Publishing method, publishing apparatus and system of inter-domain link information

Abstract

The present invention provides a method, device and system for publishing inter-domain link information. The method comprises: a first path calculating unit obtaining inter-domain link information between each administered autonomous system domain and a neighbor autonomous system domain; the first path calculating unit publishing the inter-domain link information to a second path calculating unit through a self-contained inter-domain route example, both the first path calculating unit and the second path calculating unit comprising the inter-domain route examples, and the inter-domain route example contained in the first path calculating unit and the inter-domain route example contained in the second path calculating unit belonging to the same inner gateway protocol domain. Embodiments of the invention can implement publishing of the inter-domain link information among different path calculating units.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a method, device and system for distributing inter-domain link information. Background technique [0002] In the traffic engineering (Traffic Engineering, TE) network of multi-path computing element (Path Computation Element, PCE) and multi-autonomous system (Autonomous System, AS) domain, there are two types of interconnection models between PCE, one is hierarchical PCE Model (Hierarchical PCE), one is cooperative PCE model (Cooperative PCE). Regardless of the type of model, in order to better calculate the cross-domain end-to-end path, at least one PCE needs to obtain all inter-domain link information in the entire network. Specifically, in the hierarchical PCE model, the parent PCE needs to know the inter-domain link information of the entire network, and in the cooperative PCE model, all PCEs or some designated PCEs need to know the inter-domain link in...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the solution provided by RFC 5392 can be used to realize the release of inter-domain link information in the local domain, but the inter-domain link information between two domains cannot be obtained by other domains

For example, the system includes the PCE of domain A, the PCE of domain B, and the PCE of domain C. The PCE of domain A or the PCE of domain B can obtain the inter-domain link information between domain A and domain B. However, the PCE of domain C The inter-domain link information between domain A and domain B cannot be obtained

Since the inter-domain link information between two domains cannot be obtained by the cross-domain PCE, the end-to-end path across multiple domains cannot be calculated more optimally

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