Method and apparatus for message forwarding

Abstract

This invention discloses a method and an apparatus for message forwarding and is applicable to IP packet network. The method comprises the following steps of: a compulsive or suggestive preferred outbound interface being set for a message by router equipment according to the business requirement of present business application; while forwarding the message via the router device, if a compulsive preferred outbound interface is judged to be set for the message, inquiring a forwarding list according to the target IP address of the message, and if the outbound interfaces corresponding to target IP address contain the compulsive preferred interface according to the inquiring, then forwarding the message according to the inquired outbound interface, otherwise, giving up the forwarding of the message; if the suggestive preferred outbound interface is judged to be set for the message, inquiring the forwarding list according to the target IP address of the message, and if the outbound interfaces corresponding to target IP address contain the suggestive preferred interface according to the inquiring, forwarding the message according to the inquired outbound interface; otherwise, forwarding the message according to default route forwarding strategies. By employing this invention, the flexibility and scalability of the equivalent routing load sharing mechanism can be improved.

Description

technical field [0001] The invention relates to the field of communication technologies, in particular to a message forwarding method and device thereof. Background technique [0002] Equal-cost routing means that there are multiple valid next hops pointing to the same prefix in the same system, which can be used to forward the traffic going to the address covered by the prefix separately, so as to achieve the purpose of effectively using network resources. [0003] Generally, no matter which next hop the traffic is forwarded from, it can reach the target device. Load sharing occurs at the third layer, and the route selection process for packets is transparent to upper-layer services. However, in certain cases, certain restrictions must be imposed on traffic load sharing, otherwise traffic distribution will be unreasonable, and even services will be unavailable. For such problems caused by networking and business cooperation, it can be called "equivalent routing application...

AI Technical Summary

Problems solved by technology

[0015] (1) The business saves the forwarding and encapsulation information by itself, which has poor flexibility and cannot make full use of the support provided by the forwarding infrastructure (including forwarding tables, adjacency tables and other entries and forwarding strategies based on this); when there are multiple link types In the case of self-processing, its scalability is not enough

In addition, for systems that require hardware support, due to the special requirements of certain services, the forwarding path of their traffic may be inconsistent with the forwarding paths of other business traffic. maintenance, expensive

[0016] (2) Due to the introduction of policy routing in the solution of forwarding and related services, the complexity of the solution is increased, and the configuration workload of the user is also increased, and it is difficult for products in the form of hardware forwarding to support flexible and changeable forwarding policy settings , making it difficult to use hardware to accelerate the processing of such services

[0017] In addition, for solutions in bandwidth optimization scenarios, the self-organized forwarding process is not abstract enough, and it does not cooperate effectively with other services, such as NAT. Isolated load sharing may affect the timeliness of NAT services. For example, there is no reverse traffic The inbound interface forwards, and sends out from the interface calculated according to the bandwidth, thus causing the above problem (1)

[0018] It can be seen that the existing equal-cost routing load sharing mechanism has poor flexibility, poor scalability, and cannot well support the performance of different systems.

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