4–Managing Fabric Zoning
Zoning Concepts
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WWN entries define zone membership by the World Wide Name of the attached
device. With this membership method, you can move WWN member devices to
different switch ports in different zones without having to edit the member entry as
you would with a domain ID/port number member. Unlike FCID members, WWN
zone members are not affected by changes in the fabric that could change the
Fibre Channel address of an attached device.
FCID entries define zone membership by the Fibre Channel address of the
attached device. With this membership method you can replace a device on the
same port without having to edit the member entry as you would with a WWN
member.
Domain ID/Port number entries define zone membership by switch domain ID and
port number. All devices attached to the specified port become members of the
zone. The specified port must be an F_Port or an FL_Port.
Aliases
To make it easier to add a group of ports or devices to one or more zones, you can
create an alias. An alias is a named set of ports or devices that are grouped
together for convenience. Unlike a zone, an alias imposes no communication
restrictions between its members. You can add an alias to one or more zones.
However, you cannot add a zone to an alias, nor can an alias be a member of
another alias.
Zone Sets
A zone set is a named group of zones. A zone can be a member of more than one
zone set. Each switch in the fabric maintains its own zoning database containing
one or more zone sets. This zoning database resides in non-volatile or permanent
memory and is therefore retained after a reset. Zones that are currently not in a
zone set are considered to be part of the orphan zone set. The orphan zone set is
not an actual zone set, but rather a way of displaying the zones that are not
currently in a zone set.
To apply zoning to a fabric, choose a zone set and activate it. When you activate a
zone set, the switch distributes that zone set and its zones, excluding aliases, to
every switch in the fabric. This zone set is known as the active zone set. See
“Viewing Active and Configured Zone Set Information” on page 4-4 for information
about displaying the active zone set.
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