Domain Id, Principal Priority, And Domain Id Lock - McDATA 4314 Installation Manual

Domain ID, Principal Priority, and Domain ID Lock

The following switch configuration settings affect multiple chassis fabrics:
• Domain ID
• Principal priority
• Domain ID lock
The domain ID is a unique number from 1–239 that identifies each switch in a
fabric. The principal priority is a number (1–255) that determines the
principal switch which manages domain ID assignments for the fabric. The
switch with the highest principal priority (1 is high, 255 is low) becomes the
principal switch. If the principal priority is the same for all switches in a
fabric, the switch with the lowest WWN becomes the principal switch.
The domain ID lock allows (False) or prevents (True) the reassignment of the
domain ID on that switch. Switches come from the factory with the domain
ID set to 1, the domain ID lock set to False, and the principal priority set to
254. Refer to the EFCM Basic Management Guide for information about
changing the domain ID and domain ID lock using EFCM BASIC. Refer to the
Set Config command in the McDATA 4314 Command Line Interface Guide for
information about changing the default domain ID, domain ID lock, and
principal priority parameters.
An unresolved domain ID conflict means that the switch with the higher
WWN will isolate as a separate fabric, and the Logged-In LEDs on both
switches will flash green to show the affected ports. If you connect a new
switch to an existing fabric with its domain ID unlocked, and a domain ID
conflict occurs, the new switch will isolate as a separate fabric. However, you
can remedy this by resetting the new switch or taking it offline then back
online. The principal switch will reassign the domain ID and the switch will
join the fabric.
NOTE: Domain ID reassignment is not reflected in zoning that is defined by domain
ID/port number pair or Fibre Channel address. You must reconfigure zones that are
affected by domain ID reassignment. To prevent zoning definitions from becoming
invalid under these conditions, lock the domain IDs using EFCM BASIC or the Set
Config Switch command.
Multiple Chassis Fabrics
Planning 2-7