Intel MPCBL0001 manual Utilities

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.

11.4Utilities

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 from http://sourceforge.net

•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.

Intel NetStructure® MPCBL0001 Technical Product Specification 155