Dell Brocade 6520 Web Tools Administrator's Guide Supporting Fabric OS v7.1.0 - Page 69

System configuration parameters 3 Datafield size The largest possible data field size (in bytes). The range of valid values is from 256 through 2112. Address mode Displays the addressing mode present in the switch. Sequence Level Switching Select this box to enable frames of the same sequence from a particular group to be transmitted together. When this option is not selected, frames are transmitted interleaved among multiple sequences. Under normal circumstances, sequence-level switching should be disabled for better performance. However, some host adapters have issues when receiving interleaved frames among multiple sequences. Disable Device Probing Set this mode only if the switch N_Port discovery process (PLOGI, PRLI, INQUIRY) causes an attached device to fail. When set, devices that do not register with the Name Server are not present in the Name Server database. Per-Frame Routing Priority Select whether to select per-frame routing priority. When enabled, the virtual channel ID is used in conjunction with a frame header to form the final virtual channel ID. Suppress Class F Traffic Applies only if VC-encoded address mode is also set. When selected, translative addressing (which allows private devices to communicate with public devices) is disabled. Insistent Domain ID Mode Set this mode to make the current domain ID insistent across reboots, power cycles, and failovers. This mode is required fabric wide to transmit FICON data. WWN-based Persistent Set this mode to configure a PID persistently using a device's WWN. When the device logs PID into the switch, the PID is bound to the device WWN. Refer to "WWN-based Persistent PID assignment" on page 39. Enabling insistent domain ID mode To enable insistent domain ID mode, perform the following steps. 1. Open the Switch Administration window as described in "Opening the Switch Administration window" on page 31. 2. Disable the switch as described in "Enabling and disabling a switch" on page 35. 3. Select the Configure tab. 4. Select the Fabric subtab. 5. Select the Insistent Domain ID Mode check box. 6. Click Apply. 7. Enable the switch as described in "Enabling and disabling a switch" on page 35. Configuring virtual channel settings You can configure parameters for eight virtual channels (VC) to enable fine-tuning for a specific application. You cannot modify the first two virtual channels because these are reserved for switch internal functions. ATTENTION The default virtual channel settings are already 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. VC Priority specifies the class of frame traffic given priority for a virtual channel. To configure the virtual channel settings, perform the following steps. Web Tools Administrator's Guide 41 53-1002756-01