HP StorageWorks 2.12 Edge Switch - Manual (Page 106)

Configuring the Switch
106 Edge Switch Element Manager User Guide
3. Use information under “ Fabric Parameters ” on page 106 to change settings as
required for parameters in this dialog box.
4. After you change settings, click the Activate button.
Fabric Parameters
Configure the following parameters as required by your fabric.
BB_Credit
(Edge Switch 2/32 only.) Buffer-to-buffer credit. This variable is used to set the
maximum number of frames a port can transmit without receiving a receive ready
signal from the receiving device. Values range from 1 through 60. This value is
used for all ports, except those configured for extended distance buffering
(10-100 km). The default value is 16. For a description of buffer-to-buffer credit,
refer to the industry specification, Fibre Channel Physical and Signaling
Interface.
R_A_TOV
Resource allocation time-out value. This variable is used to time out operations
that depend on the maximum possible time that a frame can be delayed in a fabric
and still be delivered. Adjust the value for R_A_TOV in tenths of a second
(100 ms) increments over a range of 10 tenths (1 second) to 1200 tenths (120
seconds). The default value is 100 tenths (10 seconds).
Note: Set the same value for R_A_TOV on all switches on a multiswitch 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
Error-detect time-out value. This defines the time that the switch waits for an
expected response before declaring an error condition. Configure this value in
tenths of a second (100 ms) increments in a range of 2 tenths of a second to 600
tenths (60 seconds). The default value is 20 tenths (2 seconds).
Note: Set the same value for E_D_TOV on all switches on a multiswitch fabric. If the
value is not the same, the fabric segments.