Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Zones<br />
Zoning divides the fabric for purposes of controlling discovery and inbound traffic.<br />
A zone is a named group of ports or devices. Members of the same zone can<br />
communicate with each other and transmit outside the zone, but cannot receive<br />
inbound traffic from outside the zone. A port/device can be a member of up to<br />
eight zones whose combined membership does not exceed 64.<br />
Zoning is hardware enforced on a switch port if the sum of the logged-in devices<br />
plus the devices zoned with devices on that port is 64 or less. If a port exceeds this<br />
sum, that port behaves as a soft zone member. The port continues to behave as a soft<br />
zone member until the sum of logged-in and zoned devices falls back to 64, and the<br />
port is reset.<br />
A zone can be a component of more than one zone set. Several zone sets can be<br />
defined for a fabric, but only one zone set can be active at one time. The active zone<br />
set determines the current fabric zoning.<br />
Membership in a zone can be defined by switch domain ID and port number, device<br />
Fibre Channel identifier address (FCID), or device World Wide Name (WWN).<br />
• WWN entries define zone membership by the World Wide Name of the attached<br />
device. With this membership method, you can move WWN member devices to<br />
different switch ports in different zones without having to edit the member entry<br />
as you would with a domain ID/port number member. Furthermore, unlike<br />
FCID members, WWN zone members are not affected by changes in the fabric<br />
that could change the Fibre Channel address of an attached device.<br />
• FCID entries define zone membership by the Fibre Channel address of the<br />
attached device. With this membership method you can replace a device on the<br />
same port without having to edit the member entry as you would with a WWN<br />
member.<br />
• Domain ID/Port number entries define zone membership by switch domain ID<br />
and port number. All devices attached to the specified port become members of<br />
the zone. The specified port must be an F_Port or an FL_Port.<br />
Aliases<br />
To make it easier to add a group of ports or devices to one or more zones, you can<br />
create an alias. An alias is a named set of ports or devices that are grouped together<br />
for convenience. Unlike zones, aliases impose no communication restrictions<br />
between its members. You can add an alias to one or more zones. However, you<br />
cannot add a zone to an alias, nor can an alias be a member of another alias.<br />
26 <strong>IBM</strong> <strong>Flex</strong> <strong>System</strong> <strong>FC3171</strong> 8 <strong>Gb</strong> <strong>SAN</strong> <strong>Switch</strong> QuickTools User’s Guide