Method and system for establishing PCEP (Path Computation Element Communication Protocol) session and equipment

Abstract

The embodiment of the invention discloses a method and a system for establishing a PCEP (Path Computation Element Communication Protocol) session and equipment. The method comprises the following steps: receiving equipment receives a notification message transmitted by transmitting equipment, wherein the notification message carries information about whether the transmitting equipment supports computation path operation or not; the receiving equipment determines whether the transmitting equipment supports the computation path operation or not according to the information about whether the transmitting equipment supports the computation path operation or not in the notification message; when the receiving equipment determines that the transmitting equipment does not support the computation path operation, PCEP session which does not support the computation path operation is established between the receiving equipment and the transmitting equipment. By applying the method, the system and the equipment, the PCEP session which does not support the computation path operation can be established between a PCC (Path Computation Client) and a PCE (Path Computation Element) Server, so that the computation path operation between the PCE Server and the PCC is automatically obstructed and manual intervention is avoided.

Description

technical field [0001] The present invention relates to a Path Computation Element Communication Protocol (PCEP, Path Computation Element Communication Protocol), in particular to a method, system and device for establishing a PCEP session. Background technique [0002] With the development of network technology, the network topology becomes more and more complex, the amount of routing is huge, and the path calculation becomes more and more complicated. The deployment of traffic engineering requires network devices to calculate routes under complex constraints. These constraints include not only static constraints, such as the distance between router nodes, bandwidth, and line capacity of optical network equipment, but also dynamic constraints. Conditions, such as network failure status, network congestion information, etc. [0003] The Path Computation Element (PCE) Internet Engineering Task Force (IETF) proposed a PCE-based network structure, in which the Path Computation...

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Problems solved by technology

[0006] According to the above-mentioned prior art, the inventor found that: to avoid the impact of PCE Server on the existing network, manual intervention must be used to block the path calculation request and path calculation reply between PCE Server and PCC, which is cumbersome and inefficient. , error prone

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