Method and device for realizing multicasting flow load sharing based on equal-cost multi-path (ECMP) routing

Abstract

Disclosed in the present invention are a method and an apparatus for realizing multicasting flow load sharing based on the equal-cost multi-path (ECMP) route. The method comprising the following steps: calculating an ECMP route identification in an obtained current ECMP route table when the ECMP route fails; according to the calculated ECMP identification in the current ECMP route table and the mapping relationship between the current ECMP route table and the global ECMP route table which are synchronized, determining a replacing ECMP route, wherein the global ECMP route table is the current ECMP route table during the system initialization; and transferring the multicasting flow of the failed ECMP route to the replaced ECMP route. By using the method and the apparatus for realizing the multicasting flow load sharing based on the ECMP route, a multicasting service oscillation caused by the failure of ECMP route between devices is avoided.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for realizing multicast traffic load sharing based on equal-cost multipath ECMP. Background technique [0002] Equal Cost Multi-Path (Equal Cost Multi-Path, ECMP path) is a technology to improve the internal gateway routing system based on the shortest path in the network. When there are multiple shortest paths from the source node to the destination node, through a specific algorithm, All data streams are prevented from being forwarded through a fixed path, so as to realize load sharing of unicast services. [0003] refer to figure 1 In the prior art, the upstream and downstream select an ECMP path according to the number of multicast routing entries and ECMP paths using a hash algorithm, so as to realize load sharing of multicast traffic. However, this method has the following defects: when the ECMP path changes, such as the failure of the second ECMP path, the a...

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Problems solved by technology

However, this method has the following defects: when the ECMP path changes, such as the failure of the second ECMP path, the above method will cause the incoming interfaces of all multicast entries to recalculate and distribute the first ECMP path, the second ECMP path and the third ECMP path. multicast traffic on the path, causing all multicast forwarding to flap

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