Bandwidth-based MBB path calculation method and system

Abstract

The invention discloses a bandwidth-based MBB path calculation method and a system thereof, and relates to the field of communication path establishment. The method comprises the following steps: whena new path needs to be established, acquiring the MBB information of the original path, wherein the MBB information includes the initial available bandwidth of the link between the two adjacent nodes; and calculating the attribute information of the new path conforming to the occupied bandwidth of the new path according to the MBB information, wherein the standard that meets the bandwidth occupied by the new path includes: the initial available bandwidth of the link between two adjacent nodes in the original path, which is above the bandwidth occupied by the new path. The invention is capableof establishing a new path by using the original path on the basis of the available bandwidth of the original path and the bandwidth occupied by the new path. The invention is high in path calculation precision, and is also capable of reducing the packet loss rate when the new path is established, which is not only high in working efficiency, but also capable of guaranteeing the communication quality.

Description

technical field [0001] The invention relates to the field of communication path establishment, in particular to a bandwidth-based MBB (Make Before Break, build before failure) path calculation method and system. Background technique [0002] MBB establishes a new path (also called Modify LSP) before the original LSP (Label Switch Path, Label Switching Path) is removed; during traffic switching, change as much as possible without losing data or occupying additional bandwidth The mechanism of MPLS TE (Multi-Protocol Label Switching Traffic Engineering, Multi-Protocol Label Switching Traffic Engineering) tunnel attributes (such as changing the bandwidth of the original path, or modifying the path, deactivating some of the original paths, and replacing them with other paths, etc.). [0003] The traditional MPLS-TE method for implementing MBB is: when the tunnel attributes need to be changed, the MBB is triggered to establish a new path with a suitable bandwidth. When there are ...

AI Technical Summary

Problems solved by technology

[0005] (1) When the existing MBB establishes a new path, it will judge whether the available bandwidth of the original path is higher than the bandwidth occupied by the new path, and if so, continue to use the nodes of the original path, otherwise the new path cannot be established

[0006] (2) Since the used bandwidth of the original path cannot be known, it is necessary to obtain the port information of each node (such as IP address, next hop, etc.) ) and the used bandwidth of the link between two adjacent nodes, and the process of obtaining the port information (such as IP address, next hop, etc.) of each node and the used bandwidth of the link between adjacent nodes is more complicated ; Specifically, each node other than the head node sends port information and link bandwidth between adjacent nodes to the head node, which will not only reduce work efficiency, but also cause packet loss

Images