Cabling a dual-interconnect configuration

Procedures for cabling theThinkAgile CP dual-interconnect switch configuration.

Hardware management network connections (dual-interconnect configuration)

Connect the following ports to the management switch:

Figure 1. Hardware management network connectivity in a dual—interconnect configuration
Diagram of hardware management network connectivity in a dual—interconnect configuration
Note:

If not using the Lenovo ThinkSystem NE0152T RackSwitch as the management switch, you may require different cables for the management network connections.

Compute block connections (dual-interconnect configurations)

The compute block consists of an enclosure with up to four compute nodes, which are numbered as follows:


Image showing the distribution of compute nodes in the compute enclosure

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

Back network port mapping

Network interconnect port

Top left

Compute node 3, port 1 (C.3.1)

Primary interconnect, port 3

Compute node 3, port 2 (C.3.2)

Secondary interconnect, port 3

Top right

Compute node 4, port 1 (C.4.1)

Primary interconnect, port 4

Compute node 4, port 2 (C.4.2)

Secondary interconnect, port 4

Bottom left

Compute node 1, port 1 (C.1.1)

Primary interconnect, port 1

Compute node 1, port 2 (C.1.2)

Secondary interconnect, port 1

Bottom right

Compute node 2, port 1 (C.2.1)

Primary interconnect, port 2

Compute node 2, port 2 (C.2.2)

Secondary interconnect, port 2

Note:

You only need to cable the number of compute nodes that are installed in the compute enclosure.

Figure 2. Dual—interconnect configuration — compute node and network interconnect connections
Diagram of compute node and network connections for dual—interconnect configuration

Storage block connections (dual-interconnect configurations)

Connect the storage controllers according to the populated controller location and corresponding port mapping and interconnect. The cables to be used are clearly labeled; make sure that you use the correct cables.

You need eight Category 6 patch cables and eight SFP+ transceivers. Attach a single SFP+ transceiver to each patch cable.

The storage block port mapping is as follows:

Front storage controller location

Back network port mapping

Network interconnect port

Upper

Upper storage controller, port 1 (S.U.1)

Primary interconnect, port 17

Upper storage controller, port 2 (S.U.2)

Primary interconnect, port 20

Upper storage controller, port 3 (S.U.3)

Secondary interconnect, port 17

Upper storage controller, port 4 (S.U.4)

Secondary interconnect, port 20

Lower

Lower storage controller, port 1 (S.L.1)

Primary interconnect, port 21

Lower storage controller, port 2 (S.L.2)

Primary interconnect, port 24

Lower storage controller, port 3 (S.L.3)

Secondary interconnect, port 21

Lower storage controller, port 4 (S.L.4)

Secondary interconnect, port 24

Figure 3. Dual—interconnect configuration — storage block and network interconnect connections
Diagram of storage block and network connections for redundant interconnect configuration

Peer-link connection (dual-interconnect configuration)

Set up the peer link between the interconnects using the QSFP+ Direct Attach Cables (DACs) that are provided with the configuration.

  1. Connect port 49 on the primary interconnect to port 49 on the secondary interconnect.

  2. Connect port 50 on the primary interconnect to port 50 on the secondary interconnect.

Figure 4. Dual-interconnect configuration — inter-interconnect link network connectivity
Diagram of peer-link connection for redundant interconnect configuration