4 utilities, Utilities – Intel NetStructure MPCBL0001 User Manual
Page 155
Intel NetStructure
®
MPCBL0001 Technical Product Specification
155
Serial Over Lan (SOL)
The maximum baud rate supported by the IPMC for SOL is 115.2 kbps. There will be a minimal
improvement between the baud rate of 19.2kbps to 115.2kbps. This is due to a combination of all
the software overhead of creating/breaking down IP packets in the IPMC as well as a slower link
between the IPMC and the NIC (I2C).
If a user configures the SOL configuration without modifying the reference_cfg file, the default
baud rate is 9.6 kbps.
Note:
The BIOS default baud rate is 9.6 kbps, so if SOL is configured for a different baud rate, the BIOS
output will not be seen using the SOL client until the BIOS baud rate is set to match the SOL client
baud rate.
11.4
Utilities
The SOL client establishes an IPMI-over-LAN connection with the IPMC on the blade. It then
activates SOL, which effectively switches the board hardware to redirect serial traffic to the IPMC
instead of the serial port. Any outbound characters from the UART now are packetized by the
IPMC and sent over the network to the SOL client via the TCO port. Conversely, any input on the
SOL client is packetized by the client and sent over the network to the IPMC, which is responsible
for conveying it to the UART.
SOL data is carried over the network in UDP datagrams. IPMI 2.0 defines the specification of
packet formats and protocols for SOL. As per the IPMI 2.0 specification, RMCP+ is the packet
format when the Payload Type is set to “SOL”. Authentication, integrity, and encryption for SOL
are part of the RMCP+ specification.
Two utilities are provided to support configuring the SOL capability on the MPCBL0001 SBC
blade. .
•
ipmitool – an SOL client utility (must be version 1.8.7 or above). This tool can be downloaded
fro
•
reference_cfg – a SOL configuration reference script.
•
reference_func - a library function file for reference_cfg
The SOL configuration reference script (reference_cfg) sends a sequence of IPMI commands to
configure an SBC to enable the SOL feature. This script can be executed on a payload CPU for
local configuration, or on a node that has network connectivity to the target SBC. Without this
IPMC configuration, the SOL client utility will not be able to communicate with the SBC. This
script is provided to customers as an example of a semi-automated method to configure systems
and is not meant for use in production environments.
The ipmitool utility enables a user to establish a RMCP+ session with a SBC’s management
controller and activate two-way SOL packet communication.
It is important to note that while ipmitool is a supported utility, reference_cfg is provided as an
unsupported reference to be modified at will by customers to suit their specific environments and
integration needs.