HP Surestore 64 fw 05.01.00 and sw 07.01.00 - Director Product Manager - User - Page 125
Fabric Parameters, BB_Credit, R_A_TOV
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Configuring the Director Fabric Parameters Configure the following parameters as required by your fabric. BB_Credit Configure the director to support buffer-to-buffer credit (BB_Credit) from 1 through 60. This is the value used for all ports, except those configured for extended distance buffering (10-100 km). The default value is 16. For a description of the buffer-to-buffer credit, refer to the industry specification, Fibre Channel Physical and Signaling Interface. R_A_TOV Configure resource allocation time-out value (R_A_TOV) in tenth-of-a-second increments. This variable works with the error detect time-out value (E_D_TOV) variable to control the director's behavior when an error condition occurs. Resources are allocated to a circuit when errors are detected and are not released for reuse until the time set by the R_A_TOV value expires. The default value is 100 tenths (10 seconds). Set a value between 10 tenths and 1200 tenths (1 through 120 seconds). Note: Set the same value for R_A_TOV on all directors and switches in a multiswitch fabric. If the value is not the same on all units, the fabric segments. Also, the value for R_A_TOV must be greater than the value configured for E_D_TOV. E_D_TOV Adjust the E_D_TOV in tenth-of-a-second increments. An error condition occurs when an expected response is not received within the time limit set by this value. The default value is 20 tenths (2 seconds). Set a value between 2 tenths through 600 tenths (.2 through 60 seconds). Note: Set the same value for E_D_TOV on all switches and directors in a multiswitch fabric. If the value is not the same, the fabric segments. Director Product Manager User Guide 125