Overview
007-5806-004
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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 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 only in M-Cell rack systems:
•
The cooling rack controller (CRC) assigned to the same logical rack as the CMC
•
The cooling distribution unit (CDU) assigned to the same logical rack as the CMC
Tip:
A logical rack can be one or two physical racks. The number of CMCs in a blade
enclosure pair determines the number of physical racks in a logical rack. If there are two
CMCs in a blade enclosure pair, then one logical rack equals two physical racks. If there are
four CMCs in a blade enclosure pair, then one logical rack equals one physical rack.
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, if there are eight CMCs in one rack then one logical rack
equals one physical rack.
Summary of Contents for ICE X
Page 1: ...SGI ICE X System Hardware User Guide Document Number 007 5806 004 ...
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Page 27: ...Powering the System On and Off 007 5806 004 7 Figure 1 5 Three Phase PDU Examples ...
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Page 78: ...58 007 5806 004 4 Rack Information Figure 4 2 Front Lock on Tall 42U D Rack ...
Page 80: ...60 007 5806 004 4 Rack Information Figure 4 4 Air Cooled D Rack Rear Door and Lock Example ...
Page 84: ...64 007 5806 004 4 Rack Information Figure 4 6 SGI ICE X Multi Cell M Cell Rack Array Example ...
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