24 Installation Guide (AA-RTDWC-TE, July 2004)

Installing and Configuring the Edge Switch 2/24

75Edge Switch 2/24 Installation Guide

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 67.

■ 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. Ensure that the preferred path PFE key is installed and configured. For

instructions, refer to “Configure Feature Key” on page 88.

2. At the Hardware View, choose Configure > Preferred Path. The Configure

Preferred Paths dialog box displays (Figure 20).

Figure 20: Configure Preferred Paths dialog box