24 Installation Guide (AA-RTDWE-TE, November 2005)

Table Of Contents

Using HAFM to configure the Edge Switch48

At least one Edge Switch in a multiswitch fabric needs to be set as Principal or Default. If all the

Edge Switches are set to Never Principal, all the interswitch links (ISLs) segment. If all but one Edge

Switch is set to Never Principal and the Edge Switch that was principal goes offline, all the other ISLs

segment.

NOTE: HP recommends that you leave the Edge Switch priority setting as Default. If you are

considering setting this value to something other than Default, see the section on principal switch

selection for multiswitch fabrics in the HP StorageWorks HA-Fabric Manager user guide for details.

For example, 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 of 2--253 are not currently in use.

Interop Mode

Select one of the following options:

• Homogenous 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.

Configuring switch binding

This feature is managed through the Switch Binding submenu options available on the Element

Manager Configure menu. Using switch binding, you can specify devices and Edge Switches that

can attach to Director and Edge Switch ports. This feature provides security in environments that

include a large number of devices by ensuring that only the intended set of devices attach to an

Edge Switch or Director. For complete procedures on configuring this optional feature, see the HP

StorageWorks Edge Switch Element Manager user guide.

Configuring preferred path

The preferred path feature lets you specify and configure one or more ISL data paths between

multiple Directors or Edge Switches in a fabric. Each participating Director or Edge Switch must be

configured as part of a desired path. The following rules apply when configuring a preferred path:

• The Edge Switch domain ID must be set to Insistent. For instructions, see ”Configuring Edge

Switch operating parameters” on page 43.

• Domain IDs range between 1 through 31.

• Source and exit port numbers are limited to the range of ports available on the Edge Switch (0

through 23).

• For each source port, only one path is defined to each destination domain ID.