Bb_Credit; R_A_Tov; E_D_Tov; Switch Priority - HP StorageWorks Director 2/140 Installation Manual

BB_Credit

Configure the director to support buffer-to-buffer credit (BB_Credit) from 1
through 60. This is the value used for all ports, except those configured for
extended distance buffering (10-100 km). The default value is 16. For a
description of the buffer-to-buffer credit, refer to the industry specification, Fibre
Channel Physical and Signaling Interface.

R_A_TOV

Configure resource allocation time-out value (R_A_TOV) in tenth-of-a-second
increments. This variable works with the error detect time-out value (E_D_TOV)
variable to control the director's behavior when an error condition occurs.
Resources are allocated to a circuit when errors are detected and are not released
for reuse until the time set by the R_A_TOV value expires. The default value is
100 tenths (10 seconds). Set a value between 10 tenths and 1200 tenths (1 through
120 seconds).
Note:
multi-switch fabric. If the value is not the same on all units, the fabric segments. Also,
the value for R_A_TOV must be greater than the value configured for E_D_TOV.

E_D_TOV

Adjust the E_D_TOV in tenth-of-a-second increments. An error condition occurs
when an expected response is not received within the time limit set by this value.
The default value is 20 tenths (2 seconds). Set a value between 2 tenths through
600 tenths (.2 through 60 seconds).
Note:
fabric. If the value is not the same, the fabric segments.

Switch Priority

Setting this value determines the principal director for the multi-switch fabric.
Choose Principal (highest priority), Default, or Never Principal (lowest priority)
from the Switch Priority drop-down list.
Director 2/140 Installation Guide
Set the same value for R_A_TOV on all directors and edge switches in a
Set the same value for E_D_TOV on all switches and directors in a multi-switch
Installing and Configuring the Director
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