这样做的目的有两个：一是避免过多的请求“轰炸”云管理器；二是避免流不必要地持续运行循环。

You do this so as to not bombard the cloud manager with requests, and also to not have the flow run a continuous loop unnecessarily.

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管理器实例将IPsec信道交通路由到数据中心，并作为基于云计算的服务器之间的加密交换机。

The manager instances route the IPsec tunnel traffic to the data center and act as encrypted switches between the cloud-based servers.

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