IBM SAN32M1, Инструкция по установке и обслуживанию

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SAN32M1 Fabric Switch Installation and Service Manual 130
Preferred
NOTE:
To change this value, you must first set the switch offline. Select Set
Online State from the Maintenance menu to display the Set Online State dialog
box, then click the Set Offline button. Be sure to set the switch back online
after you change this value.
Use this field to set the a unique domain ID for the switch. The
default value is 1. Set a value between 1 and 31. When a switch comes
online with a preferred ID, it requests an ID from the fabric’s
principal switch (indicating its preferred value as part of the request).
If the requested domain ID is not allocated to the fabric, the domain
ID is assigned to the requesting switch. If the requested domain ID is
already allocated, an unused domain ID is assigned. Note that you
must set the switch offline before you can change to the preferred
domain ID.
The preferred domain ID must be unique for each director and switch
in a fabric. If two switches or directors have the same preferred
domain ID, the E_Ports segment, causing the fabric to segment.
Insistent
Click the check box to remove or add a check mark. The default state
is disabled (no check mark).
When a checkmark displays, the domain ID configured in the
Preferred Domain ID field will become the active domain identification
when the fabric initializes. See the following notes:
• This option is required if Enterprise Fabric Mode (optional
SANtegrity feature) is enabled.
• If you enable Insistent Domain while the switch or director is
online, the Preferred Domain ID will change to the current active
domain ID if the IDs are different.
If a switch with a duplicate domain ID exists in the fabric, both
switches’ E_Ports will segment when they try to join.
Rerouting delay
Placing a check mark in the check box to the left of the Rerouting Delay
option enables rerouting delay. This option is only applicable if the
configured switch is in a multiswitch fabric. The default state is
disabled.
Enabling the rerouting delay ensures that frames are delivered in
order through the fabric to their destination. If there is a change to the