director 2/64 installation guide

3–14 director 2/64 installation guide

Using EWS to Configure the Director 2/64

If all directors are set to Principal or Default, the director with the highest priority

and the lowest WWN becomes the principal director. Following are some examples of

principal director selection when directors have these settings:

• If you have three directors and set all to Default, the director with the lowest

WWN becomes the principal director.

• If you have three directors and set two to Principal and one to Default, the

director with the Principal setting that has the lowest WWN becomes the

principal director.

• If you have three directors and set two to Default and one to Never Principal, the

director with the Default setting and the lowest WWN becomes the principal

director.

At least one director in a multiswitch fabric needs to be set as Principal or Default. If

all of the directors are set to Never Principal, all of the interswitch links (ISLs) will

segment. If all but one director is set to Never Principal and the director 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 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

Select one of the following options:

• Homogeneous Fabric—Select this mode if the fabric contains only HP directors

and edge switches that are operating in Homogeneous Fabric mode.

• Open Fabric 1.0—Default. Select this mode if the fabric contains HP directors

and edge switches, as well as other open-fabric compliant switches. Select this

mode for managing heterogeneous fabrics.