Packet switch modeling and using a packet switch model to test a packet switch

摘要

Packet switch test methods include receiving a first packet from a packet switch, receiving a second packet from processing circuitry configured to model expected behavior of the packet switch, comparing the first packet to the second packet, and, based on the comparing, determining whether the packet switch is operating according to the expected behavior. Packet switch modeling methods include identifying functionality of a packet switch to be modeled, creating, in a packet switch model, a plurality of nodes representing physical and/or logical elements of the packet switch, the nodes being configured to process packet data structures and to respectively model different portions of the functionality of the packet switch relative to one another, and, in the packet switch model, connecting the nodes with pathways by which the packet data structures may be forwarded between the nodes.

主权项

1. A packet switch test method comprising:
receiving a first packet from a packet switch, wherein the first packet is modified by the packet switch; receiving a second packet from processing circuitry configured to model expected behavior of the packet switch, wherein the processing circuitry is configured to modify the second packet based upon the expected behavior independently from the packet switch, and wherein the second packet is a model data structure generated responsive to a request received at the processing circuitry referring to two or more fields of the model data structure; comparing one or more fields of an OSI laver-two header of the first packet to one or more fields of an OSI laver-two header of the second packet on a field by field basis to ensure no mismatches between same fields in each of the first packet and the second packet while ignoring contents of bits that are considered to be payload in relation to the OSI laver-two header associated with each of the first packet and the second packet; and based on the comparing, determining whether the packet switch is operating according to the expected behavior or deviating therefrom and providing details regarding any mismatched fields between the first packet and the second packet.