HP StorageWorks 2/16V Brocade Web Tools Administrator's Guide - Supporting Fab - Page 62

BB Credit, R_A_TOV, Suppress Class F Traffic

Page 62 highlights

3 Changing system configuration parameters • BB Credit The buffer-to-buffer credit is the number of buffers available to attached devices for frame receipt. The default BB Credit is 16. The range is 1-27. • R_A_TOV Resource allocation timeout value (in milliseconds). This variable works with the E_D_TOV to determine switch actions when presented with an error condition. The default is 10000. The possible range is 4000-120000. • E_D_TOV Error detect timeout value (in milliseconds). This timer is used to flag a potential error condition when an expected response is not received within the set time. The valid range is 1000-5000. • Datafield size The largest possible data field size (in bytes). The valid range is 256-2112. • Switch PID Format Select a switch PID format from one of the following: - Format 1 (0-base, 256 encoding) - Format 2 (16-base, 256 encoding) • 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 Choose 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 40 Web Tools Administrator's Guide Publication Number: 53-1000435-01

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40
Web Tools Administrator’s Guide
Publication Number: 53-1000435-01
Changing system configuration parameters
3
BB Credit
The buffer-to-buffer credit is the number of buffers available to attached devices for frame
receipt. The default BB Credit is 16. The range is 1–27.
R_A_TOV
Resource allocation timeout value (in milliseconds). This variable works with the E_D_TOV to
determine switch actions when presented with an error condition. The default is 10000. The
possible range is 4000–120000.
E_D_TOV
Error detect timeout value (in milliseconds). This timer is used to flag a potential error condition
when an expected response is not received within the set time. The valid range is 1000–5000.
Datafield size
The largest possible data field size (in bytes). The valid range is 256–2112.
Switch PID Format
Select a switch PID format from one of the following:
-
Format 1 (0-base, 256 encoding)
-
Format 2 (16-base, 256 encoding)
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
Choose 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