Lenovo ThinkAgile CP Hardware Part Replacement And Component Maintenance Procedures page 147

Compute block connections (dual-interconnect configurations)
The compute block consists of an enclosure with up to four compute nodes, which are numbered as follows:
Connect the compute nodes according to the populated compute node location and the corresponding port
mapping. The cables to be used are clearly labeled; make sure that you use the correct cables.
You need two SFP+ Direct Attach Cables (DACs) for each populated compute node.
The compute block port mapping is as follows:
Front compute node location
Top left
Top right
Bottom left
Bottom right
Note: You only need to cable the number of compute nodes that are installed in the compute enclosure.
Back network port mapping
Compute node 3, port 1 (C.3.1)
Compute node 3, port 2 (C.3.2)
Compute node 4, port 1 (C.4.1)
Compute node 4, port 2 (C.4.2)
Compute node 1, port 1 (C.1.1)
Compute node 1, port 2 (C.1.2)
Compute node 2, port 1 (C.2.1)
Compute node 2, port 2 (C.2.2)
Chapter 5
Network interconnect port
Primary interconnect, port 3
Secondary interconnect, port 3
Primary interconnect, port 4
Secondary interconnect, port 4
Primary interconnect, port 1
Secondary interconnect, port 1
Primary interconnect, port 2
Secondary interconnect, port 2
.
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