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FibreXtreme User Guide
PRODUCT OVERVIEW
Copyright 2017
4.4.5 Multiple Master Ring
This is another form of ring topology, where there are multiple masters on the ring, and these
masters have to receive data as well as transmit data to the next master. In the most complex
case, each node is a master, which means that it receives data from the previous master and
sends data to the next master. Flow control is not allowed in this topology for rings above two
nodes, and the data cannot be passed through masters unless control guarantees that there is at
least one source-only node on the ring and that no two masters will transmit at the same time.
Single master rings should temporarily become multiple master rings when switching loop
masters.
Figure 2-7 Multiple Master Ring
4.5 Status Link Up LED
The Link Up LEDs indicate a signal is present on the receiver. These LEDs gives no indication of
the validity of the signal, only that a signal is present. A Link Up LED is present for each
Channel. The Link Up LEDs are on the same side of the board as the transceivers near the front
panel.
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