Reverse Path Validation for Source Routed Networks

摘要

A packet forwarding validation method comprising receiving a data packet that comprises a next-hop index and a plurality of next-hop identifiers, wherein the next-hop index references a next-hop identifier from the plurality of next-hop identifiers, and wherein the plurality of next-hop identifiers indicates a sequence of next-hops through a network for the data packet, identifying a previous-hop network node using the next-hop index and the plurality of next-hop identifiers, determining a transmitter network node of the data packet, comparing the previous-hop network node and the transmitter network node, detecting a forwarding error when the previous-hop network node and the transmitter network node are not the same, and processing the data packet when the previous-hop network node and the transmitter network node are the same.

主权项

1. A packet forwarding validation method comprising:
receiving a data packet that comprises a next-hop index and a plurality of next-hop identifiers, wherein the next-hop index references a next-hop identifier from the plurality of next-hop identifiers, and wherein the plurality of next-hop identifiers indicates a sequence of next-hops through a network for the data packet; identifying a previous-hop network node using the next-hop index and the plurality of next-hop identifiers; determining a transmitter network node of the data packet; comparing the previous-hop network node and the transmitter network node; detecting a forwarding error when the previous-hop network node and the transmitter network node are not the same; and processing the data packet when the previous-hop network node and the transmitter network node are the same.