0

 

 

 

4 – Managing Switches

 

 

 

 

 

 

 

 

Configuring a Switch

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-4. Switch Administrative States

 

 

 

 

 

Parameter

 

Description

 

 

 

 

 

Online

 

The switch is available.

 

Offline

 

The switch is unavailable.

 

Diagnostics

 

The switch is in diagnostics mode, is unavailable, and tests can

 

 

 

then be run on all ports of the switch.

 

 

 

 

 

4.7.2.3

Domain ID and Domain ID Lock

The domain ID is a unique Fibre Channel identifier for the switch. The Fibre Channel address consists of the domain ID, port ID, and the Arbitrated Loop Physical Address (ALPA). The maximum number of switches within a fabric is 239 with each switch having a unique domain ID.

Switches come from the factory with the domain IDs unlocked. This means that if there is a domain ID conflict in the fabric, the switch with the highest principal priority, or the principal switch, will reassign any domain ID conflicts and establish the fabric. If you lock the domain ID on a switch and a domain ID conflict occurs, one of the switches will isolate as a separate fabric and the Logged-In LEDs on both switches will flash to show the affected ports. Refer to the ”Set Config Command” on page A-39for information about the switch keyword and the Domain ID Lock and Principal Priority parameters.

If you connect a new switch to an existing fabric with its domain ID unlocked, and a domain 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 and port number pair. You must reconfigure zones that are affected by domain ID reassignment.

59056-02 A

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Q-Logic 5202, 5200 manual Domain ID and Domain ID Lock, Switch Administrative States