HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual (53-1000240-0 - Page 133

Note: Enter commands in lowercase only; mixed case is for readability. configure 2 level; otherwise, the fabric will be segmented. Note A Brocade Extended Fabrics license is required to set this mode. BB Credit 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 (see Unicast-only Operation). Insistent Domain ID Mode When this mode is set, the switch attempts to acquire from the fabric the domain number programmed in its "Switch Fabric Settings", failing which the switch will segment from the fabric. Virtual Channel Settings The switch enables fine-tuning for a specific application by configuring the parameters for eight virtual channels. The first two virtual channels are reserved for switch internal functions and are not available for modification. The default virtual channel settings have already been optimized for switch performance. Changing the default values can improve switch performance but can also degrade performance. Do not change these settings without fully understanding the effects of the changes. The Virtual Channel Settings are as follows: Table 2-4 Configure Command Virtual Channel Settings Field Default Range VC Priority 2 2 2 to 3 VC Priority 3 2 2 to 3 VC Priority 4 2 2 to 3 VC Priority 5 2 2 to 3 VC Priority 6 3 2 to 3 VC Priority 7 3 2 to 3 VC Priority specifies the class of frame traffic given priority for a virtual channel. F_Port Login Parameters Specify the F_Port login parameters to limit the number of virtual port logins. These are switch-wide parameters applicable to all N_Port ID virtualization (NPIV) ports in the switch. Table 2-5 F_Port Login Parameters Field Type Default Range Maximum logins per switch Number 15*ports 1 to 126*ports Maximum logins per port Number 126 1 to 255 Fabric OS Command Reference Manual Publication Number: 53-1000240-01 2-99