HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS V3.1.x/4.1.x Reference Guide - Page 152

Fabric OS Commands Table 2: Configure Command Fabric Parameters (Continued) Field VC Encoded Address Mode Core Switch PID Format (V3.1.x only) Per-frame Route Priority Long Distance Fabric Default 0 0 0 0 0 or 1 0 or 1 0 or 1 0 or 1 Range Descriptions of the switch fabric setting fields are as follows: Domain BB Credit R_A_TOV E_D_TOV Data Field Size The domain number uniquely identifies the switch in a fabric. This value is automatically assigned by the fabric. The range of valid values varies depending on the switch model and other system parameter settings (see VC Encoded Address Mode). The buffer-to-buffer (BB) credit represents the number of buffers available to attached devices for frame receipt. The range of allowed values varies depending on other system settings. The Resource Allocation Time Out Value (R_A_TOV) is displayed in milliseconds. This variable works with the variable E_D_TOV to determine switch actions when presented with an error condition. Allocated circuit resources with detected errors are not released until the time value has expired. If the condition is resolved prior to the time out, the internal time out clock resets and waits for the next error condition. Error Detect Time Out Value (E_D_TOV) is displayed in milliseconds. This timer is used to flag a potential error condition when an expected response is not received (an acknowledgment or reply in response to packet receipt, for example) within the set time limit. If the time for an expected response exceeds the set value, then an error condition occurs. The data field size specifies the largest possible value, in bytes, and advertises this value to other switches in the fabric during construction of the fabric as well as to other devices when they connect to the fabric. Setting this to a value smaller than 2112 may result in decreased performance. 152 Fabric OS Version 3.1.x/4.1.x Reference Guide