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InfiniBand Network Architecture by MindShare, Inc., Tom Shanley

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SM-Related Protection Mechanisms

Subnet Has One or More SMs

In this section, reference is made to the Master SM and Standby SMs.

At a minimum, a subnet must contain one SM, referred to as the Master SM. It has the responsibility of managing that subnet. A subnet may contain additional SMs, but only one SM may act as the Master SM. The other SMs remain in either the Standby or the Not-Active state.

The chapter entitled, “Multiple SMs” on page 851 provides a detailed description of how a Master SM is chosen from multiple SMs in a subnet.

Management Key (M_Key)

The Problem: Rogue SM Attempts Attribute Access

The Master SM for a subnet is the only SM permitted to manage that subnet. IBA includes a mechanism that enables a device to detect an attribute ...

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