edge switch 2/32 product manager user guide

edge switch 2/32 product manager user guide 3–9
Configuring the Switch
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 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.
• 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.
At least one Switch in a multiswitch 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.
NOTE: We recommend you leave the Switch priority setting as Default. If you are considering
setting this value to something other than the default, refer to the section on principal Switch
selection for multiSwitch fabrics in the hp StorageWorks SAN high availability planning guide for
details.
In, for example, 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 of 2 - 253 are not currently in use.
Interop Mode
Choose the following option:
• Open Fabric 1.0. Choose this mode if the fabric contains HP Directors and
Switches, as well as other open-fabric compliant Switches. Choose this mode for
managing heterogeneous fabrics.