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What is IPMI and what is the differences between Radial and Bused IPMI?

April 26, 2017bused differences radial

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What is IPMI and what is the differences between Radial and Bused IPMI?

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IPMI, whish runs on I2C, with several ATAC specific extras, is used for the primary low level shelf management communication channel. In the chassis are two independent (redundant) IPMI interfaces. Normally, a bused IPMI solution is chosen meaning that all slots are connected with redundant, parallel I2C busses. To avoid both busses becoming blocked, IPMI interfaces can be routed in a Dual Star or radial configuration. This configuration connects both interfaces of every slot individually with both shelf managers.