Technical Product Specification

Intel® Local Control Panel TPS IPMB Application and Sensor Definition
Revision 1.2
Intel order number C96442-003
13
4. IPMB Application and Sensor Definition
This section presents the additional specification information required for the Intel
®
Local Control
Panel‟s implementation as an IPMI controller. See the Intelligent Platform Management
Specification 2.0 for more information.
4.1 LUNs
The Intel
®
Local Control Panel accepts Intelligent Platform Management Bus requests directed
to its LUN (Logical Unit Number). Even though the Intel
®
Local Control Panel accepts only
commands to LUN00, any LUN can be used in the Requester‟s address. The Intel
®
Local
Control Panel does not have restrictions on the LUNs used to send requests or responses to
other controllers.
4.2 Incrementing the Sequence Field
The Intel
®
Local Control Panel increments the sequence field whenever it transmits a new
request on the IPMB. To increase the reliability of message transmission the Intel
®
Local Control
Panel will resend individual bytes within a message as necessary. Five retries (for total of six
transmission attempts) are used to get a good confirmation. If there is no appropriate ACK
signal from the target after these attempts the Intel
®
Local Control Panel will note an incomplete
transmission and return to an idle state. There is no automated resend function at the full
message level.