Multi-Switch Fabrics; Software Diagnostics - HP 316095-B21 - StorageWorks Edge Switch 2/24 Installation Manual

Introduction
CAUTION: If zoning is implemented by port number, a change to the switch fiber-optic
cable configuration disrupts zone operation and may incorrectly include or exclude a
device from a zone.
If zoning is implemented by WWN, removal and replacement of a device HBA or Fibre
Channel interface (thereby changing the device WWN) disrupts zone operation and
may incorrectly include or exclude a device from a zone.
In Open Fabric mode, only zoning by WWN is supported. Zoning by port numbers is
not.
Zones are grouped into zone sets. A zone set is a group of zones that is enabled
(activated) or disabled across all switches in a multi-switch fabric. Only one zone set
can be enabled at one time.

Multi-Switch Fabrics

A Fibre Channel topology that consists of one or more interconnected switches or
switch elements is called a fabric. Operational software provides the ability to
interconnect switches (through expansion port (E_Port) connections) to form a
multi-switch fabric. The data transmission path through the fabric is typically
determined by fabric elements and is user-transparent. Subject to zoning restrictions,
devices attached to any interconnected switch can communicate with each other
through the fabric.

Software Diagnostics

The switch provides the following diagnostic software features that aid in fault
isolation and repair of problems:
• FRUs provide on-board diagnostic and monitoring circuits that continuously
report FRU status to the Embedded Web Server (EWS), HAFM and product
manager applications. These applications provide system alerts and logs that
display failure and diagnostic information at the HAFM server or a remote
workstation communicating with the HAFM server.
• The HAFM Services application that runs as a Windows 2000 service and
provides an additional user interface to display operational status.
• The embedded web server interface that provides Internet access to isolate
problems for a single switch.
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