Brocade Web Tools Administrator's Guide (53-1000606-01, October 2007)

Web Tools Administrator’s Guide 37
53-1000606-01
Changing system configuration parameters
3
FIGURE 21 Configure tab, Fabric subtab
5. Make the fabric parameter configuration changes.
6. Click Apply.
7. Ena bl e t he s w i tc h as described in “Enabling and disabling a switch” on page 34.
Fabric settings
Configure the following fabric settings on the Fabric subtab of the Configure tab:
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 (2*E_D_TOV) –120000. Values must be multiples of 1000.
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 - (R_A_TOV/2)
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.