InfiniBand Network Architecture

The QP State Machine

Figure 12-1 on page 235 illustrates the QP state machine. Note the following:

• The solid arrow lines indicate state changes that can be caused by software using the Modify QP verb.

• The dotted arrow lines indicate automatic state changes that occur upon detection of an error.

• Using the Modify QP verb, software may command the QP to enter the Reset state from any other state. The figure does not show this, but it is stated in figure note 2.

• Using the Modify QP verb, software may command the QP to enter the Error state from any other state. The figure does not show this, but it is stated in figure note 3.

Figure 12-1. The QP State Machine

The possible states that a QP may be in at any given time are:

• Reset. The basic QP has been ...