Silicon Graphics Origin 3900 User Manual page 86

3: Cx-brick
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The Cx-brick has the following rear-panel items (see Figure 3-4):
• Four NUMAlink connectors connect the Cx-brick to other Cx-bricks and/or
R-bricks. NUMAlink 6 (port F) and NUMAlink 1 (port A) connect to another
Cx-brick. NUMAlink 7 (port G) and NUMAlink 8 (port H) connect to R-bricks.
Note: For a system that contains four Cx-bricks, all four NUMAlink ports connect to
Cx-bricks.
Each NUMAlink connector has two LEDs: one LED illuminates yellow to indicate
that the Cx-brick and the brick to which it is connected are powered on and the
other LED illuminates green to indicate that the link is established between the
Cx-brick and the brick to which it is connected.
• Four XIO connectors can connect the Cx-brick to IX-, PX-, and/or X-bricks. The XIO
connector numbers indicate the IP53 node board to which it connects; for example,
XIO0 connects to IP53 node board 0. XIO1 connects to IP53 node board 1, and so on.
Each XIO connector has two LEDs: one LED illuminates yellow to indicate that the
IP53 node board and the brick to which it is connected are powered on and the
other LED illuminates green to indicate that the link is established between the IP53
node board and the I/O brick to which it is connected.
• One power connector connects the Cx-brick to a power bay via a DC power cable.
• One power switch powers on the L1 controller when moved to the
moving it to the position powers off the L1 controller.
0
• One L1 port connects the Cx-brick's L1 controller to the L2 controller.
• One Console port connects the Cx-brick's L1 controller to a system console.
• Sixteen heartbeat LEDs: each IP53 node board has four LEDs that indicate
processor activity. (For example, N0 A is the LED for processor A of IP53 node board
0.)
• Four INT LINK LEDs indicate that the connections between the four Bedrock
ASICs and the router board are okay. (For example, INT LINK 0 is the LED for the
connection between the Bedrock ASIC on IP53 node board 0 and the router board.)
• Eight Power OK LEDs:
• One LED for 12-V power illuminates green when the power switch is in the On
( ) position and the power bay supplies 12 VDC to the brick.
1
• One LED for 48-V power illuminates green when the power bay supplies
48 VDC to the brick at the request of the L1 controller.
position;
1
007-4653-001