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FW 07.00.00/HAFM SW 08.06.00 HP StorageWorks Director Element Manager User Guide (AA-RTDUD-TE, March 2005)

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Director Element Manager user guide 95
Configuring fabric parameters
Use procedures in this section to set parameters on the director for fabric operation through the
Configure Fabric Parameters dialog box. These operating parameters are stored in NV-RAM on the
switch.
1. Verify that the director is set offline. For instructions, see ”Set online state” on page 142.
CAUTION: Setting the director offline terminates all Fibre Channel connections.
2. Click Configure > Operating Parameters > Fabric Parameters in the Element Manager window.
The Configure Fabric Parameters dialog box displays, as shown in Figure 33.
Figure 33 Configure Fabric Parameters dialog box
3. Use information in the next section, ”Fabric parameters” on page 95, to change settings as
required for parameters in this dialog box.
4. After you change settings, click Activate.
5. Back up the configuration data when you are finished configuring the director.
6. Set the director online. For instructions, see ”Set online state” on page 142.
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 will
become 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
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).