> # FlexAttach Physical to Virtual WWNs

> Field | Description
> --- | ---
> virtual pWWN | This is the virtual port WWN for this device port WWN. In order to minimize WWN collision, no two instances of this Virtual pWWN can have same value. Note:The Virtual pWWN cannot be changed when corresponding device is logged in.
> LastChange | The value of sysUpTime at the time of the last change to this Virtual WWN Entry.

> Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.