Method for detecting consistency between control plane and data plane, detection system and switch

Abstract

The invention discloses a detection method and detection system for the consistency of control surface and data surface, and a switch. The detection method for the consistency of control surface and data surface comprises the following steps: a sampling data packet is received through an entry switch, and a label composed of a Bloom filter and a preset vector is inserted into the sampling data packet, so that a processing data packet with an updating label is generated, and then the updating label is initialized; the updating label in the processing data packet is updated through the entry switch, at least one internal switch and an exit switch separately according to the corresponding switch identity and a preset feature matrix; the current updating label is reported to the controller through the exit switch; and the updating label is received through the controller, and whether the control surface is consistent with the data surface or not is verified according to the updating labeland a standard label of the processing data packet confirmed by each switch corresponding to the planned switch path of the sampling data packet. The embodiment of the invention improves the accuracyof detecting the consistency of the control surface and the data surface on the basis of reducing the data processing amount.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method for detecting consistency between a control plane and a data plane, a detection system, and a switch. Background technique [0002] As an emerging network paradigm, Software Defined Network (SDN) decouples the control plane and data plane, centralizes control and aggregates the entire network view, establishes open interfaces on the control plane and data plane, and enables external applications to make the network It is programmable, so as to make up for the shortcomings and limitations of the current network architecture. Among them, the controller guides the forwarding of data packets by installing rules in the switch. However, due to the inconsistency between the control plane policy and the data plane rules, the actual path that the data packet passes may be inconsistent with the expected path preset by the controller, and the inconsistency be...

AI Technical Summary

Problems solved by technology

However, both of the above methods have their own limitations

The probe-based solution takes a long time to generate the probe packet; the label-based solution uses the packet header to match the path table, once the packet header is modified during the forwarding process, the solution cannot be retrieved from the path table. The corresponding entry is found in , that is, the solution cannot handle the case where the packet header is modified

Furthermore, the storage and construction of the path table incurs significant overhead

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