Method, apparatus and system for forwarding service flow

Abstract

The embodiment of the invention provides a method, apparatus and system for forwarding service flow. The method comprises the following steps: obtaining a starting forwarding node and an ending forwarding node of the service flow, wherein the starting forwarding node and the ending forwarding node are located in at least one autonomous system AS, and nodes in the AS exchanges routing information based on BGP; determining a BGP path of the service flow according to the starting forwarding node, the ending forwarding node and the BGP topology in the at least one AS, wherein the BGP topology is determined based on the BGP peer information of the at least one AS, and the BGP peer information is used for indicating the BGP connecting relationship between the nodes in the at least one AS; and sending the corresponding forwarding information to each node on the BGP path, wherein the BGP path comprises a plurality of nodes, the plurality of nodes are in one to one correspondence with multiple pieces of forwarding information, and each piece of forwarding information in the multiple pieces off forwarding information is used for indicating the corresponding to node to forward the service flow according to the BGP path. Compared with the prior art, the method, apparatus and system provided by the embodiment of the invention has the advantages that the BGP path is calculated based on the BGP topology, and the maintenance cost of the network can be reduced.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and more specifically, relate to a method, device and system for forwarding service flows. Background technique [0002] The Border Gateway Protocol (Border Gateway Protocol, BGP) is a routing protocol for dynamically exchanging routing information between autonomous systems (Autonomous Systems, AS) and within the AS. AS refers to a group of routers under the control of an administrative organization. Two routers that exchange routing information based on the BGP protocol are each other's BGP peers (BGP Peer, or also called BGP neighbors). When two BGP peers exchanging routing information are located in the same AS, the relationship between the two BGP peers is an internal BGP neighbor relationship, that is, the IBGP (Internal BGP) neighbor relationship; when two BGP peers exchanging routing information When the peers are located in different ASs, the two BGP peers have an extern...

AI Technical Summary

Problems solved by technology

[0003] In the current BGP deployment scenario, the forwarding path of service flows is determined node by hop. If users want to change the forwarding path of traffic, they need to manually configure policies on each node. Manual configuration is time-consuming and laborious, especially in cross-AS domains. In the scenario, it is necessary to configure corresponding policies on many nodes, which will generate a large network maintenance cost and cannot meet the needs of users for intelligent service deployment in the future.

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