Command Constraints ​

MessageLength ​

The maximum message length supported by IPMI IPMB is 254 bytes: 6-byte header + 247-byte body + 1-byte checksum.

The maximum message length supported by IPMI BT is 252 bytes: 4-byte header + 247-byte body + 1-byte checksum.

The maximum message length supported by IPMI LAN (RMCP) and IPMI LAN (RMCP+) is 254 bytes: 6-byte header + 247-byte body + 1-byte checksum.

Performance Specifications ​

Time for processing ipmb messages. 90% of messages are processed within 20 ms, and the timeout interval is 100 ms. (The return is ignored after timeout.)

Reliability Suggestions ​

In the new IPMI command application scenario, if BT communication is involved, it is recommended that the integrity verification field be added to the end of the request and response. The recommended verification algorithm is CRC8.