Fabric Switches
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Spine Switches
FIGURE 3: Logical 3-layered architecture topology.
Phase 1: Program or
Pre-design Phase
The program phase establishes the
foundation or the vision for the next
four phases to develop the scope
of work (SOW) content, strategies
and schedules. Furthermore, it is
also the phase that identifies the
ICT cabling infrastructure bill
of materials (BOM) and the
technologies to be commissioned.
The client begins the process by selecting and assembling a commissioning
team. The team’s assignment is to compile the project expectations,
guidelines, and objectives into a formalized owner’s project requirements
(OPR) document. As the project progresses, the ICT consultant contributes
ongoing documentation to the OPR of the CxA or the agent’s team.
The first step in commissioning the ICT cabling infrastructure is for the
ICT consultant to meet with the client’s operations stakeholders. Together,
they conceptualize the logical 3-layered (Figure 3) architecture (lower 3 ISO
layers) inclusive of network, server, and storage requirements.
40G links
Spine Planes
Edge Pods
Server Pods
Rack Switches
Edge Switches
scalable uplinks
scalable uplinks