Cambium Networks PTP 820S, Техническое описание, Страница: 121 / 208

Chapter 4: Feature Description Ethernet Features
Once a signal failure is detected, the RPL is unblocked for each ERPI. As shown in the following
figure, the ring switches to protecting state. The nodes that detect the failure send periodic SF
messages to alert the other nodes in the link of the failure and initiate the protecting state.
Figure 67 G.8032 Ring in Protecting State
The ability to define multiple ERPIs and assign them to different Ethernet services or groups of
services enables operators to perform load balancing by configuring a different RPL for each ERPI.
The following figure illustrates a ring in which four ERPIs each carry services with 33% capacity in
idle state, since each link is designated the RPL, and is therefore idle, for a different ERPI.
Figure 68 Load Balancing Example in G.8032 Ring
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