E_D_Tov; Switch Priority - HP 316095-B21 - StorageWorks Edge Switch 2/24 Installation Manual

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:
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. Also, the value for E_D_TOV
must be less than the value configured for R_A_TOV.

Switch Priority

Setting this value determines the principal switch for the multiswitch fabric.
Choose Principal (highest priority), Default, or Never Principal (lowest
priority) from the Switch Priority drop-down list.
Setting these priority values determines the principal switch selected for the
multiswitch fabric. For example, if you have three switches in the fabric and set
one as Principal, one as Default, and one as Never Principal, the unit set to
Principal becomes the principal switch in the fabric.
If all switches are set to Principal or Default, the switch with the highest priority
and the lowest WWN becomes the principal switch. Following are some examples
of principal switch selection when switches have these settings:
Edge Switch 2/24 Installation Guide
Set the same value for R_A_TOV on all Directors and switches in a multiswitch
Set the same value for E_D_TOV on all switches and Directors in a multiswitch
If you have three switches and set all to Default, the switch with the lowest
WWN becomes the principal switch.
If you have three switches and set two to Principal and one to Default, the
switch with the Principal setting that has the lowest WWN becomes the
principal switch.
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