Silicon Graphics ICE XA, Hardware User'S Manual, Page: 50 / 96

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3: System Overview
Each SGI ICE XA system will have one system administration controller, at least one rack leader
controller (RLC) and at least one service node. All ICE XA systems require one RLC for every
eight CMCs in the system. Figure 3-3 shows an overview of the SGI ICE XA system management
and component network interaction.
ICE XA
System Management
Network
ICE XA
System Computation
Network
InfiniBand Network
GigE Management Network
System Admin Node
One per system
Runs Linux OS
Runs SGI Management Center
Rack Leader Controllers
One per logical rack
Runs Linux OS
Runs IB Fabric Manager
Out-of-Band Software
CMC = Chassis Management Controller
Located in all blade enclosure chassis
Runs IPMI software (eRIC)
BMC = Board Management Controller
Located in:
All compute blades
Admin controller
All Rack Leader Controllers
Runs IPMI software
Compute Blades
Contains the following:
Processors
Memory
Optional PCIe slots and drives
Optional MIC/GPU cards
Each Blade has a BMC
Runs Linux OS
Service Nodes
Login
Batch
Gateway
Optional Lustre Nodes
Storage
Runs Linux OS
Each node has a BMC
In-Band Software
Figure 3-3 SGI ICE XA System and Network Components Overview
The administration server and the RLCs are integrated stand-alone 1U servers. The service nodes
are integrated stand-alone non-blade 1U or 2U servers. The following subsections further define
the free-standing server unit functions described in the previous list.
System Administration Server
There is a minimum of one stand-alone administration controller server and I/O unit per system.
The system administration controller is a non-blade SGI 1U server system (node). Note that a
high-availability administration server configuration is available that doubles the number of