958-000290-003, March 2005)

Installing and configuring the Edge Switch 2/3250

Configure preferred ports

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

multiple directors or switches in a fabric. Each participating director or switch must be configured as

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

• The switch domain ID must be set to Insistent. For instructions, refer to ”Configure Switch

Operating Parameters” on page 42.

• Domain IDs range between 1 through 31.

• Source and exit port numbers are limited to the range of ports available on the director or switch

(0 through 23).

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

NOTE: Activating a preferred path can result in receipt of out-of- order frames if the

preferred path differs from the current path, if input and output (I/O) is active from the source

port, and if congestions is present on the current path.

To configure one or more preferred paths for the switch:

1. At the Hardware View, select Configure > Preferred Path. The Configure Preferred Paths dialog

box is displayed (Figure 22).

Figure 22 Configure Preferred Paths dialog box

2. Click Add. The Add Preferred Path dialog box is displayed (Figure 23).

Figure 23 Add Preferred Path dialog box