HP StorageWorks Edge Switch 2/16 Manual do Utilizador descarregar pdf (Página 97)

edge switch 2/16 product manager user guide 3–5

Configuring the Switch

Adjust the E_D_TOV in one-tenth-second increments. An error condition occurs

when an expected response is not received within the time limit set by this value.

The default value is 20 tenths (2 seconds). Set a value between 2 tenths through

600 tenths (.2 through 60 seconds).

NOTE: Set the same value for E_D_TOV on all switches on a multiswitch fabric. If the value is

not the same, the fabric segments.

•Preferred Domain ID

Use this field to set each switch in the fabric to a unique preferred domain ID.

Fibre Channel addresses in the switch include this preferred domain ID, which

creates a unique identification for the port in the fabric. The default value is 1. Set

a preferred value from 1 through 31.

The preferred domain ID must be unique for each switch in a fabric. If two

switches have the same preferred domain ID, the E_Ports segment, causing the

fabric to segment.

NOTE: For more information on the domain ID, refer to the section on domain ID assignment

for multiswitch fabrics in the

hp StorageWorks product in a SAN environment: planning

guide for director 2/64, edge switch 2/16, and edge switch 2/32

(A6534-96025/AA-RS2DA-TE).

• Switch Priority

Setting this value determines the principal switch for the multiswitch fabric.

Select either Principal (highest priority), Default, or Never Principal (lowest

priority) from the Switch Priority drop-down list.

If all switches are set to Principal or Default, the switch with the highest priority

and the lowest WWN becomes the principal switch. Following are some examples

of principal switch selection when switches have these settings.

• If you have three switches and set all to Default, the switch with the lowest

WWN become the principal switch.

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

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

principal switch.

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

the switch with the Default setting and the lowest WWN becomes the

principal switch.

Note that at least one switch in a multiswitch fabric needs to be set as Principal or

Default. If all of the switches are set to Never Principal, all of the interswitch links

(ISLs) will segment. If all but one switch is set to Never Principal and the switch

that was Principal goes offline, then all of the other ISLs will segment.

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HP StorageWorks Edge Switch 2/16 Manual do Utilizador Página 97