HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual page 111

Note:
changing this value to something other than the default, refer to sections on principal
switch selection for multi-switch fabrics in the
Planning Guide
Edge Switch 2/24 Product Manager User Guide
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.
— If you have three switches and set all to Default, the switch with the
lowest WWN become 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.
— If you have three switches and set two to Default and one to Never
Principal, the switch with the Default setting and the lowest WWN
becomes the principal switch.
Note that at least one switch in a multi-switch fabric needs to be set as
Principal or Default. If all of the switches are set to Never Principal, all of the
interswitch links (ISLs) will segment. If all but one switch is set to Never
Principal and the switch that was Principal goes offline, then all of the other
ISLs will segment.
We recommend configuring switch priority as Default. If you are considering
for details.
In the Audit Log, you may notice that the Principal setting maps to a number
code of 1, Default maps to a number code of 254, and Never Principal maps to
a number code of 255. The number codes 2-253 are no longer in use.
Interop Mode
Select the interoperability mode for the switch:
— Homogeneous Fabric - Select this mode if the fabric contains only HP
Edge Switches and Directors that are also operating in Homogeneous
Fabric mode.
— Open Fabric 1.0 - Default. Select this mode if the fabric contains HP
Directors and Edge Switches and other open-fabric compliant switches.
Select this mode for managing heterogeneous fabrics.
Configuring the Switch
HP StorageWorks SAN High Availability
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