Role Of Integrated Bmc In Nm - Intel S1200BTS Specification

Platform Management
Task
and Thermal Policy
Limit power upon power excursion (OS operational)
Reduce power upon temperature excursion
Limit power even when OS is not operational (OS failure)
Reduce power consumption to prevent tripping DC circuit breaker
Avoid Triggering
Power supply optimization technologies (SmaRT & CLST) used to
HW Protection
limit power consumption to reduce demand on power supplies in
specific scenarios.
IPMI-based commands over SMBus (monitoring, control & alert)
PECI Proxy and Pass-Through (this feature is also available on the
ME Si-Enabling firmware)
Interfaces
Power telemetry from Integrated BMC or from PMBus-compliant
power supplies
Note: EPSD systems have ME get power data directly from power
supplies
4.4.3

Role of Integrated BMC in NM

This section summarizes the Integrated BMC role in the NM feature implementation.
4.4.3.1 External Communications Link
The Integrated BMC provides the access point for remote commands from external
management software and generates alerts to that software. The ME plays the role of an IPMI
satellite controller that communicates to the Integrated BMC over a secondary IPMB. There are
mechanisms to forward commands to ME and send response back to originator. Similarly
events generated by ME to the Integrated BMC (via IPMB) have to be sent by the Integrated
BMC to the external software over the LAN link. It is the responsibility of Integrated BMC to
implement these mechanisms for communication with Node Manager (NM).
4.4.3.1.1 Command Passing Via Integrated BMC
External software wishing to communicate with the NM will send ‗bridged' IPMI commands to
Integrated BMC. This will be in the form an IPMI packet encapsulated in another packet,
following standard IPMI bridging as described in the IPMI 2.0 Specification. Integrated BMC
forwards the encapsulated command it to NM engine on the ME and returns the response to
the sender.
Due to the fact that some of the NM commands have potential for performance limiting and
system shut-down, the Integrated BMC firmware enforce an administrator privilege for any
commands bridged to the ME.
4.4.3.1.2 Alerting
Alerts may be sent from the NM in the ME to the external software by one of two different
methods depending on the nature of the alert.
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Capabilities & Features
Intel order number G13326-003
Intel® Server Board S1200BT TPS
2.0
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Revision 1.0