time, a keepalive message on the path, where in response to a failure of the keepalive message on the path, the network device repairs the path to the source with a particular route change, and reports the particular route change to the source, e.g., such that in response, the source may transmit the particular future message on the changed path in reverse.

主权项

1. A method, comprising:
receiving, by a network device, an indication of a particular future message time and an address of a destination within a header of a message that is sent from a source in the network to the destination, wherein the particular future message time indicates when a particular future message will also be sent by the source to the destination; determining a path validation time that is prior to the particular future message time by an amount at least long enough to detect and report a route change of a path from the network device to the source of the particular future message, wherein the source utilizes the path in reverse to reach the network device for the particular future message; sending, from the network device at the path validation time, a keepalive message on the path; and in response to a failure of the keepalive message on the path:
i) repairing the path to the source with a particular route change; andii) reporting the particular route change to the source.