7. IPU-POD₁₂₈ installation

An IPU‑POD₁₂₈ system consists of two IPU‑POD₆₄ logical racks with GW-Link cables connected between them via a GW-Link switch. Table 7.1 shows the BOM for an IPU‑POD₁₂₈, giving you options for either electrical (copper) or optical Ethernet cables for the GW-Links, depending on your datacentre layout - copper cables are suitable for racks that are adjacent, and optical cables for racks that are further apart.

Table 7.1 BOM for an IPU‑POD₁₂₈

Item	Product number	Description	Quantity
1	900-0020	IPU-POD64 Logical Rack	2
2	Arista DCS-7060PX4-32-F	GW-Link Switch	1
3		Spline switch	1
4	MCP1600-C01AE30N	1.5m Direct Attach Ethernet 100GbE QSFP28 Passive Copper Cable for GW-Link (not needed if [5] & [6] are used)	32
5	SM-ULC-DX-PVC-1.5M	1.5m LC UPC to LC UPC Duplex OS2 Optical Cable for GW-Link (not needed if [4] is used)	32
6	TR-ZC13H-N00	100Gb/s QSFP28 DR Single Lambda Optical Transceiver for GW-Link (not needed if [4] is used)	64
7	CT8R02R-CDC25-DF	1.5m Cat5e Ethernet Cable for 10GbE Switch Redundancy	2

Fig. 7.1 shows the IPU‑POD₁₂₈ layout and switched GW-Link cables between the two IPU‑POD₆₄ racks.

Fig. 7.1 IPU‑POD₁₂₈ topology with switched GW-links

Fig. 7.2 shows the location of the GW-Link ports on the front of each IPU-M2000.

Fig. 7.2 IPU-M2000 front panel showing GW-Link ports