Silicon Graphics Origin 3900 User Manual page 130

8: System Control
104
The controllers communicate with each other in the following ways:
• An L1 controller of an I/O brick (for example, IX-, PX-, X-, N-, or V-brick)
communicates with an L2 controller via a Cx-brick.
• An L1 controller of a Cx-brick can communicate with the L2 controller in the
following ways:
• Via the L1 port directly or via the L1 port and a USB hub.
• Via Port F; this port connects to a Cx-brick that connects to the L2 controller.
• An L1 controller of a G-brick communicates with the L2 controller via the L1 port
and a USB hub.
• An L1 controller of an R-brick communicates with the L2 controller directly or via a
USB hub.
• An L2 controller communicates with other L2 controllers via an Ethernet hub.
Figure 8-1 illustrates the connections between the L1 and L2 controllers.
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