McDATA Sphereon 4300 Specifications download pdf (Page 227)

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Physical Planning Considerations

5-23

Physical Planning Considerations

Preferred Path

The preferred path option allows a user to specify and configure one

or more ISL data paths between multiple directors or fabric switches

in a fabric. At each fabric element, a preferred path consists of a

source port on the director or switch being configured, an exit port on

the director or switch, and the Domain_ID of the destination director

or switch. 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.

• 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.

• For each source port, only one path is defined to each

destination Domain_ID.

Refer to the three-director preferred path illustrated in Figure 5-6.

Figure 5-6 Preferred Path Configuration

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McDATA Sphereon 4300 Specifications Page 227

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