EMC Connectrix ED-64M, User Manual

Page: 139 / 476

5
Configuring Operating Parameters
5-11
Configuring the Director
10 through 1200 (tenths of a second, or 1 through 120 seconds). (The
default value is 100 tenths, or 10 seconds.)
Set the same value for R_A_TOV on all directors and switches in 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 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. Set a value in the range 2 through 600
(tenths of a second, or 0.2 through 60 seconds). (The default value is
20
tenths, or 2 seconds.)
EMC recommends leaving the timeout values at their defaults. These are the
defaults used for all HBA and Symmetrix microcode testing for both benign
and fault injection cases.
Switch Priority Every multiswitch fabric contains one principal switch, which assumes
domain address manager functionality, and controls the allocation
and distribution of Domain IDs for all switches in the fabric
(including itself).
The Switch Priority settings for all switches in the fabric determine
the selection of the principal switch. Valid settings are:
◆
Principal
◆
Default
◆
Never Principal
EMC recommends leaving the setting for each director/switch at Default.
A principal switch is selected through negotiation during the Build
Fabric process that follows any of these occurrences:
◆
Multiple directors/switches are interconnected to form a fabric.
◆
A director/switch is removed from the fabric.
◆
A director/switch with Management Style set to Open Systems
and Interop Mode set to McDATA 1.0 is added to the fabric.
(Refer to Configuring the Management Style on page 5-2.)
◆
An ISL is removed.