PCIe switch board cable routing

Use the section to understand the cable routing for the PCIe switch board.

Based on the location, select the corresponding routing plan:

In 2U compute shuttle

Signal cables

Cable	From	To
`1`	Rear switch cable harness: PCIe 8 cable	System board assembly: PCIe connector 8
`2`	Rear switch cable harness: PCIe 7 cable	System board assembly: PCIe connector 7
`3`	Rear switch cable harness: PCIe 5 cable	System board assembly: PCIe connector 5
`4`	Rear switch cable harness: PCIe 6 cable	System board assembly: PCIe connector 6
`5`	Rear switch cable harness: PCIe 4 cable	System board assembly: PCIe connector 4
`6`	Rear switch cable harness: PCIe 3 cable	System board assembly: PCIe connector 3
`7`	Rear switch cable harness: PCIe 1 cable	System board assembly: PCIe connector 1
`8`	Rear switch cable harness: PCIe 2 cable	System board assembly: PCIe connector 2

GPU management cable

Note

Make sure to route the cable through the cable guide as instructed.

Figure 1. PCIe switch board cable routing (GPU management cable)

Cable	From	To
`1`	PCIe switch board: GPU management cable	System board assembly: PCIe SW MGMT connector

Signal cables

Cable	From	To	Label
`1`	Front PCIe switch cable harness: MCIO 1 cable	PCIe switch board: MCIO connector 1 (MCIO1)	MCIO 1
`2`	Front PCIe switch cable harness: MCIO 2 cable	PCIe switch board: MCIO connector 2 (MCIO2)	MCIO 2
`3`	Front PCIe switch cable harness: MCIO 3 cable	PCIe switch board: MCIO connector 3 (MCIO3)	MCIO 3
`4`	Front PCIe switch cable harness: MCIO 4 cable	PCIe switch board: MCIO connector 4 (MCIO4)	MCIO 4
`5`	Front PCIe switch cable harness: MCIO 5 cable	PCIe switch board: MCIO connector 5 (MCIO5)	MCIO 5
`6`	Front PCIe switch cable harness: MCIO 6 cable	PCIe switch board: MCIO connector 6 (MCIO6)	MCIO 6
`7`	Front PCIe switch cable harness: MCIO 7 cable	PCIe switch board: MCIO connector 7 (MCIO7)	MCIO 7
`8`	Front PCIe switch cable harness: MCIO 8 cable	PCIe switch board: MCIO connector 8 (MCIO8)	MCIO 8

After you finish

Divide the cables connected to the PCIe switch board into four bundles, and secure them with cable ties.

Bundle	Cable
`1`	Two backplane 1 signal cables (connected to NVMe connectors 1 and 2) Two PCIe switch board signal cables (connected to MCIO connectors 1 and 2)
`2`	Two backplane 1 signal cables (connected to NVMe connectors 3 and 4) Two PCIe switch board signal cables (connected to MCIO connectors 3 and 4)
`3`	Two backplane 2 signal cables (connected to NVMe connectors 5 and 6) Two PCIe switch board signal cables (connected to MCIO connectors 5 and 6)
`4`	Two backplane 2 signal cables (connected to NVMe connectors 7 and 8) Two PCIe switch board signal cables (connected to MCIO connectors 7 and 8)

Figure 2. Securing cables with cable ties

GPU management cable

Figure 3. PCIe switch board cable routing (GPU management cable)

Cable	From	To
`1`	Front PCIe switch cable harness: GPU management cable	PCIe switch board: GPU management connector (MGMT)

Power and sideband cables

Note

Make sure to route the cables through the cable clips as instructed.

Figure 4. PCIe switch board cable routing (power and sideband cables)

Cable	From	To
`1`	PCIe switch board: Power distribution board power connector 1 (PDB PWR1)	Power distribution board: PCIe switch board power connector 1 (FRONT RISER PWR1)
`2`	PCIe switch board: Power distribution board sideband connector 1 (PDB SB1)	Power distribution board: PCIe switch board sideband connector 1 (SWSB1)
`3`	PCIe switch board: Power distribution board power connector 2 (PDB PWR2)	Power distribution board: PCIe switch board power connector 2 (FRONT RISER PWR2)
`4`	PCIe switch board: Power distribution board sideband connector 2 (PDB SB2)	Power distribution board: PCIe switch board sideband connector 2 (SWSB2)

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