A quality-of-service-based fault detection method, system and device

Abstract

The present invention provides a quality of service (QoS)-based fault detection method, system and device. The route receiver associates the routes for the same route issuer and with the same QoS with the same BFD session, and for each BFD session Establish detection tunnels with route publishers respectively; route receivers periodically send BFD packets encapsulated with tunnel headers on the detection tunnels. If no BFD packets are received within the set time for sending BFD packets, the BFD packet The route associated with the BFD session corresponding to the message is abnormal; the tunnel source address contained in the tunnel header is the IP address of the route receiver, and the tunnel destination address is the IP address of the route publisher; the source address of the BFD packet is the route publisher The destination address is the IP address of the routing receiver. The invention can realize routing fault detection with different QoS on the same path.

Description

technical field [0001] The invention relates to network communication technology, in particular to a fault detection method, system and device based on quality of service. Background technique [0002] Quality of Service (QoS) is a security mechanism of the network, a technology used to solve the problem of network delay and congestion, and is gradually used in conjunction with routing technology to provide different service requirements for different users. The usual application scenario is: the route publisher sets specific route attributes for the route, such as community attribute, extended community attribute, AS_PATH attribute, etc., and carries the route attribute when announcing the route. After receiving the route notified by the route publisher, the route receiver obtains the carried route attribute, and sets QoS parameters for the route according to the route attribute, including IP priority, QoS local identifier, etc. These QoS parameters need to be delivered to...

AI Technical Summary

Problems solved by technology

In view of this situation, the fault detection mechanism in the prior art can only perform bidirectional forwarding detection (BFD) on the path between R1 and R2, but routes with different QoS have different transmission requirements such as congestion and packet loss conditions, so , the requirements for path switching are also different, which requires fault detection for routes with different QoS respectively. Obviously, the existing technology cannot meet this requirement

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