To IXP1200 Network Processor, receiving packet and transmitting packet are finished by Receive State Machine and transmit State Machine in IX bus separately.
在微引擎中的包的接收和转发是通过利用IX总线接口单元的接收状态机和转发状态机来完成的。
If a client using your state machine service calls the wrong operation for the current state, the client will receive a fault to let it know what happened.
如果使用状态机服务的客户端为当前状态调用了错误的操作，则该客户端将接收一个错误，使其知道将发生什么情况。
Specifically, if your BPEL implementation requires more than one Receive activity, and you start defining correlation sets, then seriously consider a state machine implementation.
具体而言，如果您的 BPEL 实现需要多个 Receive 活动，且您开始定义相关集，则有必要考虑状态机实现。
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