Figure 15.4: Path discovery sketch map
detect whether it can arrive to the destination facility. The idiographic processes as follow: MEP
sending the one way broadcast message (LBM), the destination address of the message is the
outlying MP. Once the middle facility receive the LBM will then transmit, and the outlying MP will
sending the replay message (LBR) to the source MEP after it receive the LBM. The source MEP
can accord this to determine whether the outlying MP can arrive or not. As shown in the following
Figure 15.5.
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General