
Overview
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Communication Hierarchy
Communication within the overall management framework is as follows:
Admin Node
The Admin node communicates with the following:
•
All rack leader controllers (RLCs)
•
All cooling rack controllers (CRCs)
•
All optional cooling distribution units (CDUs)
Rack Leader Controller (RLC)
The RLCs within a “logical rack” (see tip that follows) communicate with the following:
•
All chassis management controllers (CMCs) within the same logical rack as the RLC.
Chassis Management Controllers
The CMCs within a logical rack communicate with the following:
•
The rack leader controllers (RLCs) within the same logical rack
The following two components communicate with CMCs in E-Cell rack systems:
•
The cooling rack controller (CRC) is assigned to the same logical rack as the CMCs
•
The cooling distribution unit (CDU) is assigned to the same logical rack (and VLAN) as the
CMCs
Tip:
A logical rack can be one or two physical racks. The logical rack is based on the RLC.
There is one RLC in each logical rack. An RLC supports a maximum of eight CMCs.
Therefore, one logical rack of enclosures can occupy two physical racks.
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