假定出现了某个网络问题，例如，靠近设备的路由器出错，或一组设备出错。

Suppose that some network issue emerges-a router close to the devices fails or a cluster of devices fails.

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组播技术的核心是选路问题，设计或选取合适的组播路由算法对组播选路的有效实施非常重要。

The core of multicast mechanism is routing problem, and designing & selecting appropriate multicast routing algorithm is very important to efficiently implement multicast routing.

youdao

多点到多点组播路由是组播研究领域内的一个重要问题。

Many-to-many multicast routing is an important problem in multicast research fields.

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